CN112564307B - A circuit topology control method of magnetic parallel transmitter in dynamic wireless power supply system - Google Patents

Abstract

The present invention provides a multi-module magnetic parallel transmitter circuit topology for a high-power dynamic wireless power supply system for an electric vehicle. The transmitter circuit topology specifically includes an inverter source and a primary side module; the inverter source includes a low-frequency rectification filter module and n high-frequency inverter modules, the low-frequency rectification and filter modules are connected to the power grid, and the n high-frequency inverter modules are connected in parallel on the DC bus on the output side of the low-frequency rectification and filter modules; the n compensation The topology and the n primary coils independently perform resonant frequency matching, and the n primary coils are magnetically connected in parallel and integrated into a group of primary coils, and are coupled with the secondary coils to realize wireless power transmission; the invention solves the problem of existing dynamic wireless power supply The system is highly dependent on a single high-frequency inverter source and a high-frequency AC bus, which improves the shortcomings of low transmission efficiency, large primary system size, poor safety and economy.

Description

A circuit topology control method of magnetic parallel transmitter in dynamic wireless power supply system

technical field

The invention relates to the field of wireless power supply, in particular to a circuit topology of a multi-module magnetic parallel transmitting end of a high-power dynamic wireless power supply system for an electric vehicle and a control method thereof.

Background technique

At present, the energy conversion circuit solutions at the receiving end of high-power dynamic wireless power supply systems on the market generally have the following problems:

The basic structure of the dynamic wireless power supply system is shown in Figure 1, which is divided into two parts: the primary side system (ground part) and the secondary side system (vehicle part). As shown in Figure 2, there are mainly three forms of series power distribution, parallel power distribution and secondary coupling power distribution. Among them, the series power distribution topology expands the primary-side modules of each group, that is, the primary-side coil (primary-side magnetic coupling mechanism) and the resonant compensation network in series; the primary-side modules are laid sequentially on the ground section, and the secondary-side coil Coupling with the corresponding group or adjacent groups of primary side coils for energy transmission.

The parallel power distribution topology and the secondary coupling form adopt multi-component group-harmonic primary-side modules, which are directly connected in parallel or connected in parallel through the secondary coupling of the transformer, and connected in parallel to the high-frequency AC bus. The primary-side modules are laid sequentially on the ground section, and the secondary-side coils are coupled with the corresponding group or adjacent groups of primary-side coils for energy transmission.

Existing energy transmission is highly dependent on a single high-frequency inverter source and a high-frequency AC bus; each group of primary-side modules also consists of only one set of primary-side coils (magnetic coupling mechanism) and one set of primary-side resonant compensation topology. Series or LCC resonant compensation topologies.

This imposes the following constraints on the system design:

With the high power of dynamic wireless power supply technology, high current and voltage stress have higher requirements on power electronic devices; In the case of large reflection impedance and power fluctuations, it is also difficult to perform high robustness control under large power fluctuations.

At the same time, due to the dependence on a single DC bus and primary side modules, it is necessary to select wires and capacitors from the perspective of current stress; however, due to the skin effect and proximity effect, the selection of wire diameter requires a large margin, resulting in a large increase in the cost of the primary side system. At the same time, it also brings a large voltage stress, which is not conducive to the thinning and miniaturization of the primary side system, and there are certain risks in the safety and economy of its long-term operation.

Contents of the invention

The purpose of the present invention is to solve the existing energy transmission of dynamic wireless power supply systems for electric vehicles, automatic guided vehicles (AGV), rail transit and other objects, which are highly dependent on a single high-frequency inverter source and a high-frequency AC bus To solve the problems of low transmission efficiency, large primary side system, poor safety and economy, etc., a multi-module magnetic parallel transmitter circuit topology for a high-power dynamic wireless power supply system for electric vehicles is proposed.

