CN112564307A - Multi-module magnetic parallel transmitting end circuit topology of high-power dynamic wireless power supply system of electric automobile and control method thereof - Google Patents

Multi-module magnetic parallel transmitting end circuit topology of high-power dynamic wireless power supply system of electric automobile and control method thereof Download PDF

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CN112564307A
CN112564307A CN202011362180.XA CN202011362180A CN112564307A CN 112564307 A CN112564307 A CN 112564307A CN 202011362180 A CN202011362180 A CN 202011362180A CN 112564307 A CN112564307 A CN 112564307A
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module
frequency inversion
frequency
modules
working state
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CN112564307B (en
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姜金海
周星健
张剑韬
朱春波
宋凯
董帅
赵梵丹
王子健
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Harbin Institute of Technology
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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
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Inverter Devices (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

The invention provides a multi-module magnetic parallel transmission end circuit topology of a high-power dynamic wireless power supply system of an electric automobile, wherein the transmission end circuit topology specifically comprises an inversion source and a primary side module; the inversion source 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 to a direct-current bus at the output side of the low-frequency rectification filter module; the n compensation topologies of the primary side module and the n primary side coils are independently subjected to resonant frequency matching, and the n primary side coils are magnetically connected in parallel and integrated into one group of primary side coils and are coupled with the secondary side coils to realize wireless power transmission; the invention solves the problem that the existing dynamic wireless power supply system is highly dependent on a single high-frequency inversion source and a high-frequency alternating current bus, and overcomes the defects of low transmission efficiency, overlarge primary side system volume, poor safety and economy and the like.

Description

Multi-module magnetic parallel transmitting end circuit topology of high-power dynamic wireless power supply system of electric automobile and control method thereof
Technical Field
The invention relates to the field of wireless power supply, in particular to a multi-module magnetic parallel transmitting end circuit topology of a high-power dynamic wireless power supply system of an electric automobile and a control method thereof.
Background
The scheme of the energy conversion circuit at the receiving end of the high-power dynamic wireless power supply system on the market generally has the following problems:
the basic structure of the dynamic wireless power supply system is shown in fig. 1 and is divided into a primary side system (ground part) and a secondary side system (vehicle-mounted part); the prior art implementation of the primary side system of the dynamic wireless power supply system is shown in fig. 2, and mainly includes three forms of series power distribution, parallel power distribution and secondary coupling power distribution. The series power distribution topology sequentially expands each group of harmonic-distributed primary side modules, namely a primary side coil (a primary side magnetic coupling mechanism) and a resonance compensation network in series; the primary side modules are sequentially laid on the ground road section, and the secondary side coils are coupled with one or more adjacent groups of primary side coils for energy transmission.
The parallel distribution topology and the secondary coupling form adopt a plurality of groups of primary modules matched in resonance, and adopt a form of direct parallel connection or secondary coupling parallel connection through a transformer, and the primary modules are connected in parallel to a high-frequency alternating current bus. The primary side modules are sequentially laid on the ground road section, and the secondary side coils are coupled with one or more adjacent groups of primary side coils for energy transmission.
The existing energy transmission highly depends on a single high-frequency inversion source and a high-frequency alternating current bus; each set of primary modules is also composed of only one set of primary coils (magnetic coupling mechanism) and one set of primary resonance compensation topology, usually series or LCC resonance compensation topology.
This imposes the following limitations on the system design:
with the high power of the dynamic wireless power supply technology, high current and voltage stress have higher requirements on power electronic devices; even if the modularized design is adopted and multi-path parallel current sharing or voltage sharing output is carried out, under the conditions of large reflection impedance and power fluctuation of dynamic wireless power transmission of the electric automobile, high robustness control under large power fluctuation is difficult to carry out.
Meanwhile, because the single direct current bus and the primary side module are relied on, wires and capacitors need to be selected from the current stress angle; however, due to the skin effect and the proximity effect, the selection of the wire diameter needs a large margin, which causes a large increase in the cost of the primary side system, and also brings a large voltage stress, which is not favorable for the lightness, thinness and miniaturization of the primary side system, and has a certain risk in the safety and economy of long-term operation.
