CN104953994B - A kind of drive circuit of power switch pipe - Google Patents
A kind of drive circuit of power switch pipe Download PDFInfo
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- CN104953994B CN104953994B CN201410124471.3A CN201410124471A CN104953994B CN 104953994 B CN104953994 B CN 104953994B CN 201410124471 A CN201410124471 A CN 201410124471A CN 104953994 B CN104953994 B CN 104953994B
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Abstract
A kind of drive circuit of power switch pipe, including：Control circuit, on-off circuit, transformer and DC voltage；Control circuit is connected with on-off circuit, controlling switch circuit turns on and off；At least one armature winding of on-off circuit and transformer is connected, and when on-off circuit is opened, voltage is provided to the armature winding；At least one secondary windings of transformer is connected with least one DC voltage, and the secondary windings and DC voltage after series connection are connected at least one power switch pipe；When on-off circuit turns off, the voltage that the secondary windings is obtained and the control terminal charge or discharge that the power switch pipe is given after DC voltage superposition so that the power switch pipe obtains control voltage, to control the power switch pipe to be switched on or off.Drive circuit loss is small, reliability is high, can be achieved to control the high-frequency switch of power switch pipe.
Description
Technical field
The present invention relates to electronic technology field, and in particular to the drive circuit of power switch pipe.
Background technology
Power conversion frequency more and more higher, the driving of power switch pipe, if using existing type of drive, meeting is lost
Become very big, be unfavorable for conversion efficiency raising, also reduce the reliability of driving chip.A kind of as shown in figure 1, work(for signal
The drive circuit block diagram of rate switching tube, driving chip driving power switching tube Q1 are switched on and off.As shown in Fig. 2 it is existing
The drive waveforms schematic diagram of driving chip, it is square wave, driving chip loss is big, especially when switching frequency is up to 1MHz, drives
Dynamic chip reliability is poor.
Therefore, it is necessary to improve a kind of drive circuit that the power switch pipe small, reliability is high is lost.
The content of the invention
The embodiment of the present invention provides a kind of drive circuit of power switch pipe, make it that the loss of drive circuit is small, reliable
Property it is high, realize the high-frequency switch of power switch pipe.
The present invention is that embodiment provides a kind of drive circuit of power switch pipe, including：Control circuit, on-off circuit,
Transformer and at least one first DC voltage；The control circuit is connected with the on-off circuit, the control circuit control
The on-off circuit turns on and off；The on-off circuit is connected with least one armature winding of the transformer, in institute
When stating on-off circuit and opening, the armature winding to the transformer provides voltage；
At least one secondary windings of the transformer is connected with least one first DC voltage, the change after series connection
The secondary windings of depressor and the first DC voltage are connected at least one first power switch pipe；
When the on-off circuit turns off, voltage and first direct current that the secondary windings of the transformer is obtained
Laminated add after give at least one first power switch pipe control terminal charge or discharge so that first power switch pipe
Control voltage is obtained, to control first power switch pipe to be switched on or off.
Preferably, the drive circuit of the power switch pipe, in addition to：At least one second DC voltage；
At least one armature winding of the transformer is connected with least one second DC voltage, the institute after series connection
The armature winding and the second DC voltage for stating transformer are connected to the second power switch pipe；
When the on-off circuit turns off, voltage that at least one armature winding of the transformer is obtained and described the
The control terminal charge or discharge of at least one second power switch pipe are given after the superposition of two DC voltages so that second work(
Rate switching tube obtains control voltage, to control second power switch pipe to be switched on or off.
Preferably, the on-off circuit is full-bridge switch topological circuit, half-bridge switch topological circuit, push-pull circuit or active
Clamp switch circuit.
Preferably, when the on-off circuit is switched on or off, the switching tube in the on-off circuit is ZVT.
Preferably, the magnetic core of the transformer opens air gap, and each winding for storing to the transformer provides voltage institute
The energy needed.
Preferably, the control circuit controls the on-off circuit periodically to turn on and off.
Preferably, first DC voltage is produced by the first offset generating circuit, first offset generating circuit point
It is not connected with the secondary windings of the transformer and first power switch pipe；
Wherein, first offset generating circuit includes first resistor R1, second resistance R2, diode D1 and the first electric capacity
Cb1, the first electric capacity Cb1 and first resistor R1 are in parallel, the first electric capacity Cb1 and first resistor R1 and the transformer
Secondary windings is connected, second resistance R2 and diode the D1 series connection, the second resistance R2, diode D1 and the described first electricity
Hold the secondary windings parallel connection of Cb1, first resistor R1, transformer, first DC voltage is the first electric capacity Cb1 both ends
Voltage；
By changing the proportionate relationship of the first resistor R1 and second resistance R2, the big of first DC voltage is adjusted
It is small.