The present invention is achieved through the following technical solutions. The present invention proposes a multi-module magnetic parallel transmitter circuit topology for a high-power dynamic wireless power supply system for electric vehicles. The transmitter circuit topology specifically includes an inverter source module and a primary side module The inverter source module includes a low-frequency rectification and filtering module and n high-frequency inverter modules, the low-frequency rectification and filtering module is connected to the power grid, and the n high-frequency inverter modules are connected in parallel to the DC at the output side of the low-frequency rectification and filtering module On the bus; the primary-side module is composed of n compensation topologies and n primary-side coils, the n compensation topologies are connected to n high-frequency inverter modules one by one, and the n primary-side coils are connected to n compensation The topology is one-to-one correspondence and the resonant frequency matching is performed separately. The n primary coils are integrated in a group of primary coils using magnetic parallel technology, and are coupled with the secondary coils to realize wireless energy transmission.

Further: the low-frequency rectification and filtering module is composed of a three-phase transformer, a full-wave rectification and filtering circuit, and a step-down chopper in series.

Further: the low-frequency rectification and filtering module is composed of a three-phase or single-phase rectification and filtering circuit and a DC-DC converter in series.

Further: the low-frequency rectification and filtering module is composed of a controllable rectification or multi-pulse rectification circuit.

Further: the n high-frequency inverter modules are all composed of 4 IGBT tubes, and the 4 IGBT tubes form an H-bridge, the bridge arm input side of the H-bridge is connected to the low-frequency rectification and filtering module, and the output side is connected to the primary side modules are connected.

Further: the n compensation topologies are all composed of capacitors or resonant frequency matching networks composed of inductors and capacitors.

Further: the primary side coil is made of multiple strands of coils that are parallel and circularly wound to form a flat coil, and only the lead wires at the outlet end are laminated.

Further: the primary side coil is made of a flat plate coil by parallel winding of multi-strand coils, and after each turn is wound, the outermost coil is the innermost coil of the next parallel coil, and the next outer turn coil is the next The second inner layer of the coil wound by one turn, the coils are sequentially exchanged in the winding position until they are finally drawn out.

Further: the control method of the multi-module magnetic parallel transmitter circuit topology of the high-power dynamic wireless power supply system for electric vehicles: under the full output condition, the IGBT tubes corresponding to the positions of n groups of high-frequency inverter source modules are controlled by the same sequential PWM, PWM1 signal controls IGBT tubes S _1-1 , S _2-1 ... S _n-1 , IGBT tubes S _1-4 , S _2-4 ... S _n-4 ; PWM2 signal controls IGBT tubes S _1-2 , S _2-2 ...S _n-2 , IGBT tube S _1-3 , S _2-3 ...S _n-3 ;

Then the working state of the first group of high-frequency inverter modules in the high-frequency inverter module is:

Working state 1, PWM1 is at high level, PWM2 is at low level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

Working state 2, PWM1 is at low level, PWM2 is at high level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

The working status of the remaining high-frequency inverter modules is the same as that of the first group of high-frequency inverter modules;

Let the total output power of the inverter source be P _o , and the output power of a single high-frequency inverter module be P _module ;

Then the output power P _module of each group of high-frequency inverter modules = P _o /n, the adjustment of the output power of a single high-frequency inverter module is realized by controlling the duty cycle of the PWM signal, and then the required power is realized through the magnetic parallel connection of the high-frequency inverter modules Output.

Further: the control method of the multi-module magnetic parallel transmitter circuit topology of the high-power dynamic wireless power supply system for electric vehicles: under the limit output condition, set the total output power of the inverter source as P _o , and a single group of high-frequency inverter The output power of the module is P _module ; then: (m-1)×P _module <P _o ≤m×P _module , 0<m<n, m∈Z;

Then in the case of limited output, m groups of high-frequency inverter modules are in the working state, and the corresponding position IGBT tubes are controlled by PWM in the same sequence: PWM1 signal controls IGBT tubes S _1-1 , S _2-1 ... S _m-1 , IGBT tubes S _1-4 , S _2-4 ... S _m-4 ; PWM2 signal controls IGBT tubes S _1-2 , S _2-2 ... S _m-2 , IGBT tubes S _1-3 , S _{2- 3} ……S _m-3 ; the working state of each group of high-frequency inverter modules in operation is the same as that of the first group of high-frequency inverter modules in the full-scale working state, and there are two working states: working state 1 and working state 2:

Working state 1, PWM1 is at high level, PWM2 is at low level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

