WO2020203464A1 - Dispositif de transmission d'énergie - Google Patents

Dispositif de transmission d'énergie Download PDF

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Publication number
WO2020203464A1
WO2020203464A1 PCT/JP2020/013007 JP2020013007W WO2020203464A1 WO 2020203464 A1 WO2020203464 A1 WO 2020203464A1 JP 2020013007 W JP2020013007 W JP 2020013007W WO 2020203464 A1 WO2020203464 A1 WO 2020203464A1
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WIPO (PCT)
Prior art keywords
power transmission
power
side resonance
arm switch
unit
Prior art date
Application number
PCT/JP2020/013007
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English (en)
Japanese (ja)
Inventor
統公 木村
和弘 宇田
正樹 金▲崎▼
耕司 間崎
宜久 山口
Original Assignee
株式会社デンソー
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Publication of WO2020203464A1 publication Critical patent/WO2020203464A1/fr

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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
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • 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
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
    • 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
    • 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
    • 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
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • 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

Definitions

  • the present disclosure relates to a power transmission device of a non-contact power supply system that transmits power from a power transmission device to a power receiving device in a non-contact manner.
  • Non-contact power supply system that transmits power in a non-contact manner
  • Patent Document 1 a non-contact power supply system that transmits power in a non-contact manner
  • an inverter circuit is provided on the power transmission device side, and AC power is supplied from the inverter circuit to the power transmission coil. Then, electric power is transmitted from the power transmitting coil to the power receiving coil on the vehicle side in a non-contact manner, and power is supplied from the power receiving coil to the storage battery.
  • the present disclosure has been made in view of the above circumstances, and its main purpose is to provide a power transmission device capable of suppressing power consumption.
  • a means for solving the above problems is a non-contact power supply system that transmits power in a non-contact manner between a power transmission device provided on the road side and a power receiving device provided on the vehicle side to charge a storage battery provided in the vehicle.
  • a power transmission device a plurality of power transmission coils, a detection unit that detects the power transmission coil that is not involved in power transmission among the plurality of power transmission coils, and energization of an electric path between one end and the other end of the power transmission coil.
  • one end and the other end of the power transmission coil that are not involved in power transmission are short-circuited. Therefore, even if the magnetic coupling coefficient between the power transmission coils is high, it is possible to suppress the flow of current through the power transmission coils that are not involved in power transmission and suppress unnecessary power consumption.
  • FIG. 1 is a block diagram showing a configuration of a non-contact power supply system.
  • FIG. 2 is a circuit diagram showing the electrical configuration of the power transmission unit.
  • FIG. 3 is a circuit diagram showing the electrical configuration of the power receiving device.
  • FIG. 4 is a perspective view showing a resonance coil on the power transmission side.
  • FIG. 5 is a perspective view showing the power receiving side resonance coil.
  • FIG. 6 is a circuit diagram showing a conventional current path.
  • FIG. 7 is a circuit diagram showing a current path.
  • FIG. 8 is a flowchart showing processing related to power transmission control.
  • FIG. 9 is a block diagram showing a configuration of another non-contact power supply system.
  • FIG. 10 is a block diagram showing a configuration of another non-contact power supply system.
  • FIG. 11 is a block diagram showing a configuration of another non-contact power supply system.
  • the non-contact power supply system 10 in the present embodiment includes a power transmission device 20 that non-contactly transmits the electric power supplied from the commercial power source 11 and a power receiving device 30 that non-contactly transmits the electric power from the power transmission device 20.
  • the power transmission device 20 is buried on the road side (highway or the like) on which the vehicle travels.
  • the power receiving device 30 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and charges the vehicle-mounted battery 12 by outputting electric power to the vehicle-mounted battery 12 as a storage battery.
  • FIG. 1 shows a schematic configuration of the non-contact power supply system 10 in this embodiment.
  • a commercial power source 11 is connected to the power transmission device 20 of the non-contact power supply system 10, and is configured to input AC power supplied from the commercial power source 11 to the power transmission device 20.
  • an in-vehicle battery 12 is connected to the power receiving device 30 of the non-contact power feeding system 10, and the power receiving device 30 outputs electric power to the in-vehicle battery 12 so that charging is performed.
  • the power transmitting device 20 and the power receiving device 30 each have a coil of three phases (U phase, V phase, W phase) so as to enable three-phase power feeding.
  • the power transmission device 20 includes an AC-DC converter 21 connected to the commercial power source 11 and power transmission units 20a to 20c connected to the AC-DC converter 21. A plurality of power transmission units 20a to 20c are provided.
  • the AC-DC converter 21 converts AC power supplied from the commercial power source 11 into DC power. Then, the AC-DC converter 21 outputs the converted DC power to the power transmission units 20a to 20c. Therefore, when viewed from the power transmission units 20a to 20c, the AC-DC converter 21 corresponds to a DC power supply.
