CN102739213B - Permanent magnetic coil driving circuit - Google Patents
Permanent magnetic coil driving circuit Download PDFInfo
- Publication number
- CN102739213B CN102739213B CN201210249490.XA CN201210249490A CN102739213B CN 102739213 B CN102739213 B CN 102739213B CN 201210249490 A CN201210249490 A CN 201210249490A CN 102739213 B CN102739213 B CN 102739213B
- Authority
- CN
- China
- Prior art keywords
- resistance
- switch pipe
- comparator
- low
- end switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005389 magnetism Effects 0.000 claims description 69
- 230000000052 comparative effect Effects 0.000 claims description 59
- 239000003381 stabilizer Substances 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 102220414581 c.33A>G Human genes 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 102220090095 rs1042713 Human genes 0.000 description 1
- 102220216906 rs1060505002 Human genes 0.000 description 1
- 102220228145 rs1064794513 Human genes 0.000 description 1
- 102220264750 rs1305455942 Human genes 0.000 description 1
- 102220101549 rs199890548 Human genes 0.000 description 1
- 102220012898 rs397516346 Human genes 0.000 description 1
- 102220123496 rs557896607 Human genes 0.000 description 1
- 102220095236 rs876658436 Human genes 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Abstract
The invention relates to a permanent magnetic coil driving circuit which comprises an H electrical bridge and first and second group pair tube control circuits, wherein the H electrical bridge is formed by first and second low-end switching tubes and first and second high-end switching tubes; the first low-end switching tube and the second high-end switching tube are a first group of pair tubes for controlling to power up a coil; the second low-end switching tube and the first high-end switching tube are a second group of pair tubes for controlling to power up the coil; each high-end switching tube is connected with a corresponding high-end driving circuit; each low-end switching tube is connected with a corresponding low-end driving circuit; the first and second group pair tube control circuits are of the same structure and are respectively used for controlling the first and second group of pair tubes; and the first and second group pair tube control circuits comprise comparators, control circuits and comparison level circuits. According to the invention, two groups of pair tube circuits can be controlled to be alternately conducted by two comparators, and thus, a control port of the permanent magnetic coil driving circuit also only requires two permanent magnetic switching-on devices and two permanent magnetic switching-off devices and port resources are saved.
Description
Technical field
The present invention relates to a kind of permanent magnetism coil driver.
Background technology
The type of drive of existing solenoid is that the H bridge circuit that adopts single chip circuit to control triode formation is realized, single-chip microcomputer controls by four ports the two high-end switch pipes and the conducting in turn of low-end switch pipe that form H electric bridge respectively, which has taken more port resource, if programming goes wrong, occurred that output simultaneously makes the level of described two pairs of switching tube conductings, H electric bridge will burn; Just can control that this two couple is high-end, the conducting in turn of low-end switch pipe so how two inputs are provided, and in the time there is making the level of described switching tube conducting in two inputs simultaneously, can random conducting arbitrary group to pipe, be the technical barrier of this area with the drive circuit of avoiding H electric bridge to burn out.
Summary of the invention
The primary technical problem solving of the present invention is to provide a kind of a group of single input control H electric bridge permanent magnetism coil driver to pipe conducting that is suitable for.
The technical problem of its less important solution of the present invention is permanent magnetism when closing the input dividing with permanent magnetism and occurring the level of described switching tube conducting simultaneously, the permanent magnetism coil driver of avoiding H electric bridge to burn out.
For solving the problems of the technologies described above, the invention provides a kind of permanent magnetism coil driver, comprise: the H electric bridge that has respectively the first low-end switch pipe Q1 and the second low-end switch pipe Q2 and the first high-end switch pipe Q3 and the second high-end switch pipe Q4 to form, wherein to be that first group of control coil L1 obtains electric to pipe for the first low-end switch pipe Q1 and the second high-end switch pipe Q4, the second low-end switch pipe Q2 and the first high-end switch pipe Q3 are that coil L1 obtains electric to pipe described in second group of control, each high-end switch pipe is connected with corresponding high-end drive circuit, each low-end switch pipe is connected with corresponding low-side driver circuitry,
Also comprise: control respectively described first, second group to identical first, second group of the structure of pipe to pipe control circuit; Described first, second group all comprises pipe control circuit: comparator, control circuit, comparative level circuit; The in-phase end of described comparator is connected with external control signal, and the output of this comparator is connected with the input of described control circuit, described low-side driver circuitry input respectively; The output of described control circuit is connected with described comparative level circuit control input end; The output of described comparative level circuit is connected with the end of oppisite phase of the comparator of another group; Described comparator is suitable for, in the time of output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting; Described control circuit is suitable in the time of described comparator output high level, control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and the output voltage that improves described comparative level circuit is greater than the input voltage of the in-phase end of the comparator of described another group; Or when described comparator output low level, control a described high-end drive circuit and make a corresponding high-end switch pipe cut-off; Described comparative level circuit, is suitable for providing comparative voltage.
Further, in order to make the corresponding high-end drive circuit of comparison circuit control, make the conducting of described high-end switch pipe or cut-off; Described control circuit comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2, the negative electrode of described the first photoelectrical coupler DA1, anode respectively with the corresponding connection of anode, negative electrode of the second photoelectrical coupler DA2, and form the first node J1, the second node J2; Described the first node J1 is as the output of described control circuit, and described the second node J2 is as the input of this control circuit; The emitter of described the first photoelectrical coupler DA1 is connected with the collector electrode of described the second photoelectrical coupler DA2, the emitter of described the second photoelectrical coupler DA2 is as corresponding floating ground end, and the collector electrode of described the first photoelectrical coupler DA1 is connected with driving power; The collector electrode of described the second photoelectrical coupler DA2 is also connected with the input of described high-end switch tube drive circuit; The earth terminal of described high-end switch tube drive circuit is connected with described floating ground end.
