CN112564307B - Dynamic wireless power supply system magnetic parallel transmitting end circuit topology control method - Google Patents
Dynamic wireless power supply system magnetic parallel transmitting end circuit topology control method Download PDFInfo
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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
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- 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
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- 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
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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
- H02J50/40—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
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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
- 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
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- 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
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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
- 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
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- 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
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- 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
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- 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
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- 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
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- 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
Abstract
The invention provides a multi-module magnetic parallel transmitting end circuit topology of a high-power dynamic wireless power supply system of an electric automobile, wherein the transmitting end circuit topology structure 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 on 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 integrated into a group of primary side coils in a magnetic parallel connection manner 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 volume of a primary side system, poor safety and economy and the like.
Description
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 an electric automobile high-power dynamic wireless power supply system and a control method thereof.
Background
The following problems are generally existed in the current scheme of the energy conversion circuit at the receiving end of the high-power dynamic wireless power supply system in the market:
the basic structure of the dynamic wireless power supply system is shown in figure 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 comprises three forms of series power distribution, parallel power distribution and secondary coupling power distribution. The series power distribution topology sequentially expands primary side modules, namely primary side coils (primary side magnetic coupling mechanisms) and resonance compensation networks, which are matched in groups in series; the primary side modules are laid on the ground section in sequence, and the secondary side coils are coupled with a corresponding group or groups of adjacent primary side coils to perform energy transmission.
The parallel distribution topology and the secondary coupling form adopt a plurality of groups of primary side modules which are assembled and tuned in groups, and are directly connected in parallel or are connected in parallel through the secondary coupling of a transformer, and are connected in parallel on the high-frequency alternating current bus. The primary side modules are laid on the ground section in sequence, and the secondary side coils are coupled with a corresponding group or groups of adjacent primary side coils to perform energy transmission.
The existing energy transmission is highly dependent 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 mechanisms) and one set of primary resonant compensation topologies, typically either series or LCC resonant compensation topologies.
This can impose the following limitations on the system design:
along 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 the multi-path parallel current sharing or voltage sharing output is carried out, the high robustness control under the large power fluctuation is difficult under the conditions of large reflection impedance and power fluctuation of the dynamic wireless power transmission of the electric automobile.
Meanwhile, the single direct current bus and the primary side module are relied on, so that the wire and the capacitor need to be selected from the current stress angle; however, due to skin effect and proximity effect, the wire diameter selection requires a larger margin, which results in larger increase of the cost of the primary side system, and simultaneously brings larger voltage stress, which is unfavorable for the light and thin and miniaturization of the primary side system, and the safety and economy of long-term operation of the primary side system also have a certain risk.
Disclosure of Invention
The invention aims to solve the problems that the existing energy transmission of the dynamic wireless power supply system of the existing electric automobile, automatic Guided Vehicles (AGVs), rail transit and other objects is highly dependent on a single high-frequency inversion source and a high-frequency alternating current bus, improve the defects of low transmission efficiency, overlarge primary system volume, poor safety and economy and the like, and provides a circuit topology of a multi-module magnetic parallel transmitting end of a high-power dynamic wireless power supply system of an electric automobile.
The invention is realized by the following technical scheme, the invention provides a multi-module magnetic parallel transmitting end circuit topology of a high-power dynamic wireless power supply system of an electric automobile, and the transmitting end circuit topology 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 and the n compensation topologies are in one-to-one correspondence and are subjected to 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, so that wireless power transmission is realized.
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 resonant frequency matching network composed of capacitors or inductors and capacitors.
Further: 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.
Further: 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.
Further: the control method of the circuit topology of the multi-module magnetic parallel transmitting end of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: 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 ；
Each group of high frequenciesOutput power P of inverter module 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.
Further: the control method of the circuit topology of the multi-module magnetic parallel transmitting end of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: 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；
Under the condition of quota output, m groups of high-frequency inversion modules are 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 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 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 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.