Disclosure of Invention
The invention aims to solve the problem that the existing energy transmission of a dynamic wireless power supply system of the current objects of an electric automobile, an Automatic Guided Vehicle (AGV), rail transit and the like is highly dependent on a single high-frequency inversion source and a high-frequency alternating current bus, overcomes the defects of low transmission efficiency, overlarge primary side system volume, poor safety and economy and the like, and provides a multi-module magnetic parallel transmitting end circuit topology of a high-power dynamic wireless power supply system of the electric automobile.
The invention is realized by the following technical scheme, the invention provides a multi-module magnetic parallel transmission end circuit topology of a high-power dynamic wireless power supply system of an electric automobile, and the transmission end circuit topology 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 to a direct-current bus at the output side of the low-frequency rectification filter module; the primary side module is composed 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 correspond to the n compensation topologies one by one and are independently subjected to resonant frequency matching, and the n primary side coils are integrated in a group of primary side coils and are coupled with the secondary side coils by adopting a magnetic parallel technology to realize wireless power transmission.
Further: 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.
Further: 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.
Further: the low-frequency rectifying and filtering module consists of a controllable rectifying circuit or a multi-pulse rectifying circuit.
Further: 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.
Further: the n compensation topologies are composed of a capacitor or a resonant frequency matching network composed of an inductor and a capacitor.
Further: the primary coil is formed by winding a plurality of strands of coils in parallel and annularly to form a flat coil, and only the lead at the wire outlet end is laminated.
Further: the primary coil is formed by winding a plurality of coils in parallel and annularly to form a flat coil, after winding of each turn is finished, the outermost coil is the innermost coil of the next turn of parallel coil, the secondary outer turn coil is the secondary inner coil of the next turn of wound coil, and the coils are sequentially exchanged in winding positions until the coils are finally led out.
Further: the control method of the multi-module magnetic parallel transmitting end circuit topology of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: under the full output working condition, the IGBT tubes at the corresponding positions of the n groups of high-frequency inversion source modules are controlled by the same time sequence PWM (pulse-width modulation)1 signal control IGBT tube S1-1、S2-1……Sn-1IGBT tube S1-4、S2-4……Sn-4(ii) a IGBT tube S controlled by PWM2 signal1-2、S2-2……Sn-2IGBT tube S1-3、S2-3……Sn-3；
Then the working state of the first group of high-frequency inversion modules in the high-frequency inversion modules is as follows:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
the working states of the other high-frequency inversion modules are the same as the working states of the first group of high-frequency inversion modules;
setting the total output power of the inverter source to be PoThe output power of the single-group high-frequency inversion module is Pmodule；
The output power P of each group of high-frequency inversion modulesmodule＝PoAnd n, adjusting the output power of the single high-frequency inversion module by controlling the duty ratio of the PWM signal, and further outputting the required power by magnetically connecting the high-frequency inversion modules in parallel.