Further, in order to drive the conducting of high-end switch pipe or cut-off, the high-end drive circuit of described high-end switch pipe comprises: the 14 diode VD14, the 15 resistance R the 15, the 16 resistance R 16, the three positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13; The anode of described the 14 diode VD14 is connected with the base stage of the 3rd positive-negative-positive triode V3, one end of the 16 resistance R 16, forms the input of described high-end switch tube drive circuit; The anode of the other end of described the 16 resistance R 16, the collector electrode of the 3rd positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13 is connected with described floating ground end; The negative electrode of described the 14 diode VD14 is connected with the emitter of the 3rd positive-negative-positive triode V3, one end of the 15 resistance R 15; The other end of described the 15 resistance R 15 is connected with the negative electrode of the 13 voltage-stabiliser tube VD13, as the output of described high-end drive circuit, and be connected with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe is connected with the earth terminal of described high-end switch tube drive circuit.
Further, in the time that described control circuit input is high level, to improve the output voltage of described comparative level circuit, make another group can not cause because of erroneous input high level all switching tube conductings of H electric bridge to pipe control circuit; Described comparative level circuit comprises: the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first diode VD1, the second diode VD2, the 6th capacitor C 6; One end of described the first resistance R 1 is connected with a power supply, and the other end is connected with described the second resistance R 2, one end of the 3rd resistance R 3, one end of the 6th capacitor C 6 respectively, the other end ground connection of described the 6th capacitor C 6; The other end of described the second resistance R 2 is connected with the anode of described the first diode VD1, one end of the 4th resistance R 4, described the first node J1 respectively; The other end of described the 3rd resistance R 3 is connected with the negative electrode of described the first diode VD1, the negative electrode of the second diode VD2, the end of oppisite phase of comparator respectively; The other end of described the 4th resistance R 4, the plus earth of described the second diode VD2.
Further, in order to drive the conducting of low-end switch pipe or cut-off, described low side tube drive circuit comprises: the 6th resistance R 6, the 7th resistance R 7, the three diode VD3, a NPN type triode V1, the 4th voltage-stabiliser tube VD4; Described the 6th one end of resistance R 6 and the output of described comparator are connected, the other end is connected with the anode of described the 3rd diode VD3, the base stage of a NPN type triode V1, a described emitter of NPN type triode V1 and the negative electrode of the 3rd diode VD3, one end of described the 7th resistance R 7 are connected, and the other end of described the 7th resistance R 7 is connected with the negative electrode of the 4th voltage-stabiliser tube VD4, the base stage of corresponding low-end switch pipe; The anode of described the 4th voltage-stabiliser tube VD4, the grounded collector of a NPN type triode V1.
Further, in order to prevent input signal shake, the in-phase end of described comparator is connected with an input resistance, ground capacity.
In this circuit, the incoming level scope of described first, second group to pipe control circuit, i.e. the incoming level scope of first, second comparator, high level 5v, low level 0v.
Power supply in described comparative level circuit is the voltage source that is greater than 5V, generally gets 5-20V, gets 13V the best, also can be according to the power values of the suitable adjustment comparative level circuit of the type of the comparator of selecting.
The power supply of comparator is according to corresponding comparator-type, and general desirable 5-20V, gets 13V the best.
The present invention also provides a kind of method of work of permanent magnetism coil driver, comprising:
1. the permanent magnetism of being exported by processor closes the in-phase end that accesses to respectively the first comparator 01 and the second comparator with permanent magnetism dividing control signal;
If 2. to close control signal be high level to described permanent magnetism, and permanent magnetism dividing control signal is low level, the in-phase end voltage of described the first comparator is higher than end of oppisite phase voltage, this the first comparator output high level, to control the first low-side driver circuitry of the first low-end switch pipe Q1, makes this first low-end switch pipe Q1 conducting;
The high level of described the first comparator output also accesses to second control circuit, and the second high-end drive circuit of this second control circuit control the second high-end switch pipe Q4 makes the second high-end switch pipe Q4 conducting, and improves the output voltage of the second comparative level circuit;
The permanent magnetism coil L1 being located between described the first low-end switch pipe Q1 and the second high-end switch pipe Q4 obtains electric;
The output voltage of the second comparative level circuit inputs to the end of oppisite phase of the second comparator; The in-phase end voltage of described the second comparator is lower than the input voltage of its end of oppisite phase, described the second comparator output low level; Low level control second low-side driver circuitry of this second comparator output makes the second low-end switch pipe Q2 cut-off;
The low level of described the second comparator output also accesses to first control circuit, and described first control circuit control the first high-end switch tube drive circuit makes the first high-end switch pipe Q3 cut-off;
If 3. described permanent magnetism dividing control signal is high level, and it is low level that permanent magnetism closes control signal, the in-phase end voltage of described the second comparator is higher than end of oppisite phase voltage, this the second comparator output high level, to control the second low-side driver circuitry of the second low-end switch pipe Q2, makes this second low-end switch pipe Q2 conducting;
The high level of described the second comparator output also accesses to first control circuit, and the first high-end drive circuit of this first control circuit control the first high-end switch pipe Q3 makes the first high-end switch pipe Q3 conducting, and improves the output voltage of the first comparative level circuit;
The permanent magnetism coil L1 being located between described the second low-end switch pipe Q2 and the first high-end switch pipe Q3 obtains electric;
The output voltage of the first comparative level circuit inputs to the end of oppisite phase of the first comparator; The in-phase end voltage of described the first comparator is lower than the input voltage of its end of oppisite phase, described the first comparator output low level; Low level control first low-side driver circuitry of this first comparator output makes the first low-end switch pipe Q1 cut-off;
The low level of described the first comparator output also accesses to second control circuit, and described second control circuit control the second high-end switch tube drive circuit makes the second high-end switch pipe Q4 cut-off;
Further, for in the time that first control circuit input is high level, to improve the output voltage of the first comparative level circuit, make first group of all switching tube conducting that can not cause because of erroneous input high level (permanent magnetism is combined into high level) H electric bridge to pipe control circuit; Described first control circuit comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2, the anodic bonding of the negative electrode of described the first photoelectrical coupler DA1 and the second photoelectrical coupler DA2, and the anode that forms the first node J1, the first photoelectrical coupler DA1 on this connecting line is connected with the negative electrode of the second photoelectrical coupler DA2 respectively and this connecting line on form the second node J2; Described the first node J1 is as the output of this first control circuit, and described the second node J2 is as the input of this first control circuit; The emitter of described the first photoelectrical coupler DA1 is connected with the collector electrode of described the second photoelectrical coupler DA2, and the emitter of described the second photoelectrical coupler DA2 is as left suspension earth terminal, and the collector electrode of described the first photoelectrical coupler DA1 is connected with driving power; The collector electrode of described the second photoelectrical coupler DA2 is also connected with the input of the first high-end switch tube drive circuit; The earth terminal of described the first high-end switch tube drive circuit is connected with described left suspension earth terminal;
The control step of described first control circuit comprises:
In the time of the input high level of the control input end of first control circuit, described the second photoelectrical coupler DA2 cut-off, described the first photoelectrical coupler DA1 conducting, the driving power of being located at described the first photoelectrical coupler DA1 collector electrode accesses to the collector electrode of described the second photoelectrical coupler DA2, and input to the first high-end switch pipe Q3 by the 14 diode VD14, the 15 resistance R 15, i.e. this first high-end switch pipe conducting;
The high level of simultaneously working as the control input end of the described first control circuit of input also accesses to the input of described the first comparative level circuit, improve described the first diode VD1 anode potential, and then the output voltage that improves described the first comparative level circuit is greater than the input voltage of the in-phase end of described the first comparator;
In the time of the input low level of the control input end of first control circuit, described the second photoelectrical coupler DA2 conducting, described the first photoelectrical coupler DA1 cut-off, the collector and emitter of described the second photoelectrical coupler DA2 is to described floating ground end short circuit, and this first high-end switch pipe Q3 ends;
Described second control circuit is identical with structure and the operation principle of first control circuit.
