CN111654120A - Wireless power transmission system based on metamaterial - Google Patents
Wireless power transmission system based on metamaterial Download PDFInfo
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- CN111654120A CN111654120A CN202010412622.0A CN202010412622A CN111654120A CN 111654120 A CN111654120 A CN 111654120A CN 202010412622 A CN202010412622 A CN 202010412622A CN 111654120 A CN111654120 A CN 111654120A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
- H02J50/502—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices the energy repeater being integrated together with the emitter or the receiver
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Abstract
The invention discloses a wireless power transmission system based on metamaterials, which comprises: a transmitting unit, a relay unit and a receiving unit; the transmitting unit comprises a power supply circuit, a transmitting rectifying circuit, a filter circuit, an inverter circuit, a transmitting compensation circuit, a transmitting control circuit and a transmitting ring; the relay unit comprises a relay coil and a relay compensation circuit; the receiving unit comprises a receiving coil, a receiving rectification circuit, a receiving compensation circuit, a receiving control circuit and a power grid load. According to the technical scheme, the power transmission to a remote place in a wireless mode is realized.
Description
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission system based on metamaterials.
Background
In recent years, with the increase in use of electronic products such as mobile phones and electric vehicles, wireless charging technology has received more and more attention. Compared with the traditional wired charging mode, the wireless charging mode has the unique advantages of portability, safety and the like. At the end of the 19 th century, Tesla proposed a guess at wireless power transmission. For over a century thereafter, research on wireless power transmission has never been stopped, and until 2007, Marin et al, the american college of labor and technology, proposed magnetic coupling resonant wireless power transmission, illuminating a 60 watt light bulb at a distance of two meters. This has caused the research on wireless power transmission to regain wide attention.
At present, the establishment of ubiquitous power internet of things has become a great hot direction for power research, and power systems are developing in the direction of intellectualization and greening. The current common mode of power transmission is overhead line power transmission, and the mode of power transmission needs to erect a long-distance power transmission line and a plurality of power transmission towers between two places for power transmission, which needs to consume a large amount of funds. Moreover, in some areas with severe environments, such as the Tibet plateau area and the islands far from the continents, the damage of the wires can easily occur whether the overhead wires or the cables are used. Therefore, wireless power transmission technology that does not require wires for power transmission is the best approach to address power transmission in these areas. However, the transmission distance realized by the existing wireless power transmission technology is small, generally tens of centimeters, which is far from meeting the requirement of wireless power transmission,
therefore, in order to further increase the transmission distance and the transmission efficiency, a wireless power transmission system is required.
Disclosure of Invention
The technical scheme of the invention provides a wireless power transmission system based on metamaterials, so as to improve the transmission efficiency of wireless power transmission.
In order to solve the above problems, the present invention provides a metamaterial-based wireless power transmission system, the system including: a transmitting unit, a relay unit and a receiving unit; the transmitting unit comprises a power supply circuit, a transmitting rectifying circuit, a filter circuit, an inverter circuit, a transmitting compensation circuit, a transmitting control circuit and a transmitting ring; the relay unit comprises a relay coil and a relay compensation circuit; the receiving unit comprises a receiving coil, a receiving rectifying circuit, a receiving compensating circuit, a receiving control circuit and a power grid load;
the power supply circuit of the transmitting unit inputs alternating current in a power grid into the transmitting rectifying circuit, the alternating current is converted into direct current through the transmitting rectifying circuit, and the direct current output by the transmitting rectifying circuit is input into the inverter circuit through the filter circuit;
the inverter circuit converts the input direct current into high-frequency alternating current to a transmitting coil through a transmitting compensation circuit under the control of the transmitting control circuit; transmitting the high-frequency alternating current to a relay coil and a relay compensation circuit through a transmitting coil;
compensating the transmitting coil through the magnetic coupling of the relay coil and the relay compensation circuit, so that the transmitting coil is matched with the receiving coil; the relay coils are multiple and adjacent relay coils are coupled in pairs;
the relay coil sends the high-frequency alternating current to the receiving coil and the receiving compensation circuit;
the receiving coil and the receiving compensation circuit input the received high-frequency alternating current sent by the relay coil into a receiving rectification circuit, and send the rectified direct current to a power grid load through receiving rectification current;
the receiving control circuit is used for controlling a switching tube of the receiving rectification circuit.