Preferably, first DC voltage is produced by the second offset generating circuit, second offset generating circuit point
It is not connected with the secondary windings of the transformer and first power switch pipe, the first power switch pipe ground connection；
Wherein, second offset generating circuit includes 3rd resistor R3, the 4th resistance R4 and the second electric capacity Cb2, described
Second electric capacity Cb2 and 3rd resistor R3 is in parallel, the second electric capacity Cb2 and 3rd resistor R3 and the transformer secondary windings
Series connection, the 4th resistance R4 the first vertical compressions of connection source VCC, first DC voltage is the second electric capacity Cb2 both ends
Voltage；
By changing the proportionate relationship of the 3rd resistor R3 and the 4th resistance R4, the big of first DC voltage is adjusted
It is small.
Preferably, second DC voltage is produced by the 3rd offset generating circuit, the 3rd offset generating circuit point
It is not connected with the armature winding of the transformer and second power switch pipe, the second power switch pipe ground connection；
Wherein, the 3rd offset generating circuit includes the 5th resistance, the 6th resistance and the 3rd electric capacity, the 3rd electric capacity
With the 5th resistor coupled in parallel, the primary windings connected in series of the 3rd electric capacity and the 5th resistance and the transformer, the 6th resistance
The second vertical compression source is connected, second DC voltage is the voltage at the 3rd electric capacity both ends；
By changing the proportionate relationship of the 5th resistance and the 6th resistance, the size of second DC voltage is adjusted.
It can be seen that the drive circuit of power switch pipe provided in an embodiment of the present invention, during by controlling switch circuit debugging, give
The armature winding of transformer provides voltage, and when controlling switch circuit turns off, by the voltage that the secondary windings of transformer obtains with
DC voltage gives the control terminal charge or discharge of power switch pipe in the lump so that power switch pipe obtains control voltage, to open
Or switch-off power switching tube, because on-off circuit is ZVT, loss is very low, so as to improve the reliable of drive circuit
Property.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of drive circuit block diagram of power switch pipe of signal；
Fig. 2 is the drive waveforms schematic diagram of existing driving chip；
Fig. 3 is a kind of drive circuit of power switch pipe provided in an embodiment of the present invention；
Fig. 4 a are the drive circuit schematic diagram of a power switch pipe of example；
Fig. 4 b are the sequential of the switching voltage and drive signal voltage in the drive circuit of the power switch pipe of Fig. 4 a examples
Figure；
Fig. 5 is the drive circuit schematic diagram of another power switch pipe of example；
Fig. 6 is the drive circuit schematic diagram of another power switch pipe of example；
Fig. 7 is the drive circuit schematic diagram of another power switch pipe of example；
Fig. 8 is the drive circuit schematic diagram of another power switch pipe of example；
Fig. 9 is the drive circuit schematic diagram of another power switch pipe of example；
Figure 10 a are a DC voltage bias generation circuit schematic diagram in the drive circuit of the power switch pipe of example；
Figure 10 b are another DC voltage bias generation circuit signal in the drive circuit of the power switch pipe of example
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 3, it is a kind of drive circuit of power switch pipe provided in an embodiment of the present invention.The drive circuit bag
Include：Control circuit 1, on-off circuit 2 and transformer 3, and DC voltage V1V2V3V4.In figure 3, it is transformer T1.Control
Circuit 1 is connected with on-off circuit 2, and the controlling switch circuit 2 of control circuit 1 turns on and off；On-off circuit 2 and transformer 3
Armature winding L1 connections, when on-off circuit 2 is opened, the armature winding L1 to transformer 3 provides voltage.
The secondary windings of transformer is connected with DC voltage, and the secondary windings of the transformer after series connection connects with DC voltage
To power switch pipe.In figure 3, transformer has two secondary windings, is L2 and L3 respectively, each secondary windings and a direct current
Pressure series connection, secondary windings and DC voltage after series connection are connected to a power switch pipe, only illustrate secondary windings L2 in figure 3
Series direct current voltage V3, is then attached to power switch pipe Qp1.After secondary windings L3 series direct current voltages V4, it can also connect
To another power switch pipe (not shown in Fig. 3).