Further: the control method of the multi-module magnetic parallel transmitting end circuit topology of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: under the condition of limited output, the total output power of the inversion source is set as PoThe output power of the single-group high-frequency inversion module is Pmodule(ii) a Then there are: (m-1). times.Pmodule＜Po≤m×Pmodule，0＜m＜n，m∈Z；
Then under the condition of quota output, m groups of high-frequency inversion modules are in a working state, and IGBT tubes at corresponding positions are controlled by the same time sequence PWM: IGBT tube S controlled by PWM1 signal1-1、S2-1……Sm-1IGBT tube S1-4、S2-4……Sm-4(ii) a IGBT tube S controlled by PWM2 signal1-2、S2-2……Sm-2IGBT tube S1-3、S2-3……Sm-3(ii) a 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-scale working state, and the first group of high-frequency inversion module has two working states of working state 1 and working state 2:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
meanwhile, the output power P of each high-frequency inversion modulemodule＝PoThe output power of a single group of high-frequency inversion modules is adjusted by controlling the duty ratio of PWM signals, the rest n-m groups of high-frequency inversion modules are not excited, 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 m high-frequency inversion modules which are switched on do 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 switched on can be randomly selected or combined according to a certain mathematical rule, but the total number of the switching-on modules is still m;
and under the condition that the calculation of m and n still accords with the working state, taking: m is more than a and less than n, and a belongs to Z;
under the condition of derating output, the a group of high-frequency inversion modules are in a working state, and IGBT tubes at corresponding positions are controlled by the same time sequence PWM: IGBT tube S controlled by PWM1 signal1-1，S2-1……Sa-1，S1-4，S2-4……Sa-4(ii) a IGBT tube S controlled by PWM2 signal1-2，S2-2……Sa-2，S1-3，S2-3……Sa-3(ii) a 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-scale working state, and the first group of high-frequency inversion module has two working states of working state 1 and working state 2:
operating State 1, PWM1 is high, PWM2 is at low level, IGBT pipe S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
meanwhile, the output power P of each high-frequency inversion modulemodule＝PoThe output power of the single high-frequency inversion module is adjusted by controlling the duty ratio of the PWM signal, and the output of the required power is realized by magnetically connecting the high-frequency inversion modules in parallel; the rest n-a groups of high-frequency inversion modules are not excited, four IGBTs are all turned off, and the high-frequency inversion modules do not work, namely the high-frequency inversion modules do not output electric energy;
the a high-frequency inversion modules which are switched on have no strict corresponding relation with the serial number of the calibrated high-frequency inversion module, namely the a high-frequency inversion modules which are switched on can be selected or combined randomly or according to a certain mathematical rule, but the total number of the switched-on high-frequency inversion modules is still a.
Drawings
Fig. 1 is a schematic diagram of a basic structure of a dynamic wireless power supply system in the prior art;
FIG. 2 is a schematic diagram of three typical prior art primary side system configurations; (a) a series power distribution primary side topology, (b) a parallel power distribution primary side topology (c) is a secondary coupling power distribution primary side topology;
FIG. 3 is a transmitting end multi-module magnetic parallel topology;
FIG. 4 is a circuit diagram of a rectifying, filtering and voltage regulating circuit;
FIG. 5 is a circuit diagram of a magnetically parallel primary side system;
FIG. 6 is a diagram of the operating mode of the full output of the magnetically parallel primary system; (a) working mode 1, (b) working mode 2;
fig. 7 is a timing diagram of a magnetic parallel primary side IGBT;
FIG. 8 is a flat coil wound in a flat plane; (a) 2-turn flat coil winding, (b) multi-turn flat coil winding;
FIG. 9 is a flat coil employing a single turn of the exchange coil position; (a) 2-turn flat coil winding, (b) multi-turn flat coil winding;
Detailed Description
The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiment of the present invention. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that it will be apparent to those skilled in the art that numerous variations and modifications can be made without departing from the present concepts and the claimed embodiments may be practiced without such inventive faculty. All falling within the scope of the present invention.
The invention aims to solve the problem that the existing energy transmission of a dynamic wireless power supply system of the current objects of an electric automobile, an Automatic Guided Vehicle (AGV), rail transit and the like is highly dependent on a single high-frequency inversion source and a high-frequency alternating current bus, overcomes the defects of low transmission efficiency, overlarge primary side system volume, poor safety and economy and the like, and provides a multi-module magnetic parallel transmitting end circuit topology of a high-power dynamic wireless power supply system of the electric automobile.
The invention is realized by the following technical scheme, the invention provides a multi-module magnetic parallel transmission end circuit topology of a high-power dynamic wireless power supply system of an electric automobile, and the transmission end circuit topology 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 to a direct-current bus at the output side of the low-frequency rectification filter module; the primary side module is composed 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 correspond to the n compensation topologies one by one and are independently subjected to resonant frequency matching, and the n primary side coils are integrated in a group of primary side coils and are coupled with the secondary side coils by adopting a magnetic parallel technology to realize wireless power transmission.