The present invention has the following advantages: (1) two comparator just can be controlled two groups pipe circuit is carried out to conducting in turn, so its control port is also as long as two permanent magnetism close with permanent magnetism and divide, has saved port resource; (2) comparator, control circuit, comparative level circuit cooperating, can improve the output voltage of comparative level circuit, while preventing another comparator in-phase input end erroneous input high level, the in-phase end of two comparators is simultaneously when input high level, two groups all there is the situation of conducting, avoid H electric bridge to burn to pipe; (3) connect a ground capacity at in-phase end, there is anti-shake function; (4) the 12, the 14 diode that high-end switch tube drive circuit base stage each the 3rd, the 4th PNP triode is connected with emitter can effectively prevent drive circuit overload.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of permanent magnetism coil driver of the present invention;
Fig. 2 is the structural representation of the H electric bridge of permanent magnetism coil driver of the present invention;
Fig. 3 is the circuit diagram of permanent magnetism coil driver of the present invention;
Fig. 4 is first control circuit and the first high-end drive circuit figure of permanent magnetism coil driver of the present invention;
Fig. 5 is the first comparison circuit, the second comparative level circuit and the first low-side driver circuitry figure of permanent magnetism coil driver of the present invention;
Fig. 6 is second control circuit and the second high-end drive circuit figure of permanent magnetism coil driver of the present invention;
Fig. 7 is the second comparison circuit, the first comparative level circuit and the second low-side driver circuitry figure of permanent magnetism coil driver of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
Embodiment 1
See Fig. 1,2, a kind of permanent magnetism coil driver, comprise: the H electric bridge that has respectively the first low-end switch pipe Q1 and the second low-end switch pipe Q2 and the first high-end switch pipe Q3 and the second high-end switch pipe Q4 to form, wherein to be that first group of control coil L1 obtains electric to pipe for the first low-end switch pipe Q1 and the second high-end switch pipe Q4, the second low-end switch pipe Q2 and the first high-end switch pipe Q3 are that coil L1 obtains electric to pipe described in second group of control, each high-end switch pipe is connected with corresponding high-end drive circuit, and each low-end switch pipe is connected with corresponding low-side driver circuitry;
Also comprise: control respectively described first, second group to identical first, second group of the structure of pipe to pipe control circuit; Described first pair of pipe control circuit 1, second group all comprise pipe control circuit 2: comparator, control circuit, comparative level circuit;
The in-phase end of described comparator is connected with external control signal, and the output of this comparator is connected with the input of described control circuit, described low-side driver circuitry input respectively;
The output of described control circuit is connected with described comparative level circuit control input end;
The output of described comparative level circuit is connected with the end of oppisite phase of the comparator of another group;
Described comparator is suitable for, in the time of output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting;
Described control circuit is suitable in the time of described comparator output high level, control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and the output voltage that improves described comparative level circuit is greater than the input voltage of the in-phase end of the comparator of described another group; Or when described comparator output low level, control a described high-end drive circuit and make a corresponding high-end switch pipe cut-off;
Described comparative level circuit, is suitable for providing comparative voltage.
Wherein, see Fig. 4, described control circuit comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2, the negative electrode of described the first photoelectrical coupler DA1, anode respectively with the corresponding connection of anode, negative electrode of the second photoelectrical coupler DA2, and form the first node J1, the second node J2; Described the first node J1 is as the output of described control circuit, and described the second node J2 is as the input of this control circuit; The emitter of described the first photoelectrical coupler DA1 is connected with the collector electrode of described the second photoelectrical coupler DA2, the emitter of described the second photoelectrical coupler DA2 is as corresponding floating ground end, and the collector electrode of described the first photoelectrical coupler DA1 is connected with driving power; The collector electrode of described the second photoelectrical coupler DA2 is also connected with the input of described high-end switch tube drive circuit; The earth terminal of described high-end switch tube drive circuit is connected with described floating ground end.
Described control circuit also comprises: the 15 diode VD15, the second capacitor C 2; One end of the negative electrode of described the 15 diode VD15 and the second capacitor C 2 is connected with described driving power; The other end of the anode of described the 15 diode VD15 and the second capacitor C 2 is connected with described floating ground end.