Preferably, the inverter circuit comprises an auxiliary network comprising an inductance LaA first capacitor Ca1A second capacitor Ca2A first auxiliary diode VDa1The second auxiliary diodeTube VDa2(ii) a The first auxiliary diode VDa1And the second auxiliary diode VDa2Are connected in series; the first capacitor Ca1Is connected to the first auxiliary diode VDa1Two ends; the second capacitor Ca2Is connected to a second auxiliary diode VDa2Two ends; the first capacitor Ca1And said second capacitance Ca2Are connected in series; the inductance LaA first terminal and the first capacitor Ca1And said second capacitance Ca2Are connected with the connecting line between, the inductance LaA second terminal and the first auxiliary diode VDa1And the second auxiliary diode VDa2The connecting lines are connected; the inductance LaAnd the third end is connected with the point B of the inverter circuit.
Preferably, when the fourth switch tube Q of the inverter circuit4When the circuit is turned off, the primary current i of the inverter circuitPAnd auxiliary network inductor current iLaSimultaneously flows into the point B; when the second switch tube Q of the inverter circuit2When the circuit is turned off, the primary current i of the inverter circuitPAnd auxiliary network inductor current iLaSimultaneously flowing out of the point B; primary current i of the inverter circuitPAnd auxiliary network inductor current iLaThe superposed capacitors are simultaneously supplied to a second switch tube capacitor C of a lag bridge arm of the inverter circuit2And a fourth switch tube capacitor C4Charging and discharging; the auxiliary network realizes a first switch tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4Zero voltage clamp.
Preferably, the inverter circuit includes: first switch tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4(ii) a First secondary tube VD1A second diode VD2A third diode VD3A fourth diode VD4
The first switch tube Q1Two ends of the first secondary tube VD are connected in an anti-parallel mode1；
The second switch tube Q2Two ends are connected in anti-parallelThe second diode VD2；
The third switch tube Q3The two ends of the third diode VD are connected in an anti-parallel mode3；
The fourth switch tube Q4The two ends of the fourth diode VD are connected in an anti-parallel mode4。
Preferably, the second switch tube Q of the auxiliary network2Or a fourth switching tube Q4On switching, the auxiliary network inductor current iLaIs the maximum value.
Preferably, the inverter circuit is wired in parallel.
Preferably, the transmitting rectifying circuit is a single-phase bridge type uncontrolled rectifying circuit.
The technical scheme of the invention overcomes the defects of the existing wired power transmission system, realizes long-distance power transmission under severe conditions, provides a wireless power transmission system based on metamaterials, and can realize remote power transmission in a wireless mode.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a circuit topology diagram of a wireless power transmission system according to a preferred embodiment of the present invention; and
fig. 2 is a topology diagram of an adaptive inverter circuit according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a circuit topology diagram of a wireless power transmission system according to a preferred embodiment of the present invention. In order to overcome the defects of the existing wired power transmission system and realize long-distance power transmission under severe conditions, the invention provides a wireless power transmission system based on a metamaterial, which can realize wireless power transmission to a long distance. To achieve the intended objective, embodiments of the present invention primarily include three parts, a transmitting unit, a relaying unit, and a receiving unit. The transmitting unit comprises a power supply circuit, a transmitting rectifying circuit, a filter circuit, an inverter circuit, a transmitting compensation circuit, a transmitting control circuit and a transmitting coil; the relay unit comprises a relay coil and a relay compensation circuit; the receiving unit comprises a receiving coil, a receiving rectification circuit, a receiving control circuit and a power grid load. The circuit topology of the wireless power transmission system is shown in fig. 1.