One embodiment of the low-frequency rectifying and filtering module is shown in fig. 4: the three-phase transformer, the full-wave rectification filter circuit and the step-down chopper are connected in series in sequence.
The low-frequency rectifying and filtering module can be formed by sequentially connecting a three-phase or single-phase rectifying and filtering circuit and a DC-DC converter in series.
The low-frequency rectifying and filtering module can also consist of a controllable rectifying circuit or a multi-pulse rectifying circuit.
The low-frequency rectifying and filtering module can also remove the module, the function of an alternating current variable converter is directly realized by an H bridge of the rear-stage inversion module, and power frequency alternating current electric energy is converted into electric energy with working frequency required by wireless power supply of the electric automobile. The output side of the rectification filter circuit is connected with the inversion module.
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.
The n compensation topologies are all composed of a capacitor or a resonant frequency matching network composed of an inductor and a capacitor, and only a capacitor C is given in FIG. 5P1The form of the composition.
Taking a flat coil as an example, one embodiment of the primary coil in the primary module is shown in fig. 8, the color identification and electrical connection form of the coil are the same as those in fig. 6, and a plurality of coils are wound in parallel and annularly to form the flat coil, and only the lead at the outlet end is laminated.
A second embodiment of the primary coil is shown in fig. 9, with coil color identification and electrical connection style consistent with fig. 6: and multiple strands of coils are wound in a parallel annular mode to form a flat coil, after winding of each turn is finished, the outermost coil is the innermost coil of the next turn of parallel coils, the second outer turn is the second inner coil of the next turn of wound coils, and the coils are sequentially switched in winding positions.
Until finally leading out;
the winding mode comprises an implementation mode of implementing the winding position exchange of an upper coil when winding coils with integral or fractional turns, namely each turn or each plurality of turns, namely at a fixed position, an outermost coil is an innermost coil of a next turn of parallel coils, a secondary outer turn coil is a secondary inner coil of a next turn of winding coils, and the coils sequentially exchange winding positions.
A third embodiment of the primary winding is wound by twisting or braiding, i.e. after a plurality of wires are twisted or braided into one wire, the winding is performed according to the general winding method of flat coils, i.e. the winding is performed side by side in sequence.
A fourth embodiment of the primary coil is wound using flat ribbon wire or generally wire, i.e. each coil is wound in the general manner of flat coil winding, i.e. side by side in sequence. And then a plurality of coils are stacked.
Fig. 6 is a working state diagram of the primary side system under the full-rated output condition, and fig. 7 is a corresponding control timing diagram;
the control method of the multi-module magnetic parallel transmitting end circuit topology of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: under the full output working condition, the IGBT tubes at the corresponding positions of the n groups of high-frequency inversion source modules are controlled by the same time sequence PWM, and the IGBT tubes S are controlled by PWM1 signals1-1、S2-1……Sn-1IGBT tube S1-4、S2-4……Sn-4(ii) a IGBT tube S controlled by PWM2 signal1-2、S2-2……Sn-2IGBT tube S1-3、S2-3……Sn-3；
Then the working state of the first group of high-frequency inversion modules in the high-frequency inversion modules is as follows:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
the working states of the other high-frequency inversion modules are the same as the working states of the first group of high-frequency inversion modules;
setting the total output power of the inverter source to be PoThe output power of the single-group high-frequency inversion module is Pmodule；
The output power P of each group of high-frequency inversion modulesmodule＝PoAnd n, adjusting the output power of the single high-frequency inversion module by controlling the duty ratio of the PWM signal, and further outputting the required power by magnetically connecting the high-frequency inversion modules in parallel.