Working state 2, PWM1 is at low level, PWM2 is at high level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

At the same time, the output power P _module of each high-frequency inverter module = P _o /m, the adjustment of the output power of a single group of high-frequency inverter modules is realized by controlling the duty cycle of the PWM signal, and the remaining nm groups of high-frequency inverter modules do not add Excitation, the four IGBTs are all turned off, and the high-frequency inverter module does not work, that is, the high-frequency inverter module does not output electric energy;

Among them, the activated m high-frequency inverter modules have no strict correspondence with the calibrated high-frequency inverter module serial numbers, that is, the activated m high-frequency inverter modules can be selected or combined randomly or according to certain mathematical laws, but the total number of activated Still m;

When the calculation of m and n still complies with the above working conditions, take: m<a<n, a∈Z;

Then in the case of derated output, the high-frequency inverter module of group a is in the working state, and the corresponding position IGBT tubes are controlled by PWM in the same sequence: PWM1 signal controls IGBT tubes S _1-1 , S _2-1 ... S _{a- 1} , S _1-4 , S _2-4 ... S _a-4 ; PWM2 signal controls IGBT tube S _1-2 , S _2-2 ... S _a-2 , S _1-3 , S _2-3 ... S _a-3 ; the working state of the high-frequency inverter modules in each group of work is the same as the first group of high-frequency inverter modules in the full working state, and there are two working states: working state 1 and working state 2:

Working state 1, PWM1 is at high level, PWM2 is at low level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

Working state 2, PWM1 is at low level, PWM2 is at high level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

At the same time, the output power P module of each high-frequency inverter _module = P _o /a, the adjustment of the output power of a single high-frequency inverter module is realized by controlling the duty cycle of the PWM signal, and then the demand is realized through the magnetic parallel connection of the high-frequency inverter modules Power output; the remaining na groups of high-frequency inverter modules are not excited, all four IGBTs are turned off, and the high-frequency inverter module does not work, that is, the high-frequency inverter module does not output electric energy;

Among them, the activated a high-frequency inverter modules have no strict correspondence with the calibrated high-frequency inverter module serial numbers, that is, the activated a high-frequency inverter modules can be selected or combined randomly or according to certain mathematical laws, but the total number of activated Still a.

Description of drawings

FIG. 1 is a schematic diagram of the basic structure of a dynamic wireless power supply system in the prior art;

Fig. 2 is a schematic diagram of three typical primary-side system structures in the prior art; (a) primary-side topology of series power distribution, (b) primary-side topology of parallel power distribution (c) primary-side topology of secondary coupled power distribution;

Figure 3 shows the multi-module magnetic parallel topology of the transmitter;

Fig. 4 is a circuit diagram of rectification, filtering and voltage regulation;

Fig. 5 is the circuit diagram of the magnetic parallel primary side system;

Figure 6 is a working mode diagram of the full output of the magnetic parallel primary side system; (a) is working mode 1, and (b) is working mode 2;

Figure 7 is a timing diagram of a magnetic parallel primary side IGBT;

Fig. 8 is a planar coil wound in a plane; (a) is a planar coil wound with 2 turns, and (b) is a planar coil wound with multiple turns;

Fig. 9 is a planar coil with a single-turn exchange coil position; (a) is a planar coil wound with 2 turns, and (b) is a planar coil wound with multiple turns;

Detailed ways

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that those skilled in the art can make some modifications and improvements without departing from the present concept, and the embodiments proposed without making creative progress. These all belong to the protection scope of the present invention.

The purpose of the present invention is to solve the existing energy transmission of dynamic wireless power supply systems for electric vehicles, automatic guided vehicles (AGV), rail transit and other objects, which are highly dependent on a single high-frequency inverter source and a high-frequency AC bus To solve the problems of low transmission efficiency, large primary side system, poor safety and economy, etc., a multi-module magnetic parallel transmitter circuit topology for a high-power dynamic wireless power supply system for electric vehicles is proposed.