See Fig. 4, the high-end drive circuit of described high-end switch pipe comprises: the 14 diode VD14, the 15 resistance R the 15, the 16 resistance R 16, the three positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13; The anode of described the 14 diode VD14 is connected with the base stage of the 3rd positive-negative-positive triode V3, one end of the 16 resistance R 16, forms the input of described high-end switch tube drive circuit; The anode of the other end of described the 16 resistance R 16, the collector electrode of the 3rd positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13 is connected with described floating ground end; The negative electrode of described the 14 diode VD14 is connected with the emitter of the 3rd positive-negative-positive triode V3, one end of the 15 resistance R 15; The other end of described the 15 resistance R 15 is connected with the negative electrode of the 13 voltage-stabiliser tube VD13, as the output of described high-end drive circuit, and be connected with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe is connected with the earth terminal of described high-end switch tube drive circuit.
See Fig. 5, described comparative level circuit comprises: the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first diode VD1, the second diode VD2, the 6th capacitor C 6; One end of described the first resistance R 1 is connected with a power supply, and the other end is connected with described the second resistance R 2, one end of the 3rd resistance R 3, one end of the 6th capacitor C 6 respectively, the other end ground connection of described the 6th capacitor C 6; The other end of described the second resistance R 2 is connected with the anode of described the first diode VD1, one end of the 4th resistance R 4, described the first node J1 respectively; The other end of described the 3rd resistance R 3 is connected with the negative electrode of described the first diode VD1, the negative electrode of the second diode VD2, the end of oppisite phase of comparator respectively; The other end of described the 4th resistance R 4, the plus earth of described the second diode VD2.
Described low side tube drive circuit comprises: the 6th resistance R 6, the 7th resistance R 7, the three diode VD3, a NPN type triode V1, the 4th voltage-stabiliser tube VD4; Described the 6th one end of resistance R 6 and the output of described comparator are connected, the other end is connected with the anode of described the 3rd diode VD3, the base stage of a NPN type triode V1, a described emitter of NPN type triode V1 and the negative electrode of the 3rd diode VD3, one end of described the 7th resistance R 7 are connected, and the other end of described the 7th resistance R 7 is connected with the negative electrode of the 4th voltage-stabiliser tube VD4, the base stage of corresponding low-end switch pipe; The anode of described the 4th voltage-stabiliser tube VD4, the grounded collector of a NPN type triode V1.
The in-phase end of described comparator is connected with an input resistance, ground capacity.
See Fig. 3-7, particularly Fig. 6,7 shows second control circuit and the second high-end drive circuit figure and the second comparison circuit, the first comparative level circuit and the second low-side driver circuitry figure; Its structure and first control circuit, the first high-end drive circuit, the second comparative level circuit and the first low-side driver circuitry are identical.
See Fig. 1, described first pair of pipe control circuit 1, second group all comprise pipe control circuit 2: comparator, control circuit, comparative level circuit; Now each group is divided into groups to pipe control circuit, i.e. described first pair of pipe control circuit 1, comprising: the first comparator 101, second control circuit 103, the second comparative level circuit 105; Described second pair of pipe control circuit 2, comprising: the second comparator 201, first control circuit 203, the first comparative level circuit 205.
In this execution mode, the structure of the described comparator of each group, control circuit, comparative level circuit is identical, therefore circuit no longer repeats to represent; Components and parts model and circuit resistance that the each circuit of this execution mode is now shown are as follows:
R1=R3=R4=R8=R9=R11=10KΩ
R2=R5=R6=R10=R12=R13=2.2kΩ
R7=R15=R18=R14=39Ω
R16=R17=47?kΩ
The power supply of comparative level circuit is got 13V, and the power supply of comparator is got 13V.
Comparator can adopt the operational amplifier in open loop situations; There is non-linear feature in the operational amplifier of open loop situations, be that in-phase end voltage ratio end of oppisite phase voltage is high, output high level (equals the maximum of amplifier operating voltage, power positive end of the present invention meets 13V, so output high level is 13V), in-phase end voltage ratio end of oppisite phase voltage is low, and output low level (equals the minimum value of amplifier operating voltage, power supply of the present invention one end ground connection, so low level output is 0V).
A kind of permanent magnetism coil driver of the present invention is applicable to by NPN, positive-negative-positive switching tube, or the H bridge circuit of various metal-oxide-semiconductor formation.
Embodiment 2
See Fig. 3, Fig. 3 shows physical circuit execution mode and the principle of this switch tube driving circuit; For for simplicity, same or analogous components and parts adopt same or analogous label; In this embodiment, comparator adopts dual comparator integrated circuit, changes U1A into so the label of the first comparator changes the label of U1B, the second comparator into.
On the basis of embodiment 1, switching tube can adopt metal-oxide-semiconductor to replace, and the drive principle of H electric bridge is as follows:
This circuit takes into full account the driving reliability of H electric bridge, avoids the straight-through of upper and lower bridge arm when circuit design completely, and concrete truth table is as following table 1:
The driving truth table of table 1 H electric bridge
The operation principle of this circuit is as follows: this circuit mainly contains two comparators, four optocouplers and a small amount of several passive device composition, and the switching tube described in present embodiment is metal-oxide-semiconductor.
Wherein the 4th voltage-stabiliser tube VD4; the 5th voltage-stabiliser tube VD5; the 12 voltage-stabiliser tube VD12; the 13 voltage-stabiliser tube VD13 is respectively the grid overvoltage protection voltage-stabiliser tube of the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4; for inductive load; in the time that high-end switch pipe disconnects, the electric current fly-wheel diode of can flowing through.Due to the resonance between inductance and parasitic capacitance, the voltage on the grid of the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4 may rise to overvoltage condition.This overvoltage protection voltage-stabiliser tube is got 13V Zener diode the voltage on grid is carried out to clamp, thereby avoids overpressure conditions; The 7th resistance R the 7, the 17 resistance R the 17, the 14 resistance R the 14, the 15 resistance R 15 is grid driving resistance, selects according to required tSW. switching time.Refer to the charge Q gd and the required time of Qgs that Cgd, Cgs and switching tube are charged to requirement switching time; The one PNP triode V1, the 2nd PNP triode V2, the 3rd PNP triode V3, the 4th PNP triode V4 is that each switching tube turn-offs triode fast, ensures that switching tube quick (within the time of delicate level) enters cut-off region from saturation region.The 3rd diode VD3, the 6th diode VD6, the 11 diode VD11, the 14 diode VD14 is the open wireless tunnel of the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4, ensures the reliable conducting of each switching tube.All devices form the most basic drive circuit of the pipe that opens the light above.