The control method of the multi-module magnetic parallel transmitting end circuit topology of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: under the condition of limited output, the total output power of the inversion source is set as PoThe output power of the single-group high-frequency inversion module is Pmodule(ii) a Then there are: (m-1). times.Pmodule＜Po≤m×Pmodule，0＜m＜n，m∈Z；
Then under the condition of quota output, m groups of high-frequency inversion modules are in a working state, and IGBT tubes at corresponding positions are controlled by the same time sequence PWM: IGBT tube S controlled by PWM1 signal1-1、S2-1……Sm-1IGBT tube S1-4、S2-4……Sm-4(ii) a IGBT tube S controlled by PWM2 signal1-2、S2-2……Sm-2IGBT tube S1-3、S2-3……Sm-3(ii) a 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-scale working state, and the first group of high-frequency inversion module has two working states of working state 1 and working state 2:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
meanwhile, the output power P of each high-frequency inversion modulemodule＝PoThe output power of a single group of high-frequency inversion modules is adjusted by controlling the duty ratio of PWM signals, the rest n-m groups of high-frequency inversion modules are not excited, 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 m high-frequency inversion modules which are switched on do 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 switched on can be randomly selected or combined according to a certain mathematical rule, but the total number of the switching-on modules is still m;
and under the condition that the calculation of m and n still accords with the working state, taking: m is more than a and less than n, and a belongs to Z;
under the condition of derating output, the a group of high-frequency inversion modules are in a working state, and IGBT tubes at corresponding positions are controlled by the same time sequence PWM: IGBT tube S controlled by PWM1 signal1-1，S2-1……Sa-1，S1-4，S2-4……Sa-4(ii) a IGBT tube S controlled by PWM2 signal1-2，S2-2……Sa-2，S1-3，S2-3……Sa-3(ii) a 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-scale working state, and the first group of high-frequency inversion module has two working states of working state 1 and working state 2:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
meanwhile, the output power P of each high-frequency inversion modulemodule＝PoThe output power of the single high-frequency inversion module is adjusted by controlling the duty ratio of the PWM signal, and the output of the required power is realized by magnetically connecting the high-frequency inversion modules in parallel; the rest n-a groups of high-frequency inversion modules are not excited, four IGBTs are all turned off, and the high-frequency inversion modules do not work, namely the high-frequency inversion modules do not output electric energy;
the a high-frequency inversion modules which are switched on have no strict corresponding relation with the serial number of the calibrated high-frequency inversion module, namely the a high-frequency inversion modules which are switched on can be selected or combined randomly or according to a certain mathematical rule, but the total number of the switched-on high-frequency inversion modules is still a.
The multi-module magnetic parallel transmitting end circuit topology of the high-power dynamic wireless power supply system of the electric automobile provided by the invention is introduced in detail, the principle and the implementation mode of the invention are explained in the text, and the above description is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. The utility model provides a high-power dynamic wireless power supply system multimode magnetism parallel connection transmitting terminal circuit topology of electric automobile which characterized in that: the topological structure of the transmitting end circuit 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 to a direct-current bus at the output side of the low-frequency rectification filter module; the primary side module is composed 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 correspond to the n compensation topologies one by one and are independently subjected to resonant frequency matching, and the n primary side coils are integrated in a group of primary side coils and are coupled with the secondary side coils by adopting a magnetic parallel technology to realize wireless power transmission.
2. The circuit topology of 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 circuit topology of 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 circuit topology of claim 1, wherein: the low-frequency rectifying and filtering module consists of a controllable rectifying circuit or a multi-pulse rectifying circuit.
5. The circuit topology of 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 circuit topology of claim 1, wherein: the n compensation topologies are composed of a capacitor or a resonant frequency matching network composed of an inductor and a capacitor.
7. The circuit topology of claim 1, wherein: the primary coil is formed by winding a plurality of strands of coils in parallel and annularly to form a flat coil, and only the lead at the wire outlet end is laminated.
8. The circuit topology of claim 1, wherein: the primary coil is formed by winding a plurality of coils in parallel and annularly to form a flat coil, after winding of each turn is finished, the outermost coil is the innermost coil of the next turn of parallel coil, the secondary outer turn coil is the secondary inner coil of the next turn of wound coil, and the coils are sequentially exchanged in winding positions until the coils are finally led out.