The present invention is achieved through the following technical solutions. The present invention proposes a multi-module magnetic parallel transmitter circuit topology for a high-power dynamic wireless power supply system for electric vehicles. The transmitter circuit topology specifically includes an inverter source module and a primary side module The inverter source module includes a low-frequency rectification and filtering module and n high-frequency inverter modules, the low-frequency rectification and filtering module is connected to the power grid, and the n high-frequency inverter modules are connected in parallel to the DC at the output side of the low-frequency rectification and filtering module On the bus; the primary-side module is composed of n compensation topologies and n primary-side coils, the n compensation topologies are connected to n high-frequency inverter modules one by one, and the n primary-side coils are connected to n compensation The topology is one-to-one correspondence and the resonant frequency matching is performed separately. The n primary coils are integrated in a group of primary coils using magnetic parallel technology, and are coupled with the secondary coils to realize wireless power transmission.

An implementation of the low-frequency rectification and filtering module is shown in FIG. 4 : it consists of a three-phase transformer, a full-wave rectification and filtering circuit, and a step-down chopper in series.

The low-frequency rectification and filtering module may be composed of a three-phase or single-phase rectification and filtering circuit and a DC-DC converter in series.

The low-frequency rectification and filtering module can also be composed of a controllable rectification or multi-pulse rectification circuit.

The low-frequency rectification and filtering module can also be removed, and the H-bridge of the subsequent stage "inverter module" can directly realize the function of AC converter, and convert the power frequency AC power into the work required for wireless power supply of electric vehicles. frequency of electricity. The output side of the rectification filter circuit is connected with the inverter module.

The n high-frequency inverter modules are all composed of 4 IGBT tubes, and the 4 IGBT tubes form an H-bridge. The input side of the bridge arm of the H-bridge is connected to the low-frequency rectification and filtering module, and the output side is connected to the primary side module. .

The n compensation topologies are all composed of capacitors or resonant frequency matching networks composed of inductors and capacitors, and FIG. 5 only shows the form composed of capacitor C _P1 .

Taking the planar coil as an example, an implementation of the primary side coil in the primary side module is shown in Figure 8. The coil color identification and electrical connection form are consistent with Figure 6, and the multi-strand coils are wound side by side to form a planar coil. The outgoing terminal leads are laminated.

The second implementation of the primary coil is shown in Figure 9, and the coil color identification and electrical connection form are consistent with Figure 6: multi-strand coils are wound side by side to form a flat coil, and after each turn is wound, the outermost The layer coil is the innermost coil of the next parallel coil, the second outer coil is the second inner coil of the next coil, and the winding positions of the coils are exchanged in turn.

until finally elicited;

This kind of winding method includes implementing the above coil winding position exchange method when the coil is wound in integer turns or fractional turns, that is, every turn or every few turns, that is, at a fixed position, the outermost coil is the outermost coil of the next turn. The inner layer coil, the second outer turn coil is the second inner layer coil of the next turn of the coil, and the winding positions of the coils are sequentially exchanged.

The third implementation of the primary side coil is to use twisted or braided winding, that is, after the multi-strand wires are twisted or braided into a strand of wires, they are wound according to the general method of flat coil winding, that is, they are wound side by side. system.

The fourth embodiment of the primary side coil is to use a flat strip wire or a general wire to wind, that is, each coil is wound in the general way of flat coil winding, that is, it is wound side by side sequentially. Then a plurality of coils are placed in layers.

Figure 6 shows the working state diagram of the primary side system under full output conditions, and Figure 7 shows the corresponding control sequence diagram;

The control method of the multi-module magnetic parallel transmitter circuit topology of the high-power dynamic wireless power supply system for electric vehicles: under the full output condition, the IGBT tubes corresponding to the positions of n groups of high-frequency inverter source modules are controlled by the same sequential PWM, and the PWM1 signal is controlled IGBT tubes S _1-1 , S _2-1 ... S _n-1 , IGBT tubes S _1-4 , S _2-4 ... S _n-4 ; PWM2 signal controls IGBT tubes S _1-2 , S _2-2 ...S _n-2 , IGBT tubes S _1-3 , S _2-3 ...S _n-3 ;

Then the working state of the first group of high-frequency inverter modules in the high-frequency inverter module is:

Working state 1, PWM1 is at high level, PWM2 is at low level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

Working state 2, PWM1 is at low level, PWM2 is at high level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

The working status of the remaining high-frequency inverter modules is the same as that of the first group of high-frequency inverter modules;

Let the total output power of the inverter source be P _o , and the output power of a single high-frequency inverter module be P _module ;

Then the output power P _module of each group of high-frequency inverter modules = P _o /n, the adjustment of the output power of a single high-frequency inverter module is realized by controlling the duty cycle of the PWM signal, and then the required power is realized through the magnetic parallel connection of the high-frequency inverter modules Output.