Permanent magnetism divides permanent magnetism to be combined into the Transistor-Transistor Logic level signal that processor sends, and this level signal is sent into after comparator directly driving switch pipe, because high-end and driving power low side are different.The driving voltage of low side take ground as reference, and therefore this driving is by directly confession of DC power supply, and the output of comparator directly drives the first low-end switch pipe Q1 and the second low-end switch pipe Q2.But high-end is unsettled, therefore needs to use Bootstrapping drive circuit, its operation principle is as described below.Observe Fig. 3 or Fig. 4, shown in the left side of H bridge circuit, Bootstrapping drive circuit utilizes the second capacitor C the 2, the 15 diode VD15 to realize.The overvoltage protection of bootstrap capacitor is completed by the 15 diode VD15, as mentioned above, for inductive load, in the time that high-end switch pipe disconnects, the electric current fly-wheel diode of can flowing through.Due to the resonance between inductance and parasitic capacitance, the voltage on electric capacity may rise to overvoltage condition.13 V Zener diode the 15 diode VD15 carry out clamp to the voltage on electric capacity, thereby avoid overpressure conditions.
The 8th resistance R 8, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R 11 in the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the second comparative level circuit in described the first comparative level circuit forms respectively the end of oppisite phase Signal level assignment device of the first comparator U1B and the second comparator B1A, with the first comparator U1B and the second comparator U1A, the first photoelectrical coupler DA1, the second photoelectrical coupler DA2, the 3rd photoelectrical coupler DA3, the 4th photoelectrical coupler DA4 constitutes jointly logic control, to realize the driving logic in table.
When normality, permanent magnetism divides under normal circumstances, permanent magnetism closes does not have signal input, be all 0V(TTL low level), due to the first comparator U1B and the second comparator B1A end of oppisite phase level be resistor network, all high than the positive terminal of each comparator in any case, according to the characteristic of comparator, the output pin output of two comparators is 0V forever, the one PNP triode V1, the 2nd PNP triode V2 conducting, the first low-end switch pipe Q1, the second low-end switch pipe Q2 is turned off, the negative electrode of the second photoelectrical coupler DA2 being connected with the output of the second comparator U1A and the anode of the first photoelectrical coupler DA1 are also pulled to 0V, the second photoelectrical coupler DA2 is by the second resistance R 2, the first resistance R 1 forms loop conducting with 13V power supply, the 3rd PNP triode V3 conducting, the first high-end switch pipe Q3 turn-offs, the end of oppisite phase of the first comparator U1B obtains by the 3rd resistance R 3 comparative level that the branch pressure voltage 3V in the second photoelectrical coupler DA2 conducting loop closes as permanent magnetism, the first diode VD1, the second diode VD2 is the reverse-phase protection circuit of the end of oppisite phase of the first comparator U1B, the 6th capacitor C 6, the 7th capacitor C 7 is de-twitter circuit, prevent instantaneous interference, increase the stability of circuit.Now the first photoelectrical coupler DA1 is owing to not having conducting loop to close (its anode and negative electrode are all low level).In like manner, the negative electrode of the 4th photoelectrical coupler DA4 being connected with the output of the first comparator U1B and the anode of the 3rd photoelectrical coupler DA3 are also pulled to 0V, the 4th photoelectrical coupler DA4 is by the tenth resistance R 10, the 8th resistance R 8 forms loop conducting with 13V power supply, the 4th PNP triode V4 conducting, the second high-end switch pipe Q4 turn-offs, the end of oppisite phase of the second comparator U1A obtains by the 8th resistance R 8 comparative level that the branch pressure voltage 3V in the 4th photoelectrical coupler DA4 conducting loop divides as permanent magnetism, the 7th diode VD7, the 8th diode VD8 is the reverse-phase protection circuit of the end of oppisite phase of the second comparator U1A, the 4th capacitor C 4, the 5th capacitor C 5 is de-twitter circuit, prevent instantaneous interference, increase the stability of circuit.Now the 3rd photoelectrical coupler DA3 is owing to not having conducting loop to close (its anode and negative electrode are all low level).
Control permanent magnet mechanism timesharing, when dividing, permanent magnetism have signal to be input as 5V(TTL high level), permanent magnetism closes does not have signal to be input as 0V(TTL low level), now the in-phase end level of the second comparator U1A is the end of oppisite phase 3V of 5V higher than this comparator U1A, the 1 pin output 13V high level of this comparator U1A, by the 13 resistance R 13, the 6th diode VD6, the 14 resistance R 14, make the second low-end switch pipe Q2 conducting, the negative electrode of the second photoelectrical coupler DA2 that the output of the second comparator U1A is connected is also pulled to 13V with the anode that is pulled to 13V the first photoelectrical coupler DA1, the first photoelectrical coupler DA1 forms loop conducting by the 4th resistance R 4 and power supply ground, driving power is by the collector electrode of the first photoelectrical coupler DA1, emitter the 14 diode VD14 of the first photoelectrical coupler DA1, the 15 resistance R 15, make the first high-end switch pipe Q3 conducting, the end of oppisite phase of the first comparator U1B obtains by the 3rd resistance R 3 comparative level that the branch pressure voltage 12V in the first photoelectrical coupler DA1 conducting loop closes as permanent magnetism, raise by force comparative level permanent magnetism close (Transistor-Transistor Logic level 0-5V) by is forced shield, the output of guaranteeing the first comparator U1B is output as 0V, now the second photoelectrical coupler DA2 is owing to not having conducting loop to close (its anode and negative electrode are all high level).The negative electrode of the 4th photoelectrical coupler DA4 and the anode of the 3rd photoelectrical coupler DA3 that the output of the first comparator U1B is connected are also pulled to 0V, the 4th photoelectrical coupler DA4 is by the tenth resistance R 10, the 8th resistance R 8 forms loop conducting with 13V power supply, the 4th PNP triode V4 conducting, the second high-end switch pipe Q4 is turn-offed, and the end of oppisite phase of the second comparator U1A obtains by the 8th resistance R 8 comparative level that the branch pressure voltage 3V in the 4th photoelectrical coupler DA4 conducting loop divides as permanent magnetism.Therefore the first high-end switch pipe Q3 and the second low-end switch pipe Q2 conducting, drives permanent magnet mechanism to carry out sub-switching operation.This process is after a pulse completes, revert to normality, permanent magnetism divides under normal circumstances, permanent magnetism closes does not have signal input, be all 0V(TTL low level), thereby make a PNP triode V1, the 2nd PNP triode V2, the 3rd PNP triode V3, the 4th PNP triode V4 conducting, therefore the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4 turn-off.