The invention provides a system for wireless power transmission, the system comprising: a transmitting unit, a relay unit and a receiving unit; the transmitting unit comprises a power supply circuit, a transmitting rectifying circuit, a filter circuit, an inverter circuit, a transmitting compensation circuit, a transmitting control circuit and a transmitting ring; the relay unit comprises a relay coil and a relay compensation circuit; the receiving unit comprises a receiving coil, a receiving rectification circuit, a receiving compensation circuit, a receiving control circuit and a power grid load.
The power supply circuit of the transmitting unit inputs alternating current in a power grid into the transmitting rectification circuit, the alternating current is converted into direct current through the transmitting rectification circuit, and the direct current output by the transmitting rectification circuit is input into the inverter circuit through the filter circuit.
The direct current input by the inverter circuit is converted into high-frequency alternating current to the transmitting coil by the transmitting compensation circuit under the control of the transmitting control circuit; the high-frequency alternating current is transmitted to the relay coil and the relay compensation circuit through the transmitting coil.
Compensating the transmitting coil through the magnetic coupling of the relay coil and the relay compensation circuit, so that the transmitting coil is matched with the receiving coil; the relay coils are multiple and adjacent relay coils are coupled two by two.
The relay coil transmits the high-frequency alternating current to the receiving coil and the reception compensation circuit.
The receiving coil and the receiving compensation circuit input the received high-frequency alternating current sent by the relay coil into a receiving rectification circuit, and send the rectified direct current to a power grid load through receiving rectification current;
the receiving control circuit is used for controlling a switching tube of the receiving rectification circuit.
Preferably, the inverter circuit comprises an auxiliary network comprising an inductance LaA first capacitor Ca1A second capacitor Ca2A first auxiliary diode VDa1A second auxiliary diode VDa2(ii) a First auxiliary diode VDa1And a second auxiliary diode VDa2Are connected in series; a first capacitor Ca1Is connected to the first auxiliary diode VDa1Two ends; second capacitor Ca2Is connected to a second auxiliary diode VDa2Two ends; a first capacitor Ca1And a second capacitor Ca2Are connected in series; inductor LaA first terminal and a first capacitor Ca1And a second capacitor Ca2Connected with each other by a connecting line, an inductance LaA second terminal and a first auxiliary diode VDa1And a second auxiliary diode VDa2The connecting lines are connected; inductor LaThe third end is connected with the point B of the inverter circuit.
Preferably, when the fourth switch tube Q of the inverter circuit4Primary current i of inverter circuit when turning offPAnd auxiliary network inductor current iLaSimultaneously flows into the point B; when the second switch tube Q of the inverter circuit2Primary current i of inverter circuit when turning offPAnd auxiliary network inductor current iLaSimultaneously flowing out of the point B; primary current i of inverter circuitPAnd auxiliary network inductor current iLaThe superposed capacitors simultaneously supply the capacitors C of the second switching tubes of the lag bridge arms of the inverter circuit2And a fourth switch tube capacitor C4Charging and discharging; auxiliary network implementing a first switchTube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4Zero voltage clamp.
Preferably, the inverter circuit includes: first switch tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4(ii) a First secondary tube VD1A second diode VD2A third diode VD3A fourth diode VD4
First switch tube Q1Two ends are anti-parallel connected with a first secondary tube VD1；
Second switch tube Q2Two ends of the second diode VD are connected in anti-parallel2；
Third switch tube Q3Two ends of the third diode VD are connected in anti-parallel3；
Fourth switch tube Q4Two ends of the fourth diode VD are connected in anti-parallel4。
Preferably, the second switch tube Q of the auxiliary network2Or a fourth switching tube Q4Auxiliary network inductor current i during switchingLaIs the maximum value.
Preferably, the inverter circuit is wired in parallel.
Preferably, the transmitting rectifying circuit is a single-phase bridge type uncontrolled rectifying circuit.
In the invention, the primary side emission rectifying circuit is a single-phase bridge type uncontrolled rectifying circuit and is composed of four power diodes DF1、DF2、DF3、DF4Forming a rectifier bridge. An alternating current power supply in a power grid is connected into a rectification circuit, alternating current can be converted into direct current, and the direct current is transmitted into an inverter circuit through an LC filter circuit.