The control method of the multi-module magnetic parallel transmitter circuit topology of the electric vehicle high-power dynamic wireless power supply system: under the limit output condition, the total output power of the inverter source is set to P _o , and the output power of a single group of high-frequency inverter modules is is P _module ; then: (m-1)×P _module <P _o ≤m×P _module , 0<m<n, m∈Z;

Then in the case of limited output, m groups of high-frequency inverter modules are in the working state, and the corresponding position IGBT tubes are controlled by PWM in the same sequence: PWM1 signal controls IGBT tubes S _1-1 , S _2-1 ... S _m-1 , IGBT tubes S _1-4 , S _2-4 ... S _m-4 ; PWM2 signal controls IGBT tubes S _1-2 , S _2-2 ... S _m-2 , IGBT tubes S _1-3 , S _{2- 3} ……S _m-3 ; the working state of each group of high-frequency inverter modules in operation is the same as that of the first group of high-frequency inverter modules in the full-scale working state, and there are two working states: working state 1 and working state 2:

Working state 1, PWM1 is at high level, PWM2 is at low level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

Working state 2, PWM1 is at low level, PWM2 is at high level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

At the same time, the output power P _module of each high-frequency inverter module = P _o /m, the adjustment of the output power of a single group of high-frequency inverter modules is realized by controlling the duty cycle of the PWM signal, and the remaining nm groups of high-frequency inverter modules do not add Excitation, the four IGBTs are all turned off, and the high-frequency inverter module does not work, that is, the high-frequency inverter module does not output electric energy;

Among them, the activated m high-frequency inverter modules have no strict correspondence with the calibrated high-frequency inverter module serial numbers, that is, the activated m high-frequency inverter modules can be selected or combined randomly or according to certain mathematical laws, but the total number of activated Still m;

When the calculation of m and n still complies with the above working conditions, take: m<a<n, a∈Z;

Then in the case of derated output, the high-frequency inverter module of group a is in the working state, and the corresponding position IGBT tubes are controlled by PWM in the same sequence: PWM1 signal controls IGBT tubes S _1-1 , S _2-1 ... S _{a- 1} , S _1-4 , S _2-4 ... S _a-4 ; PWM2 signal controls IGBT tube S _1-2 , S _2-2 ... S _a-2 , S _1-3 , S _2-3 ... S _a-3 ; the working state of the high-frequency inverter modules in each group of work is the same as the first group of high-frequency inverter modules in the full working state, and there are two working states: working state 1 and working state 2:

Working state 1, PWM1 is at high level, PWM2 is at low level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

Working state 2, PWM1 is at low level, PWM2 is at high level, IGBT tubes S _1-1 and S _1-4 are turned on, and IGBT tubes S _1-2 and S _1-3 are turned off;

At the same time, the output power P module of each high-frequency inverter _module = P _o /a, the adjustment of the output power of a single high-frequency inverter module is realized by controlling the duty cycle of the PWM signal, and then the demand is realized through the magnetic parallel connection of the high-frequency inverter modules Power output; the remaining na groups of high-frequency inverter modules are not excited, all four IGBTs are turned off, and the high-frequency inverter module does not work, that is, the high-frequency inverter module does not output electric energy;

Among them, the activated a high-frequency inverter modules have no strict correspondence with the calibrated high-frequency inverter module serial numbers, that is, the activated a high-frequency inverter modules can be selected or combined randomly or according to certain mathematical laws, but the total number of activated Still a.

The above is a detailed introduction of the multi-module magnetic parallel transmitter circuit topology of a high-power dynamic wireless power supply system for electric vehicles provided by the present invention. In this paper, the principle and implementation of the present invention are explained. The above description is only for help Understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification is not It should be understood as a limitation of the present invention.