When on-off circuit 2 turns off, power switch pipe will be given after the secondary windings L2 voltages obtained and DC voltage superposition
Qp1 charge or discharge so that power switch pipe Qp1 control terminal obtains control voltage, to control power switch pipe Qp1 to open or
Shut-off.
Because in the dead time of switching tube, secondary windings and DC voltage give each power switch pipe control terminal charge and discharge
Electricity, power switch pipe is obtained control voltage, power switch pipe can be controlled to be switched on or off.Due to opening in on-off circuit
It is almost 0 to close the voltage born when pipe is switched on or off, will not produce switching loss, then the switching tube in drive circuit is realized
Sofe Switch or ZVT（Zero Voltage Switch, ZVS）.
Power switch pipe Qp1 can be metal oxide layer semiconductcor field effect transisto（Metal-Oxide-
Semiconductor Field-Effect Transistor,MOSFET）Or insulated gate bipolar transistor (Insulated
Gate Bipolar Transistor, IGBT) etc..For example, for MOSFET, during the dead band of the switching tube in on-off circuit
In, inductive current charges to each MOSFET input capacitance, and it is equal to be charged to voltage and the DC source VCC of electric capacity always, then needs
The voltage at the switching tube both ends in the on-off circuit to be opened is 0, now opens the switching tube, and switching tube will not produce switch damage
Consumption.
So that the drive circuit loss of the present embodiment is small, reliability is high, can be achieved to open the high-frequency of power switch pipe
Close control.
In the present embodiment, armature winding L1 can also be connected to another power switch after series direct current voltage V1 or V2
Pipe, the power switch pipe can also be given after voltage and the DC voltage superposition for obtaining armature winding when on-off circuit turns off
Charging so that the power switch pipe obtains control voltage, to control the power switch pipe to be switched on or off.
The magnetic core of transformer in the present embodiment opens air gap, and each winding for storing to transformer is provided needed for voltage
Energy.
In the present embodiment, the controlling switch circuit period property of control circuit 1 turns on and off, and energy is periodically in transformation
Circulated between device and the input capacitance of power switch pipe, with driving power switching tube；Meanwhile periodically given by on-off circuit
Transformer feeds energy, to maintain the drive signal voltage amplitude of power switch pipe not decay.
On-off circuit 2 can be that full-bridge switch topological circuit, half-bridge switch topological circuit, push-pull circuit or active clamp are opened
Powered-down road, this several on-off circuit is discussed in detail below by embodiment：
Fig. 4 a are referred to, are the drive circuit schematic diagram of a power switch pipe of example.In fig.4, Q1, Q2, Q3 and
Q4 composition full-bridge switch topologys.The drive signal of drive circuit is：Two signal complementations of Vgs11 and Vgs31, but between two signals
In the presence of certain dead band, i.e., now both are simultaneously low level；Two signal complementations of Vgs21 and Vgs41, but exist between two signals
Certain dead band, i.e., now both are simultaneously low level；Sequential differs half week Vgs11 and Vgs21 phases difference 180 degree in other words
Phase；Sequential differs half period to Vgs21 and Vgs41 phases difference 180 degree in other words.L1, L2 and L3 are closely coupled to each other, and are formed
Driving transformer, L1 are armature winding（Excitation）Winding, remaining is secondary windings.Secondary windings is in a unlimited number in 2, according to reality
The power switch number that border needs to drive specifically determines.Exciting Windings for Transverse Differential Protection both ends and each secondary windings, all connect a DC voltage.Entirely
Bridge switch by L1 to static exciter, output drive signal after transformer secondary output winding and DC voltage series connection（Vgs3~
Vgs4), the control pole of power switch is connected to, is switched with driving power.Exciting Windings for Transverse Differential Protection both ends, can also after series direct current voltage,
Output drive signal（Vgs1 and gs2), go driving power to switch.For the sake of simplicity, a power switch pipe has only been drawn in figure.C1
It is capacitance with C2.Properly, ZVS Sofe Switch can be achieved in magnetizing inductance amount and dead band.Switching voltage as shown in Figure 4 b
With the timing diagram of drive signal voltage, Vgs1~Vgs4 is respectively intended to driving power switching tube.Each signal has relatively slow side
Along speed so that the switching tube of drive circuit can realize ZVS, and loss is greatly reduced.