The inverter circuit comprises four switching tubes IGBT, Q1、Q2、Q3、Q4And a diode VD connected in anti-parallel at its two ends1、VD2、VD3、VD4The direct current flows into the inverter circuit and then is converted into alternating current which flows into the next stage.
The transmission compensation circuit adopts LLC topology, Lr、Tr1、La、Ca1Form a series resonance, Lr、Tr1、La、Ca2Series resonance is also formed.
The relay compensation circuit adopts S-type compensation topology, CS(k)、FS(k)，k∈[0，n]And in series resonance, the transmitting end coil is coupled with the relay coil 1, the relay coil 1 is simultaneously coupled with the relay coil 2, the relay coil 2 is simultaneously coupled … … with the relay coil 3, and the like.
Finally, the nth relay coil is coupled with the receiving coil, meanwhile, the receiving end also has a receiving compensation circuit with S-shaped topology, the receiving part consists of a receiving compensation circuit and a receiving rectification circuit, and the receiving rectification circuit consists of a DS1、DS2、DS3、DS4The four power diodes are similar to the transmitting unit and are also single-phase uncontrolled bridge rectifier circuits. The receiving rectification circuit is connected to a load through a filter circuit.
The whole system needs to maintain a coupling state to realize high-efficiency wireless power transmission, taking an emission compensation circuit as an example, Lr、Tr1、La、Ca1In a series resonance state, Lr、Tr1、La、Ca2In the series resonance state, the parameters of L, C need to be strictly controlled.
Considering that different conditions such as heavy load, light load, no load and the like often occur in a power system, an inverter of a wireless power transmission system must meet the requirement of Zero Voltage Switching (ZVS) in a wide load range. Generally, a phase-shifted full-bridge inverter is adopted in a wireless power transmission system, and the traditional phase-shifted full-bridge inverter has the problem that ZVS is difficult to realize in a lagging arm, so that the requirement of a wide load working range cannot be met. Therefore, the inverter circuit is further modified, and the self-adaptive inverter circuit suitable for wireless power transmission is invented and can meet the requirement of wide output.
In the existing phase-shifted full-bridge inverter, the switching-on and switching-off of a switching tube are realized by charging and discharging of a capacitor connected in parallel with the switching tube. To realize zero voltage turn-on, it must be satisfied that the switch tube releases the charge in the capacitor to zero before turning on. The invention adds an auxiliary network in the prior phase-shifting bridge inverter circuit. The current of the lagging arm during switching is increased by utilizing the energy storage and release of the auxiliary network, the charging and discharging processes of the parallel capacitor of the lagging arm are accelerated, zero-voltage clamping of a switching tube is realized, ZVS is further realized, and the soft switching capacity of the lagging arm is improved.
Compared with the traditional phase-shifting inverter, the self-adaptive phase-shifting full-bridge inverter main circuit has the advantage that the inductance L is increasedaCapacitor Ca1And Ca2Diode VDa1And VDa2And forming an auxiliary network. When Q is4At turn-off, primary current iPAnd auxiliary network inductor current iLaSimultaneously flows into the point B; when Q is2When turned off, iPAnd iLaFlows out of point B at the same time, and is therefore at the switching tube Q2And Q4When the bridge is switched on and switched off, primary current and auxiliary network inductive current flow out of or into a node B at the same time, the two currents are mutually superposed, and the two currents simultaneously supply a junction capacitor C of a switch tube of a lagging bridge arm2、C4And the converter is charged and discharged, so that all charges of the tube junction capacitor (or parallel capacitor) are extracted/filled before the on/off signal of the switching tube arrives even if the converter works under the condition of light load, and the zero-voltage on/off is realized. The adaptive inverter circuit topology is shown in fig. 2.
From the above analysis, it can be derived that the operating principle of the adaptive inverter is:
1) auxiliary inductor current i during switching of lagging armLaAt a maximum, into or out of node B, helping to achieve zero voltage switching of the lagging leg.
2) The auxiliary network capacitor and the diode do not participate in the switching process of the hysteresis arm switching tube, and only the auxiliary network inductor establishes the maximum current of the auxiliary inductor.