Claims (9)

1. A control method of a circuit topology of a multi-module magnetic parallel transmitting end of a high-power dynamic wireless power supply system of an electric automobile is characterized by comprising the following steps of: the transmitting end circuit topological structure specifically comprises an inversion source module and a primary side module; the inversion source module comprises a low-frequency rectification filter module and n high-frequency inversion modules, the low-frequency rectification filter module is connected with a power grid, and the n high-frequency inversion modules are connected in parallel on a direct current bus at the output side of the low-frequency rectification filter module; the primary side module consists of n compensation topologies and n primary side coils, the n compensation topologies are connected with the n high-frequency inversion modules one by one, the n primary side coils are in one-to-one correspondence with the n compensation topologies and are used for resonant frequency matching independently, the n primary side coils are integrated in a group of primary side coils by adopting a magnetic parallel technology and are coupled with the secondary side coils, and wireless power transmission is realized;

under the full output working condition, IGBT tubes at positions corresponding to the n groups of high-frequency inversion source modules are controlled by the same time sequence PWM, and PWM1 signals control IGBT tubes S _1-1 、S _2-1 ……S _n-1 IGBT tube S _1-4 、S _2-4 ……S _n-4 The method comprises the steps of carrying out a first treatment on the surface of the PWM2 signal control IGBT tube S _1-2 、S _2-2 ……S _n-2 IGBT tube S _1-3 、S _2-3 ……S _n-3 ；

The working state of the first group of high-frequency inversion modules in the high-frequency inversion modules is as follows:

working state 1, PWM1 is in high level, PWM2 is in low level, IGBT tube S _1-1 ，S _1-4 Conduction, IGBT tube S _1-2 ，S _1-3 Turning off;

working state 2, PWM1 is in low level, PWM2 is in high level, IGBT tube S _1-1 ，S _1-4 Conduction, IGBT tube S _1-2 ，S _1-3 Turning off;

the working states of the other high-frequency inversion modules are the same as those of the first group of high-frequency inversion modules;

let the total output power of the inversion source be P _o The output power of the single-group high-frequency inversion module is P _module ；

The output power P of each group of high-frequency inverter modules _module ＝P _o And/n, the output power of the single high-frequency inversion module is adjusted by controlling the duty ratio of the PWM signal, and then the output of the required power is realized by the magnetic parallel connection of the high-frequency inversion module.

2. The method for controlling a circuit topology according to claim 1, wherein: the low-frequency rectifying and filtering module is formed by sequentially connecting a three-phase transformer, a full-wave rectifying and filtering circuit and a step-down chopper in series.

3. The method for controlling a circuit topology according to claim 1, wherein: the low-frequency rectifying and filtering module is formed by sequentially connecting a three-phase or single-phase rectifying and filtering circuit and a DC-DC converter in series.

4. The method for controlling a circuit topology according to claim 1, wherein: the low-frequency rectifying and filtering module consists of a controllable rectifying circuit or a multi-pulse rectifying circuit.

5. The method for controlling a circuit topology according to claim 1, wherein: the n high-frequency inversion modules are composed of 4 IGBT tubes, the 4 IGBT tubes form an H bridge, the input side of a bridge arm of the H bridge is connected with the low-frequency rectification filter module, and the output side of the H bridge is connected with the primary side module.

6. The method for controlling a circuit topology according to claim 1, wherein: the n compensation topologies are composed of a resonant frequency matching network composed of capacitors or inductors and capacitors.

7. The method for controlling a circuit topology according to claim 1, wherein: the primary coil is formed by winding a plurality of coils in parallel and in a ring shape to form a flat coil, and only the leads at the wire outlet end are laminated.

8. The method for controlling a circuit topology according to claim 1, wherein: the primary coil is formed by winding a plurality of coils in parallel in a ring shape to form a flat coil, and after each turn of winding is finished, the outermost coil is the innermost coil of the next turn of parallel coil, the secondary outer coil is the secondary inner coil of the next turn of winding coil, and the coils are sequentially exchanged in winding positions until the coils are finally led out.