When control permanent magnet mechanism closes, when having closed pulse signal, permanent magnetism is input as 5V(TTL high level), permanent magnetism divides does not have signal to be input as 0V(TTL low level), now the in-phase end level of the first comparator U1B is the end of oppisite phase 3V of 5V higher than this comparator U1B, the output output 13V high level of the first comparator U1B, by the 6th resistance R 6, the 3rd PNP diode VD3, the 7th resistance R 7, make the first low-end switch pipe Q1 conducting, the negative electrode of the 4th photoelectrical coupler DA4 being connected with the output of the first comparator U1B and the anode of the 3rd photoelectrical coupler DA3 are also pulled to 13V, the 3rd photoelectrical coupler DA3 forms loop conducting by the 11 resistance R 11 and power supply ground, driving power is by the collector electrode of the 3rd photoelectrical coupler DA3, emitter the 11 diode VD11 of the 3rd photoelectrical coupler DA3, the 18 resistance R 18, make the second high-end switch pipe Q4 conducting, the end of oppisite phase of the second comparator U1A obtains by the 9th resistance R 9 comparative level that the branch pressure voltage 12V in the 3rd photoelectrical coupler DA3 conducting loop closes as permanent magnetism, raise by force comparative level, permanent magnetism divides (Transistor-Transistor Logic level 0-5V) to be forced shielding, the output of guaranteeing the second comparator U1A is output as 0V, now the 4th photoelectrical coupler DA4 is owing to not having conducting loop to close (its anode and negative electrode are all high level).The second negative electrode of the second photoelectrical coupler DA2 and anode of the first photoelectrical coupler DA1 being connected compared with the output of device U1A is also pulled to 0V, the second photoelectrical coupler DA2 is by the second resistance R 2, the first resistance R 1 forms loop conducting with 13V power supply, the 3rd PNP triode V3 conducting, the first high-end switch pipe Q3 is turn-offed, and the end of oppisite phase of the first comparator U1B obtains by the 3rd resistance R 3 comparative level that the branch pressure voltage 3V in the second photoelectrical coupler DA2 conducting loop divides as permanent magnetism.Therefore the first low-end switch pipe Q1 and the second high-end switch pipe Q4 conducting, drives permanent magnet mechanism to carry out closing operation.This process was entered after a pulse completes, revert to normality, permanent magnetism divides under normal circumstances, permanent magnetism closes does not have signal input, be all 0V(TTL low level), thereby make a PNP triode V1, the 2nd PNP triode V2, the 3rd PNP triode V3, the 4th PNP triode V4 conducting, therefore the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4 turn-off.
Illegal state, there is pulse signal to be input as 5V(TTL high level when permanent magnetism closes, permanent magnetism divides), for illegal state, microprocessor can not send such signal, there is the input of the 5V of TTL high level even if permanent magnetism closes when abnormal, permanent magnetism divides, by the each group of random conducting the first low-end switch pipe Q1, the second high-end switch pipe Q4 or the second low-end switch pipe Q2, the first high-end switch pipe Q3, prevent the first low-end switch pipe Q1, the first high-end switch pipe Q3 or the second low-end switch pipe Q2, the second high-end switch pipe Q4 is straight-through and burn out switching tube.
Embodiment 3
See Fig. 1-5, on the basis of embodiment 1, a kind of method of work of permanent magnetism coil driver, comprising:
1. the permanent magnetism of being exported by processor closes the in-phase end that accesses to respectively the first comparator 101, the second comparator 201 with permanent magnetism dividing control signal; Wherein to close with high level 5V, the low level of permanent magnetism dividing control signal be 0V to permanent magnetism; The supply voltage of the first comparator 101 and the second comparator 201 is 5-20V, generally gets 13V; The power supply of comparative level circuit is also got 13V;
If 2. to close control signal be high level to described permanent magnetism, and permanent magnetism dividing control signal is low level, the in-phase end voltage of described the first comparator 101 is higher than end of oppisite phase voltage, this first comparator 101 is exported high level to control the first low-side driver circuitry 102 of the first low-end switch pipe Q1, makes this first low-end switch pipe Q1 conducting;
The high level that described the first comparator 101 is exported also accesses to second control circuit 103, the second high-end drive circuit 104 that this second control circuit 103 is controlled the second high-end switch pipe Q4 makes the second high-end switch pipe Q4 conducting, and improves the output voltage of the second comparative level circuit 105;
The permanent magnetism coil L1 being located between described the first low-end switch pipe Q1 and the second high-end switch pipe Q4 obtains electric;
The output voltage of the second comparative level circuit 105 inputs to the end of oppisite phase of the second comparator 201; The in-phase end voltage of described the second comparator 201 is lower than the input voltage of its end of oppisite phase, described the second comparator 201 output low levels; Low level control the second low-side driver circuitry 202 that this second comparator 201 is exported makes the second low-end switch pipe Q2 cut-off;
The low level that described the second comparator 201 is exported also accesses to first control circuit 203, and described first control circuit 203 is controlled the first high-end switch tube drive circuit 204 and made the first high-end switch pipe Q3 cut-off;
If 3. described permanent magnetism dividing control signal is high level, and it is low level that permanent magnetism closes control signal, the in-phase end voltage of described the second comparator 201 is higher than end of oppisite phase voltage, this second comparator 201 is exported high level to control the second low-side driver circuitry 202 of the second low-end switch pipe Q2, makes this second low-end switch pipe Q2 conducting;
The high level that described the second comparator 201 is exported also accesses to first control circuit 203, the first high-end drive circuit 204 that this first control circuit 203 is controlled the first high-end switch pipe Q3 makes the first high-end switch pipe Q3 conducting, and improves the output voltage of the first comparative level circuit 205;
The permanent magnetism coil L1 being located between described the second low-end switch pipe Q2 and the first high-end switch pipe Q3 obtains electric;