9. The method for controlling the topology of the multi-module magnetic parallel transmitting end circuit of the high-power dynamic wireless power supply system of the electric vehicle as claimed in claim 1 comprises the following steps: under the full output working condition, the IGBT tubes at the corresponding positions of the n groups of high-frequency inversion source modules are controlled by the same time sequence PWM, and the IGBT tubes S are controlled by PWM1 signals1-1、S2-1……Sn-1IGBT tube S1-4、S2-4……Sn-4(ii) a IGBT tube S controlled by PWM2 signal1-2、S2-2……Sn-2IGBT tube S1-3、S2-3……Sn-3；
Then the working state of the first group of high-frequency inversion modules in the high-frequency inversion modules is as follows:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
the working states of the other high-frequency inversion modules are the same as the working states of the first group of high-frequency inversion modules;
setting the total output power of the inverter source to be PoThe output power of the single-group high-frequency inversion module is Pmodule；
The output power P of each group of high-frequency inversion modulesmodule＝PoAnd n, adjusting the output power of the single high-frequency inversion module by controlling the duty ratio of the PWM signal, and further outputting the required power by magnetically connecting the high-frequency inversion modules in parallel.
10. The method for controlling the topology of the multi-module magnetic parallel transmitting end circuit of the high-power dynamic wireless power supply system of the electric vehicle as claimed in claim 1 comprises the following steps: under the condition of limited output, the total output power of the inversion source is set as PoThe output power of the single-group high-frequency inversion module is Pmodule(ii) a Then there are: (m-1). times.pmodule＜Po≤m×Pmodule，0＜m＜n，m∈Z；
Then under the condition of quota output, m groups of high-frequency inversion modules are in a working state, and IGBT tubes at corresponding positions are controlled by the same time sequence PWM: IGBT tube S controlled by PWM1 signal1-1、S2-1……Sm-1IGBT tube S1-4、S2-4……Sm-4(ii) a IGBT tube S controlled by PWM2 signal1-2、S2-2……Sm-2IGBT tube S1-3、S2-3……Sm-3(ii) a 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-scale working state, and the first group of high-frequency inversion module has two working states of working state 1 and working state 2:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
operating State 2, PWM1 is Low, PWM2 is highIGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
meanwhile, the output power P of each high-frequency inversion modulemodule＝PoThe output power of a single group of high-frequency inversion modules is adjusted by controlling the duty ratio of PWM signals, the rest n-m groups of high-frequency inversion modules are not excited, 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 m high-frequency inversion modules which are switched on do 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 switched on can be randomly selected or combined according to a certain mathematical rule, but the total number of the switching-on modules is still m;
and under the condition that the calculation of m and n still accords with the working state, taking: m is more than a and less than n, and a belongs to Z;
under the condition of derating output, the a group of high-frequency inversion modules are in a working state, and IGBT tubes at corresponding positions are controlled by the same time sequence PWM: IGBT tube S controlled by PWM1 signal1-1，S2-1……Sa-1，S1-4，S2-4……Sa-4(ii) a IGBT tube S controlled by PWM2 signal1-2，S2-2……Sa-2，S1-3，S2-3……Sa-3(ii) a 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-scale working state, and the first group of high-frequency inversion module has two working states of working state 1 and working state 2:
in the working state 1, the PWM1 is at a high level, the PWM2 is at a low level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
in the working state 2, the PWM1 is at a low level, the PWM2 is at a high level, and the IGBT tube S1-1，S1-4Conducting IGBT tube S1-2，S1-3Turning off;
meanwhile, the output power P of each high-frequency inversion modulemodule＝PoA, adjusting the output power of the single high-frequency inversion module by controlling the duty ratio of the PWM signal, and then realizing the output of the required power by magnetically connecting the high-frequency inversion modules in parallelDischarging; the rest n-a groups of high-frequency inversion modules are not excited, four IGBTs are all turned off, and the high-frequency inversion modules do not work, namely the high-frequency inversion modules do not output electric energy;
the a high-frequency inversion modules which are switched on have no strict corresponding relation with the serial number of the calibrated high-frequency inversion module, namely the a high-frequency inversion modules which are switched on can be selected or combined randomly or according to a certain mathematical rule, but the total number of the switched-on high-frequency inversion modules is still a.
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