Referring to Fig. 5, the drive circuit schematic diagram of another power switch pipe for example.This figure field switch topology is
Half-bridge.Wherein, C1, C2 can also only connect one of them.The drive signal of drive circuit is Vgs11 and Vgs31, two signals it
Between certain dead band be present, i.e., now Q1, Q3 are all off state；Vgs11 and Vgs31 phases differ 180 degree sequential phase in other words
Poor half period；L1, L2 and L3 are closely coupled to each other, and form driving transformer, L1 is armature winding（Excitation）Winding, remaining is
Secondary windings.Secondary windings is in a unlimited number in 2, is specifically determined according to the power switch number for being actually needed driving.Each secondary
Winding, respectively connect a DC voltage.Q1, Q3 are switched by L1 to static exciter, transformer secondary output winding and DC voltage string
Output drive signal after connection（Vgs3~Vgs4), the control pole of power switch is connected to, is switched with driving power.Bridge arm midpoint electricity
Pressure, output drive signal, driving power can also be gone to switch after series direct current voltage.For the sake of simplicity, one has only been drawn in figure
Power switch pipe.Properly, ZVS Sofe Switch can be achieved in magnetizing inductance amount and dead band.
Referring to Fig. 6, the drive circuit schematic diagram of another power switch pipe for example.Vgs1~Vgs4 can distinguish
For driving power switching tube.The drive signal of drive circuit is Vgs31 and Vgs41, certain dead band be present between two signals,
I.e. now both Q3, Q4 are simultaneously off state；Sequential differs half week Vgs31 and Vgs41 phases difference 180 degree in other words
Phase；L1, L12, L2, L3 are closely coupled to each other, and form driving transformer, L1, L12 are armature winding（Excitation）Winding, remaining is
Secondary windings.Secondary windings is in a unlimited number in 2, is specifically determined according to the power switch number for being actually needed driving.Each secondary
Winding, respectively connect a DC voltage.Q3, Q4 are switched by L1, L12 to static exciter, transformer secondary output winding and direct current
Output drive signal after pressure series connection（Vgs3~Vgs4), the control pole of power switch is connected to, is switched with driving power.Q3, Q4's
Drain voltage, output drive signal, driving power can also be gone to switch after series direct current voltage.For the sake of simplicity, only drawn in figure
One power switch pipe.Properly, ZVS Sofe Switch can be achieved in magnetizing inductance amount and dead band.
Referring to Fig. 7, the drive circuit schematic diagram of another power switch pipe for example.Vgs3~Vgs4 is respectively intended to
Driving power switching tube.The drive signal of drive circuit is Vgs31 and Vgs41, certain dead band be present between two signals, i.e., this
When both Q3, Q31 be simultaneously off state；Sequential differs half period to Vgs31 and Vgs41 phases difference 180 degree in other words；
L1, L2, L3 are closely coupled to each other, and form driving transformer, L1 is armature winding（Excitation）Winding, remaining is secondary windings.It is secondary
Level number of windings is not limited to 2, is specifically determined according to the power switch number for being actually needed driving.Each secondary windings, respectively connects one
Individual DC voltage.Q3, Q31 are switched by L1 to static exciter, drive is exported after transformer secondary output winding and DC voltage series connection
Dynamic signal（Vgs3~Vgs4), the control pole of power switch is connected to, is switched with driving power.For the sake of simplicity, only drawn in figure
One power switch pipe.Properly, ZVS Sofe Switch can be achieved in magnetizing inductance amount and dead band.
Referring to Fig. 8, the drive circuit schematic diagram of another power switch pipe for example.Vgs3~Vgs4 is respectively intended to
Driving power switching tube.The drive signal of drive circuit is Vgs31 and Vgs41, certain dead band be present between two signals, i.e., this
When both Q3, Q31 be simultaneously off state；Sequential differs half period to Vgs31 and Vgs41 phases difference 180 degree in other words；
L1L2L3 is closely coupled to each other, and forms driving transformer, L1 is armature winding（Excitation）Winding, remaining is secondary windings.It is secondary
Number of windings is not limited to 2, is specifically determined according to the power switch number for being actually needed driving.Each secondary windings, respectively connect one
DC voltage.Q3, Q31 are switched by L1 to static exciter, output driving after transformer secondary output winding and DC voltage series connection
Signal（Vgs3~Vgs4), the control pole of power switch is connected to, is switched with driving power.For the sake of simplicity, one has only been drawn in figure
Individual power switch pipe.Properly, ZVS Sofe Switch can be achieved in magnetizing inductance amount and dead band.