The output voltage of the first comparative level circuit 205 inputs to the end of oppisite phase of the first comparator 101; The in-phase end voltage of described the first comparator 101 is lower than the input voltage of its end of oppisite phase, described the first comparator 101 output low levels; Low level control the first low-side driver circuitry 102 that this first comparator 101 is exported makes the first low-end switch pipe Q1 cut-off;
The low level that described the first comparator 101 is exported also accesses to second control circuit 103, and described second control circuit 103 is controlled the second high-end switch tube drive circuit 104 and made the second high-end switch pipe Q4 cut-off;
Further, described first control circuit 203 comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2, the anodic bonding of the negative electrode of described the first photoelectrical coupler DA1 and the second photoelectrical coupler DA2, and the anode that forms the first node J1, the first photoelectrical coupler DA1 on this connecting line is connected with the negative electrode of the second photoelectrical coupler DA2 respectively and this connecting line on form the second node J2; Described the first node J1 is as the output of this first control circuit 203, and described the second node J2 is as the input of this first control circuit 203; The emitter of described the first photoelectrical coupler DA1 is connected with the collector electrode of described the second photoelectrical coupler DA2, and the emitter of described the second photoelectrical coupler DA2 is as a floating ground end, and the collector electrode of described the first photoelectrical coupler DA1 is connected with driving power; The collector electrode of described the second photoelectrical coupler DA2 is also connected with the input of described high-end switch tube drive circuit; The earth terminal of described high-end switch tube drive circuit is connected with described floating ground end;
Described first control circuit 203 also comprises: the 15 diode VD15, the second capacitor C 2; One end of the negative electrode of described the 15 diode VD15 and the second capacitor C 2 is connected with described driving power; The other end of the anode of described the 15 diode VD15 and the second capacitor C 2 is connected with described floating ground end;
The control step of described first control circuit 203 comprises:
In the time of the input high level of the control input end of first control circuit 203, described the second photoelectrical coupler DA2 cut-off, described the first photoelectrical coupler DA1 conducting, the driving power of being located at described the first photoelectrical coupler DA1 collector electrode accesses to the collector electrode of described the second photoelectrical coupler DA2, and input to the first high-end switch pipe Q3 by the 14 diode VD14, the 15 resistance R 15, i.e. this first high-end switch pipe conducting;
The high level of simultaneously working as the control input end of the described first control circuit 203 of input also accesses to the input of described the first comparative level circuit 205, improve described the first diode VD1 anode potential, and then the output voltage that improves described the first comparative level circuit 205 is greater than the input voltage of the in-phase end of described the first comparator 101;
In the time of the input low level of the control input end of first control circuit 203, described the second photoelectrical coupler DA2 conducting, described the first photoelectrical coupler DA1 cut-off, the collector and emitter of described the second photoelectrical coupler DA2 is to described floating ground end short circuit, and this first high-end switch pipe Q3 ends;
Described second control circuit 103 is identical with structure and the operation principle of first control circuit 203.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.
Claims (6)
1. a permanent magnetism coil driver, comprise: have respectively first, second low-end switch pipe and first, the H electric bridge that the second high-end switch pipe forms, wherein to be that first group of control coil obtains electric to pipe for the first low-end switch pipe and the second high-end switch pipe, the second low-end switch pipe and the first high-end switch pipe are that coil obtains electric to pipe described in second group of control, each high-end switch pipe is connected with corresponding high-end drive circuit, and each low-end switch pipe is connected with corresponding low-side driver circuitry;
Characterized by further comprising: control respectively described first, second group to identical first, second group of the structure of pipe to pipe control circuit; Described first, second group all comprises pipe control circuit: comparator, control circuit, comparative level circuit;
The in-phase end of described comparator is connected with external control signal, and the output of this comparator is connected with the input of described control circuit, described low-side driver circuitry input respectively;
The output of described control circuit is connected with described comparative level circuit control input end;
The output of described comparative level circuit is connected with the end of oppisite phase of the comparator of another group;
Described comparator is suitable for, in the time of output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting;
Described control circuit is suitable in the time of described comparator output high level, control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and the output voltage that improves described comparative level circuit is greater than the input voltage of the in-phase end of the comparator of described another group; Or when described comparator output low level, control a described high-end drive circuit and make a corresponding high-end switch pipe cut-off;
Described comparative level circuit, is suitable for providing comparative voltage.
2. permanent magnetism coil driver according to claim 1, it is characterized in that: described control circuit comprises: first, second photoelectrical coupler, the negative electrode of described the first photoelectrical coupler, anode respectively with the corresponding connection of anode, negative electrode of the second photoelectrical coupler, and form first, second node; Described the first node is as the output of described control circuit, and described the second node is as the input of this control circuit; The emitter of described the first photoelectrical coupler is connected with the collector electrode of described the second photoelectrical coupler, and the emitter of described the second photoelectrical coupler is as corresponding floating ground end, and the collector electrode of described the first photoelectrical coupler is connected with driving power; The collector electrode of described the second photoelectrical coupler is also connected with the input of described high-end switch tube drive circuit; The earth terminal of described high-end switch tube drive circuit is connected with described floating ground end.