9. The control method of circuit topology according to claim 1: under the limit output working condition, the total output power of the inversion source is set as P _o The output power of the single-group high-frequency inversion module is P _module The method comprises the steps of carrying out a first treatment on the surface of the Then there are: (m-1) X P _module ＜P _o ≤m×P _module ，0＜m＜n，m∈Z；

In the case of quota output, m groups of high-frequency inverter modules are in working state, pairThe IGBT tube at the position is controlled by the same time sequence PWM: PWM1 signal control IGBT tube S _1-1 、S _2-1 ……S _m-1 IGBT tube S _1-4 、S _2-4 ……S _m-4 The method comprises the steps of carrying out a first treatment on the surface of the PWM2 signal control IGBT tube S _1-2 、S _2-2 ……S _m-2 IGBT tube S _1-3 、S _2-3 ……S _m-3 The method comprises the steps of carrying out a first treatment on the surface of the The working state of the high-frequency inversion module in each group of working is the same as that of the first group of high-frequency inversion module in the full-load working state, and the high-frequency inversion module has two working states of working state 1 and working state 2:

working state 1, PWM1 is in high level, PWM2 is in low level, IGBT tube S _1-1 ，S _1-4 Conduction, IGBT tube S _1-2 ，S _1-3 Turning off;

working state 2, PWM1 is in low level, PWM2 is in high level, IGBT tube S _1-1 ，S _1-4 Conduction, IGBT tube S _1-2 ，S _1-3 Turning off;

at the same time, the output power P of each high-frequency inversion module _module ＝P _o The output power of the single-group high-frequency inversion module is adjusted by controlling the duty ratio of the PWM signal, the remaining n-m groups of high-frequency inversion modules are not excited, the four IGBTs are all turned off, and the high-frequency inversion module does not work, namely the high-frequency inversion module does not output electric energy;

the number of the m high-frequency inversion modules which are opened does not have strict corresponding relation with the serial numbers of the calibrated high-frequency inversion modules, namely the m high-frequency inversion modules which are opened can be selected or combined randomly or according to a certain mathematical rule, but the total number of the opened high-frequency inversion modules is m;

taking: m is less than a and less than n, a is E Z;

under the condition of the derating output, the group a high-frequency inversion module is in a working state, and the IGBT tubes at the corresponding positions are controlled by the same time sequence PWM: PWM1 signal control IGBT tube S _1-1 ，S _2-1 ……S _a-1 ，S _1-4 ，S _2-4 ……S _a-4 The method comprises the steps of carrying out a first treatment on the surface of the PWM2 signal control IGBT tube S _1-2 ，S _2-2 ……S _a-2 ，S _1-3 ，S _2-3 ……S _a-3 The method comprises the steps of carrying out a first treatment on the surface of the High-frequency inversion mode in each group of operationThe working state of the block is the same as the first group of high-frequency inversion modules in the full-load working state, and the first group of high-frequency inversion modules have two working states, namely a working state 1 and a working state 2:

working state 1, PWM1 is in high level, PWM2 is in low level, IGBT tube S _1-1 ，S _1-4 Conduction, IGBT tube S _1-2 ，S _1-3 Turning off;

working state 2, PWM1 is in low level, PWM2 is in high level, IGBT tube S _1-1 ，S _1-4 Conduction, IGBT tube S _1-2 ，S _1-3 Turning off;

at the same time, the output power P of each high-frequency inversion module _module ＝P _o A, realizing the adjustment of the output power of the single high-frequency inversion module by controlling the duty ratio of the PWM signal, and further realizing the output of the required power by the magnetic parallel connection of the high-frequency inversion module; the rest n-a groups of high-frequency inversion modules are not excited, the four IGBTs are all turned off, the high-frequency inversion modules do not work, namely, the high-frequency inversion modules do not output electric energy;

the number of the opened a high-frequency inversion modules has no strict corresponding relation with the serial numbers of the calibrated high-frequency inversion modules, namely the opened a high-frequency inversion modules can be selected or combined randomly or according to a certain mathematical rule, but the total number of the opened a high-frequency inversion modules is still a.