  • each power transmission unit 20a to 20c will be described.
  • the configurations of the power transmission units 20a to 20c are the same.
  • the configuration of the power transmission unit 20a will be described on behalf of the power transmission units 20a to 20c.
  • FIG. 2 shows the electrical configuration of the power transmission unit 20a.
  • the power transmission unit 20a includes an inverter circuit 22 as an inverter, a power transmission side filter circuit 23 connected to the inverter circuit 22, and a power transmission side resonance circuit 24 connected to the power transmission side filter circuit 23, respectively.
  • the inverter circuit 22 as an inverter converts the DC power supplied from the AC-DC converter 21 into AC power having a predetermined frequency.
  • a three-phase inverter that converts three-phase AC power of U-phase, V-phase, and W-phase is used.
  • the inverter circuit 22 is connected to the AC-DC converter 21. Specifically, the high potential side terminal of the inverter circuit 22 is connected to the positive electrode terminal of the AC-DC converter 21. On the other hand, the low potential side terminal of the inverter circuit 22 is connected to the negative electrode terminal of the AC-DC converter 21.
  • the inverter circuit 22 is composed of a full bridge circuit having the same number of upper and lower arms as the number of three-phase phases. The current in each phase is adjusted by turning on / off the switching element provided in each arm. In this embodiment, the inverter circuit 22 corresponds to the switch unit.
  • the inverter circuit 22 includes a series connection body of the upper arm switch Sp and the lower arm switch Sn as switching elements in three phases including the U phase, the V phase, and the W phase.
  • a voltage-controlled semiconductor switching element is used as the upper arm switch Sp and the lower arm switch Sn in each phase, and specifically, an IGBT is used.
  • MOSFET may be used.
  • Freewheel diodes (reflux diodes) Dp and Dn are connected in antiparallel to the upper arm switch Sp and the lower arm switch Sn in each phase, respectively.
  • the freewheel diodes Dp and Dn may be body diodes of semiconductor switching elements.
  • the high potential side terminal (collector) of the upper arm switch Sp of each phase is connected to the positive electrode terminal of the AC-DC converter 21. Further, the low potential side terminal (emitter) of the lower arm switch Sn of each phase is connected to the negative electrode terminal (ground) of the AC-DC converter 21.
  • the intermediate connection points between the upper arm switch Sp and the lower arm switch Sn of each phase are connected to the power transmission side filter circuit 23, respectively.
  • the transmission side resonance as the U phase transmission coil of the transmission side resonance circuit 24 is performed via the transmission side filter circuit 23 or the like. It is connected to the coil 26u.
  • the power transmission side as the power transmission coil of the V phase of the power transmission side resonance circuit 24 is passed through the power transmission side filter circuit 23 or the like. It is connected to the resonance coil 26v.
  • the power transmission side as the W phase power transmission coil of the power transmission side resonance circuit 24 is passed through the power transmission side filter circuit 23 or the like. It is connected to the resonance coil 26w.
  • the inverter circuit 22 is provided with a smoothing capacitor 28 which is connected in parallel to the series connection body of the upper arm switch Sp and the lower arm switch Sn.
  • the power transmission side filter circuit 23 is a circuit that removes AC power (AC current) in a predetermined frequency range from AC power input from the inverter circuit 22.
  • a low-pass filter is used as the power transmission side filter circuit 23.
  • the transmission side filter circuit 23 is an imittance converter (impedance admittance converter) in which the input voltage and the output current are proportional and the input current and the output voltage are proportional.
  • the power transmission side filter circuit 23 includes a series connector in which two reactors 23a and 23b are connected in series for each phase. Further, the power transmission side filter circuit 23 includes a capacitor 23c, one end of which is connected to an intermediate connection point of each series connection body, for each series connection body. The other end of each capacitor 23c is connected at a connection point (neutral point) N1. That is, the other ends of each capacitor 23c are connected to each other.
  • the power transmission side resonance circuit 24 is a circuit that outputs the AC power input from the power transmission side filter circuit 23 to the power receiving device 30.
  • the power transmission side resonance circuit 24 is provided with an LC resonance circuit in which the power transmission side resonance capacitors 25u, 25v, 25w and the power transmission side resonance coils 26u, 26v, 26w are connected in series for each phase.
  • One end of the LC resonance circuit is connected to the power transmission side filter circuit 23, and the other end is connected to the neutral point N2.
  • the power receiving device 30 serves as a rectifier connected to a power receiving side resonance circuit 31 to which power is supplied from the power transmitting side resonance circuit 24, a power receiving side filter circuit 32 connected to the power receiving side resonance circuit 31, and a power receiving side filter circuit 32.
  • the rectifier circuit 33 of the above and a DC-DC converter 34 connected to the rectifier circuit 33 are provided.
  • the power receiving side resonance circuit 31 is a circuit that inputs power from the power transmission side resonance circuit 24 in a non-contact manner and outputs it to the power reception side filter circuit 32.
  • the power receiving side resonance circuit 31 has the same configuration as the power transmission side resonance circuit 24, and is configured to be able to resonate with the power transmission side resonance circuit 24 in a magnetic field.