3. permanent magnetism coil driver according to claim 2, is characterized in that: the high-end drive circuit of described high-end switch pipe comprises: the 14 diode, the 15, the 16 resistance, the 3rd positive-negative-positive triode, the 13 voltage-stabiliser tube; The anode of described the 14 diode is connected with the base stage of the 3rd positive-negative-positive triode, one end of the 16 resistance, forms the input of described high-end switch tube drive circuit; The anode of the other end of described the 16 resistance, the collector electrode of the 3rd positive-negative-positive triode, 13 voltage-stabiliser tubes is connected with described floating ground end; The negative electrode of described the 14 diode is connected with the emitter of the 3rd positive-negative-positive triode, one end of the 15 resistance; The other end of described the 15 resistance is connected with the negative electrode of the 13 voltage-stabiliser tube, as the output of described high-end drive circuit, and be connected with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe is connected with the earth terminal of described high-end switch tube drive circuit.
4. permanent magnetism coil driver according to claim 1 and 2, is characterized in that: described comparative level circuit comprises: first, second, third, fourth resistance, first, second diode, the 6th electric capacity; One end of described the first resistance is connected with a power supply, and the other end is connected with one end of described second, third resistance, one end of the 6th electric capacity respectively, the other end ground connection of described the 6th electric capacity; The other end of described the second resistance is connected with the anode of described the first diode, one end of the 4th resistance, described the first node respectively; The other end of described the 3rd resistance is connected with the negative electrode of described the first diode, the negative electrode of the second diode, the end of oppisite phase of described comparator respectively; The other end of described the 4th resistance, the plus earth of described the second diode.
5. permanent magnetism coil driver according to claim 1, is characterized in that: described low side tube drive circuit comprises: six, the 7th resistance, the 3rd diode, a NPN type triode, the 4th voltage-stabiliser tube; Described the 6th one end of resistance and the output of described comparator are connected, the other end is connected with the anode of described the 3rd diode, the base stage of a NPN type triode, one end of a described emitter for NPN type triode and the negative electrode of the 3rd diode, described the 7th resistance is connected, and the other end of described the 7th resistance is connected with the negative electrode of the 4th voltage-stabiliser tube, the base stage of corresponding low-end switch pipe; The anode of described the 4th voltage-stabiliser tube, the grounded collector of a NPN type triode.
6. permanent magnetism coil driver according to claim 1, is characterized in that: the in-phase end of described comparator is connected with an input resistance, ground capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249490.XA CN102739213B (en) | 2012-07-18 | 2012-07-18 | Permanent magnetic coil driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249490.XA CN102739213B (en) | 2012-07-18 | 2012-07-18 | Permanent magnetic coil driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102739213A CN102739213A (en) | 2012-10-17 |
| CN102739213B true CN102739213B (en) | 2014-08-20 |
Family
ID=46994113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210249490.XA Expired - Fee Related CN102739213B (en) | 2012-07-18 | 2012-07-18 | Permanent magnetic coil driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102739213B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281067A (en) * | 2013-06-14 | 2013-09-04 | 成都锐奕信息技术有限公司 | False-operation resistant buffering port |
| CN103986448A (en) * | 2014-05-28 | 2014-08-13 | 苏州工业职业技术学院 | Drive inductor of refrigerator electromagnetic door |
| CN108258675B (en) * | 2018-03-29 | 2024-06-18 | 中国电子科技集团公司第四十三研究所 | Control circuit for double direct current power supply input |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147545A (en) * | 1994-03-08 | 2000-11-14 | Texas Instruments Incorporated | Bridge control circuit for eliminating shoot-through current |
| CN101515714A (en) * | 2008-02-22 | 2009-08-26 | 德信科技股份有限公司 | Kickback voltage suppression circuit |
| CN102460946A (en) * | 2009-04-04 | 2012-05-16 | 戴森技术有限公司 | Control of an electric machine |
-
2012
- 2012-07-18 CN CN201210249490.XA patent/CN102739213B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147545A (en) * | 1994-03-08 | 2000-11-14 | Texas Instruments Incorporated | Bridge control circuit for eliminating shoot-through current |
| CN101515714A (en) * | 2008-02-22 | 2009-08-26 | 德信科技股份有限公司 | Kickback voltage suppression circuit |
| CN102460946A (en) * | 2009-04-04 | 2012-05-16 | 戴森技术有限公司 | Control of an electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102739213A (en) | 2012-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102324835B (en) | Insulated gate bipolar transistor (IGBT) driving circuit | |
| CN102315632B (en) | Driving circuit for inhibiting over current of IGBT (Insulated Gate Bipolar Transistor) | |
| CN102215035A (en) | Alternating current mains supply isolation zero crossing checking circuit combined with low-voltage power line carrier wave communication signal coupling | |
| CN104269997B (en) | A kind of adjustable transformer isolation complementary drive circuit in dead band | |
| CN102737810B (en) | Working method of permanent magnet coil driving circuit | |
| CN205883036U (en) | Complementary drive circuit | |
| CN202260995U (en) | IGBT (Insulated Gate Bipolar Transistor) driving circuit | |
| CN102739213B (en) | Permanent magnetic coil driving circuit | |
| CN105898935A (en) | Anti-reverse connection and soft-starting circuit for LED drive power supply | |
| CN202696561U (en) | Permanent magnet coil driving circuit | |
| CN104635569B (en) | A kind of multimode sequential control circuit | |
| CN213426015U (en) | Drive circuit that transformer was kept apart | |
| CN109450232A (en) | The driving circuit of high-order metal-oxide-semiconductor | |
| CN108900076A (en) | Bridge driving circuit on inverter | |
| CN103368142B (en) | Direct current motor lock-rotor protection circuit and search lamp | |
| CN205647333U (en) | Motor speed regulating device and domestic appliance | |
| CN101409545B (en) | Overload protection circuit for switch type transistor | |
| CN103904874B (en) | A kind of time-delay soft start circuit for BOOST-PFC | |
| CN203206380U (en) | Starting control circuit, display panel driving circuit and display apparatus | |
| CN206524760U (en) | A kind of power initiation system for high withstand voltage eclipsed form DC DC converters | |
| CN106849926A (en) | A kind of pressure nmos switch control circuit wide | |
| CN209329961U (en) | A kind of power control circuit and electronic equipment | |
| CN210578247U (en) | Protection circuit and device | |
| CN203674737U (en) | Discharge protection device and battery management system thereof | |
| CN209151406U (en) | The protection circuit of low ripple LED control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 |