Meanwhile, the high-frequency inverter is also found to generate irregular peaks in practice, and the quality of electric energy is affected. The reason for the high-frequency inverter to generate the spike interference is analyzed as follows:
1) fast switching may reduce switching losses, but the higher du/dt on the MOSFET drain. Due to the existence of circuit parasitic parameters, the inverter driving waveform can generate larger peak interference, and further the MOSFET is switched on by mistake when a normal gate trigger signal does not exist, so that potential safety hazards are brought to the system.
2) When the on-off current of the inverter is large, the fast switching can cause the current of a switching tube to generate large di/dt, and under the action of stray parameters of a line, large peak voltage is generated, so that the normal work of the MOSFET is threatened.
3) When the MOSFET is switched without ZVS, the transient discharge of the parallel capacitor also produces a high di/dt, resulting in a voltage spike.
In order to suppress the spike disturbances caused by high du/dt and high di/dt, their influence on the system can be eliminated by a series of measures.
1) The inverter adopts parallel layout wiring, and stray parameters of the circuit are reduced. The voltage spike of the drain-source electrode of the MOSFET is mainly generated under the action of high di/dt under the action of stray inductance, and the peak value of the voltage spike is Ldi/dt if the stray inductance is L, so that the voltage spike can be effectively reduced by reducing the stray inductance.
2) And the driving resistor is reasonably designed. The magnitude of the drive resistor directly affects the rising and falling speed of the drive waveform, and thus the switching speed of the MOSFET. Switching MOSFETs quickly can reduce losses but also increase du/dt and di/dt problems. When the system peak is large, the value of the driving resistor can be properly increased, the turn-on of the MOSFET is delayed, and the system peak interference is obviously reduced. However, reducing the switching tube speed also increases the switching loss, so the design of the driving circuit parameters needs to take both of these two issues into consideration. When the system is used for designing the driving resistor, the diode is connected in series with the driving resistor branch to control the current direction, and the on-off resistance of the driving circuit is changed, so that the aims of delaying the on-off and rapid off of the switching tube are fulfilled.
3) The impedance matching circuit design reduces the switch-off current. The impedance of the inverter in a wide output range of a system can be influenced by designing the impedance matching circuit at the output end of the inverter, so that the equivalent load value of the inverter can be improved and the output current of the inverter can be reduced by improving the parameters of the impedance matching circuit.
The invention provides a wireless power transmission system and a self-adaptive phase-shifting bridge inverter circuit based on an electromagnetic metamaterial. Meanwhile, in order to improve the transmission quality of the wireless power transmission system under different load conditions, a novel inverter circuit is also provided, and the performance of inversion is improved by adding an auxiliary network. In order to further improve the quality of the electric energy after inversion, three methods for inhibiting voltage and current spikes are also provided.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (7)
1. A metamaterial-based wireless power transmission system, the system comprising: a transmitting unit, a relay unit and a receiving unit; the transmitting unit comprises a power supply circuit, a transmitting rectifying circuit, a filter circuit, an inverter circuit, a transmitting compensation circuit, a transmitting control circuit and a transmitting ring; the relay unit comprises a relay coil and a relay compensation circuit; the receiving unit comprises a receiving coil, a receiving rectifying circuit, a receiving compensating circuit, a receiving control circuit and a power grid load;
the power supply circuit of the transmitting unit inputs alternating current in a power grid into the transmitting rectifying circuit, the alternating current is converted into direct current through the transmitting rectifying circuit, and the direct current output by the transmitting rectifying circuit is input into the inverter circuit through the filter circuit;
the inverter circuit converts the input direct current into high-frequency alternating current to a transmitting coil through a transmitting compensation circuit under the control of the transmitting control circuit; transmitting the high-frequency alternating current to a relay coil and a relay compensation circuit through a transmitting coil;
compensating the transmitting coil through the magnetic coupling of the relay coil and the relay compensation circuit, so that the transmitting coil is matched with the receiving coil; the relay coils are multiple and adjacent relay coils are coupled in pairs;
the relay coil sends the high-frequency alternating current to the receiving coil and the receiving compensation circuit;
the receiving coil and the receiving compensation circuit input the received high-frequency alternating current sent by the relay coil into a receiving rectification circuit, and send the rectified direct current to a power grid load through receiving rectification current;
the receiving control circuit is used for controlling a switching tube of the receiving rectification circuit.