Referring to Fig. 9, the drive circuit schematic diagram of another power switch pipe for example.Vgs3~Vgs4 is respectively intended to
Driving power switching tube.The drive signal of drive circuit is Vgs31.L1, L2, L3 are closely coupled to each other, and form driving transformer,
L1 is armature winding（Excitation）Winding, remaining is secondary windings.Secondary windings is in a unlimited number in 2, is driven according to being actually needed
Power switch number specifically determine.Each secondary windings, respectively connect a DC voltage.Q3 is switched by L1 to static exciter,
Output drive signal after transformer secondary output winding and DC voltage series connection（Vgs3~Vgs4), the control pole of power switch is connected to,
Switched with driving power.For the sake of simplicity, a power switch pipe has only been drawn in figure.Magnetizing inductance amount and dead band properly,
ZVS Sofe Switch can be achieved.Wherein, C1, C2 can also only with one, or even one without.
The DC voltage of drive circuit series connection in above-described embodiment can be produced by offset generating circuit.Such as Figure 10 a
It is shown, be example power switch pipe drive circuit in a DC voltage bias generation circuit schematic diagram, in winding and
Increase by tetra- devices of D1, R2, R1 and Cb1 between Qp1, you can DC voltage needed for being obtained on electric capacity Cb1.Electric capacity Cb1 and electricity
It is in parallel to hinder R1, electric capacity Cb1 and resistance R1 connect with the secondary windings of transformer, resistance R2 and diode D1 series connection, resistance R2, two
Pole pipe D1 is in parallel with the secondary windings of the electric capacity Cb1, resistance R1, transformer, and DC voltage is the electric capacity Cb1 both ends
Voltage.Required voltage swing can be adjusted by changing the proportionate relationship of two resistance of R1 and R2.
As shown in fig. lob, electricity is produced for another DC voltage bias in the drive circuit of the power switch pipe of example
Road schematic diagram, in the case of power switch pipe is grounded, it is not necessary to DC voltage is obtained by diode rectification, directly from vertical compression
Source VCC is obtained.Specifically, offset generating circuit includes resistance R3, resistance R4 and electric capacity Cb2, and electric capacity Cb2 and resistance R3 are simultaneously
Connection, electric capacity Cb2 and resistance R3 connect with the secondary windings of transformer, and resistance R4 connection DC source VCC, DC voltage is electric capacity
The voltage at Cb2 both ends, by changing resistance R3 and resistance R4 proportionate relationship, adjust the size of the first DC voltage.
Similarly, in the circuit of armature winding connection power switch pipe, its DC voltage can also be with shown in similar Figure 10 b
DC voltage bias generation circuit produces, and will not be repeated here.
Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly
Enclose, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (9)
- A kind of 1. drive circuit of power switch pipe, it is characterised in that including：Control circuit, on-off circuit, transformer and at least One the first DC voltage；The control circuit is connected with the on-off circuit, and the control circuit controls the on-off circuit Turn on and off；The on-off circuit is connected with least one armature winding of the transformer, is opened in the on-off circuit When logical, the armature winding to the transformer provides voltage；At least one secondary windings of the transformer is connected with least one first DC voltage, the transformer after series connection Secondary windings and the first DC voltage be connected at least one first power switch pipe；The voltage for obtaining the secondary windings of the transformer when the on-off circuit turns off and the first direct current laminated The control terminal charge or discharge of at least one first power switch pipe are given after adding so that first power switch pipe obtains Control voltage, to control first power switch pipe to be switched on or off.
- 2. the drive circuit of power switch pipe as claimed in claim 1, it is characterised in that also include：At least one second is straight Flow voltage；At least one armature winding of the transformer is connected with least one second DC voltage, the change after series connection The armature winding of depressor and the second DC voltage are connected to the second power switch pipe；When the on-off circuit turns off, voltage that at least one armature winding of the transformer is obtained and described second straight The control terminal charge or discharge of at least one second power switch pipe are given after stream voltage superposition so that second power is opened Close pipe and obtain control voltage, to control second power switch pipe to be switched on or off.
- 3. the drive circuit of power switch pipe as claimed in claim 2, it is characterised in that the on-off circuit is full-bridge switch Topological circuit, half-bridge switch topological circuit, push-pull circuit or active clamp on-off circuit.