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 systems; (a) a series power distribution primary side topology, (b) a parallel power distribution primary side topology (c) a secondary coupled power distribution primary side topology;
FIG. 3 is a multi-module magnetic parallel topology of the transmitting end;
FIG. 4 is a diagram of a rectifying, filtering and voltage regulating circuit;
FIG. 5 is a circuit diagram of a magnetic shunt primary side system;
FIG. 6 is a diagram of the operational mode of the full output of the magnetic parallel primary side system; (a) is a working mode 1, and (b) is a working mode 2;
FIG. 7 is a timing diagram of a magnetic parallel primary IGBT;
FIG. 8 is a planar coil using planar winding; (a) A flat coil wound for 2 circles, and (b) a flat coil wound for a plurality of circles;
FIG. 9 is a flat coil employing a single turn exchange coil position; (a) A flat coil wound for 2 circles, and (b) a flat coil wound for a plurality of circles;
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments 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 be limiting in any way. It should be noted that modifications and improvements to the embodiments described herein can be made by those skilled in the art without departing from the present concepts. These are all within the scope of the present invention.
The invention aims to solve the problems that the existing energy transmission of the dynamic wireless power supply system of the existing electric automobile, automatic Guided Vehicles (AGVs), rail transit and other objects is highly dependent on a single high-frequency inversion source and a high-frequency alternating current bus, improve the defects of low transmission efficiency, overlarge primary system volume, poor safety and economy and the like, and provides a circuit topology of a multi-module magnetic parallel transmitting end of a high-power dynamic wireless power supply system of an electric automobile.
The invention is realized by the following technical scheme, the invention provides a multi-module magnetic parallel transmitting end circuit topology of a high-power dynamic wireless power supply system of an electric automobile, and the transmitting end circuit topology 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 and the n compensation topologies are in one-to-one correspondence and are subjected to 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, so that wireless power transmission is realized.
One embodiment of the low frequency rectifying and filtering module is shown in fig. 4: the three-phase transformer, the full-wave rectifying and filtering circuit and the step-down chopper are sequentially connected in series.
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 be removed, the function of an alternating current-to-alternating current converter is directly realized by the H bridge of the back-stage 'inversion module', and the power frequency alternating current electric energy is converted into electric energy with the working frequency required by wireless power supply of the electric automobile. The output side of the rectifying and filtering 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 each composed of a resonant frequency matching network composed of a capacitor or an inductor and a capacitor, and only capacitor C is shown in FIG. 5 P1 Form of composition.
Taking a flat coil as an example, one embodiment of a primary coil in a primary module is shown in fig. 8, the color identification and electrical connection form of the coil are identical to those of fig. 6, and a plurality of coils are wound in parallel and in a ring shape to form a flat coil, and only the wires at the wire outlet end are laminated.
A second embodiment of the primary coil is shown in fig. 9, with the coil color identification and electrical connection pattern consistent with fig. 6: the multi-strand coil is wound in a parallel annular mode to form a flat coil, after each turn of coil is wound, the outermost coil is the innermost coil of the next turn of coil in parallel, the secondary outer coil is the secondary inner coil of the next turn of coil, and the coils are sequentially exchanged for winding positions.
Until the final extraction;
the winding mode comprises an embodiment of implementing the above coil winding position exchange mode when an integer number of turns or fractional turns, namely each turn or every few turns of coils are wound, namely in a fixed position, an outermost coil is an innermost coil of a next turn parallel coil, a secondary outer coil is a secondary inner coil of the next turn wound coil, and the coils are sequentially exchanged for winding positions.
The third embodiment of the primary coil is wound by a twisted or braided manner, i.e. after a plurality of wires are twisted or braided into a single wire, the winding is performed in the usual manner of flat coil winding, i.e. side by side in sequence.
A fourth embodiment of the primary coil is wound using flat ribbon wire or a common wire, i.e. each coil is wound in the usual 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 output working condition, and fig. 7 is a corresponding control timing diagram;
the control method of the circuit topology of the multi-module magnetic parallel transmitting end of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: 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.
The control method of the circuit topology of the multi-module magnetic parallel transmitting end of the high-power dynamic wireless power supply system of the electric automobile comprises the following steps: 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；
Under the condition of quota output, m groups of high-frequency inversion modules are 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 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 modules in the full-load working state, and the high-frequency inversion modules compriseTwo 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 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 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.
The multi-module magnetic parallel transmitting end circuit topology of the high-power dynamic wireless power supply system of the electric automobile is described in detail, and the principle and the implementation mode of the invention are described herein, and the description is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
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.
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