2. The system of claim 1, the inverter circuit comprising an auxiliary network comprising an inductance LaA first capacitor Ca1A second capacitor Ca2A first auxiliary diode VDa1A second auxiliary diode VDa2(ii) a The first auxiliary diode VDa1And the second auxiliary diode VDa2Are connected in series; the first capacitor Ca1Is connected to the first auxiliary diode VDa1Two ends; the second capacitor Ca2Is connected to a second auxiliary diode VDa2Two ends; the first capacitor Ca1And said second capacitance Ca2Are connected in series; the inductance LaA first terminal and the first capacitor Ca1And said second capacitance Ca2Are connected with the connecting line between, the inductance LaA second terminal and the first auxiliary diode VDa1And the second auxiliary diode VDa2The connecting lines are connected; the inductance LaThird terminalAnd is connected with the point B of the inverter circuit.
3. The system of claim 1, wherein Q is the fourth switch transistor of the inverter circuit4When the circuit is turned off, the primary current i of the inverter circuitPAnd auxiliary network inductor current iLaSimultaneously flows into the point B; when the second switch tube Q of the inverter circuit2When the circuit is turned off, the primary current i of the inverter circuitPAnd auxiliary network inductor current iLaSimultaneously flowing out of the point B; primary current i of the inverter circuitPAnd auxiliary network inductor current iLaThe superposed capacitors are simultaneously supplied to a second switch tube capacitor C of a lag bridge arm of the inverter circuit2And a fourth switch tube capacitor C4Charging and discharging; the auxiliary network realizes a first switch tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4Zero voltage clamp.
4. The system of claim 1, the inverter circuit comprising: first switch tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4(ii) a First secondary tube VD1A second diode VD2A third diode VD3A fourth diode VD4
The first switch tube Q1Two ends of the first secondary tube VD are connected in an anti-parallel mode1；
The second switch tube Q2The two ends are connected with the second diode VD in an anti-parallel mode2；
The third switch tube Q3The two ends of the third diode VD are connected in an anti-parallel mode3；
The fourth switch tube Q4The two ends of the fourth diode VD are connected in an anti-parallel mode4。
5. The system of claim 1, a second switching tube Q of the auxiliary network2Or a fourth switching tube Q4On switching, the auxiliary network inductor current iLaIs the maximum value.
6. The system of claim 1, the inverter circuit being wired in parallel layout.
7. The system of claim 1, the transmit rectification circuit being a single phase bridge uncontrolled rectification circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112140916A (en) * | 2020-10-15 | 2020-12-29 | 中国科学院电工研究所 | Non-contact charging system for electric automobile |
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| CN106452080A (en) * | 2016-09-12 | 2017-02-22 | 中国科学院电工研究所 | Wireless charging inverter for electric vehicle |
| CN107148718A (en) * | 2014-11-17 | 2017-09-08 | 株式会社村田制作所 | Wireless power supply system |
| CN111030266A (en) * | 2019-12-25 | 2020-04-17 | 东南大学 | Wireless charging system based on electromagnetic metamaterial and constant-current constant-voltage charging control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148718A (en) * | 2014-11-17 | 2017-09-08 | 株式会社村田制作所 | Wireless power supply system |
| CN106452080A (en) * | 2016-09-12 | 2017-02-22 | 中国科学院电工研究所 | Wireless charging inverter for electric vehicle |
| CN111030266A (en) * | 2019-12-25 | 2020-04-17 | 东南大学 | Wireless charging system based on electromagnetic metamaterial and constant-current constant-voltage charging control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112140916A (en) * | 2020-10-15 | 2020-12-29 | 中国科学院电工研究所 | Non-contact charging system for electric automobile |
| CN112140916B (en) * | 2020-10-15 | 2022-04-19 | 中国科学院电工研究所 | Non-contact charging system for electric automobile |
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Application publication date: 20200911 |