- 4. the drive circuit of power switch pipe as claimed in claim 3, it is characterised in that when the on-off circuit is opened or is closed When disconnected, first power switch pipe and second power switch pipe are ZVT.
- 5. the drive circuit of power switch pipe as claimed in claim 4, it is characterised in that the magnetic core of the transformer opens gas Gap, each winding for storing to the transformer provide the energy needed for voltage.
- 6. the drive circuit of power switch pipe as claimed in claim 4, it is characterised in that opened described in the control circuit control Powered-down road periodically turns on and off.
- 7. the drive circuit of power switch pipe as claimed in claim 1, it is characterised in that first DC voltage is by first Offset generating circuit produces, first offset generating circuit secondary windings with the transformer and first power respectively Switching tube connects；Wherein, first offset generating circuit includes first resistor R1, second resistance R2, diode D1 and the first electric capacity Cb1, The first electric capacity Cb1 and first resistor R1 are in parallel, the first electric capacity Cb1 and first resistor R1 and the transformer secondary Windings in series, second resistance R2 and diode the D1 series connection, the second resistance R2, diode D1 and first electric capacity Cb1, first resistor R1, the secondary windings of transformer are in parallel, and first DC voltage is the first electric capacity Cb1 both ends Voltage；By changing the proportionate relationship of the first resistor R1 and second resistance R2, the size of first DC voltage is adjusted.
- 8. the drive circuit of power switch pipe as claimed in claim 1, it is characterised in that first DC voltage is by second Offset generating circuit produces, second offset generating circuit secondary windings with the transformer and first power respectively Switching tube connects, the first power switch pipe ground connection；Wherein, second offset generating circuit includes 3rd resistor R3, the 4th resistance R4 and the second electric capacity Cb2, and described second Electric capacity Cb2 and 3rd resistor R3 is in parallel, the second electric capacity Cb2 and 3rd resistor R3 and the transformer secondary windings string Connection, the 4th resistance R4 the first vertical compressions of connection source VCC, first DC voltage is the second electric capacity Cb2 both ends Voltage；By changing the proportionate relationship of the 3rd resistor R3 and the 4th resistance R4, the size of first DC voltage is adjusted.
- 9. the drive circuit of power switch pipe as claimed in claim 2, it is characterised in that second DC voltage is by the 3rd Offset generating circuit produces, the 3rd offset generating circuit armature winding with the transformer and second power respectively Switching tube connects, the second power switch pipe ground connection；Wherein, the 3rd offset generating circuit includes the 5th resistance, the 6th resistance and the 3rd electric capacity, the 3rd electric capacity and Five resistor coupled in parallel, the primary windings connected in series of the 3rd electric capacity and the 5th resistance and the transformer, the 6th resistance connection Second vertical compression source, second DC voltage are the voltage at the 3rd electric capacity both ends；By changing the proportionate relationship of the 5th resistance and the 6th resistance, the size of second DC voltage is adjusted.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124471.3A CN104953994B (en) | 2014-03-29 | 2014-03-29 | A kind of drive circuit of power switch pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124471.3A CN104953994B (en) | 2014-03-29 | 2014-03-29 | A kind of drive circuit of power switch pipe |
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| Publication Number | Publication Date |
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| CN104953994A CN104953994A (en) | 2015-09-30 |
| CN104953994B true CN104953994B (en) | 2018-01-09 |
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| CN201410124471.3A Active CN104953994B (en) | 2014-03-29 | 2014-03-29 | A kind of drive circuit of power switch pipe |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963066A (en) * | 1997-03-31 | 1999-10-05 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor device which drives low-voltage driven switching device, using low-voltage direct current power source, a diode and a capacitor |
| CN101060285A (en) * | 2007-03-16 | 2007-10-24 | 华为技术有限公司 | A system and method for realizing the isolation of high frequency switch DC-DC conversion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4696554B2 (en) * | 2004-09-07 | 2011-06-08 | 富士電機ホールディングス株式会社 | Signal transmission method to gate drive circuit |
-
2014
- 2014-03-29 CN CN201410124471.3A patent/CN104953994B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963066A (en) * | 1997-03-31 | 1999-10-05 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor device which drives low-voltage driven switching device, using low-voltage direct current power source, a diode and a capacitor |
| CN101060285A (en) * | 2007-03-16 | 2007-10-24 | 华为技术有限公司 | A system and method for realizing the isolation of high frequency switch DC-DC conversion |
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| Publication number | Publication date |
|---|---|
| CN104953994A (en) | 2015-09-30 |
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