  • the power receiving side resonance circuit 31 is provided with an LC resonance circuit in which the power receiving side resonance capacitors 35u, 35v, 35w and the power receiving side resonance coils 36u, 36v, 36w as the power receiving coil are connected in series for each phase. ing.
  • One end of the LC resonance circuit is connected to the neutral point N3, and the other end is connected to the power receiving side filter circuit 32.
  • the resonance frequencies of the power receiving side resonance circuit 31 and the power transmission side resonance circuit 24 are set to be the same.
  • the power receiving side filter circuit 32 removes the AC power in a predetermined frequency range included in the AC power input from the power receiving side resonance circuit 31.
  • a low-pass filter is used as the power receiving side filter circuit 32.
  • the power receiving side filter circuit 32 is an imittance converter (impedance / admittance converter) in which the input voltage and the output current are proportional and the input current and the output voltage are proportional.
  • the power receiving side filter circuit 32 includes a series connector in which two reactors 32a and 32b are connected in series for each phase. Further, the power receiving side filter circuit 32 includes a capacitor 32c, one end of which is connected to an intermediate connection point of each series connection body, for each series connection body. The other end of each capacitor 32c is connected at a connection point (neutral point) N4. That is, the other ends of each capacitor 32c are connected to each other.
  • the rectifier circuit 33 is a circuit that full-wave rectifies AC power.
  • a full-wave rectifier circuit composed of a diode bridge is adopted as the rectifier circuit 33, but a synchronous rectifier circuit composed of six switching elements (for example, MOSFET) may be used.
  • the DC-DC converter 34 transforms the DC power input from the rectifier circuit 33 and outputs it to the in-vehicle battery 12.
  • the in-vehicle battery 12 charges the DC power input from the DC-DC converter 34.
  • the power transmission device 20 is provided with a power transmission control unit 60 that controls the power transmission device 20, and the power reception device 30 is provided with a power reception control unit 70 that controls the power reception device 30.
  • the power transmission control unit 60 controls the AC-DC converter 21 and the inverter circuits 22 of the power transmission units 20a to 20c.
  • the power receiving control unit 70 controls the DC-DC converter 34.
  • the vehicle is provided with an ECU 50 (Electronic Control Unit), which gives an instruction to the power receiving control unit 70 to perform non-contact power supply while the vehicle is running and charge the in-vehicle battery 12.
  • ECU 50 Electronic Control Unit
  • the transmission side resonance coil 26u , 26v, 26w and the power receiving side resonance coils 36u, 36v, 36w resonate in magnetic fields, respectively.
  • the power receiving device 30 receives energy from the power transmitting device 20. That is, it receives AC power.
  • the non-contact power supply system 10 is intended to enable non-contact power supply while the vehicle is running. At that time, it is desirable to make the period during which power can be supplied as long as possible. Therefore, as shown in FIG. 4, the power transmission side resonance coils 26u, 26v, 26w of the power transmission units 20a to 20c are arranged so as to be adjacent to each other along the vehicle traveling direction (that is, the road extension direction). Here, the shapes and arrangements of the power transmission side resonance coils 26u, 26v, 26w will be described.
  • the power transmission side resonance coils 26au, 26av, 26aw of the power transmission unit 20a are shown, the power transmission side resonance coils 26bu, 26bv, 26bw of the power transmission unit 20b, and the power transmission side resonance coils 26cu, 26cv, 26cw of the power transmission unit 20c. In some cases.
  • the power transmission side resonance coils 26au, 26av, and 26aw are square flat coils formed by winding windings (for example, litz wires) in a flat shape.
  • the power transmission side resonance coils 26au, 26av, and 26aw are formed in an annular shape. The shape and the number of turns of the power transmission side resonance coils 26au, 26av, and 26aw are the same.
  • These power transmission side resonance coils 26au, 26av, 26aw are arranged and fixed on the ferrite core 27a as an iron core. More specifically, the ferrite core 27a is formed in a rectangular flat plate shape, and is arranged so that its longitudinal direction is along the extending direction of the road. Further, the ferrite core 27a is arranged so that the lateral direction is the width direction of the road and the plane is parallel to the road surface of the road. Then, on the plane of the ferrite core 27a, the power transmission side resonance coils 26au, 26av, 26aw are arranged along the longitudinal direction. At that time, the transmission side resonance coils 26au, 26av, and 26aw are arranged so as to be on the vehicle side (upper side) of the ferrite core 27a.
  • the power transmission side resonance coils 26au, 26av, and 26aw are arranged on the ferrite core 27a so as to be displaced from each other in the longitudinal direction. More specifically, the region surrounded by the power transmission side resonance coils 26au, 26av, 26aw is arranged so as to overlap each other with respect to the region surrounded by the other power transmission side resonance coils 26au, 26av, 26aw. At that time, the power transmission side resonance coils 26au, 26av, and 26aw are arranged so as to be displaced at equal intervals in the longitudinal direction. More specifically, they are arranged with an electrical angle offset by 120 °. In the present embodiment, the power transmission side resonance coil 26au is arranged in the center in the longitudinal direction, and the power transmission side resonance coils 26av and 26au are arranged on both sides in the longitudinal direction of the power transmission side resonance coil 26au.
  • the power transmission side resonance coils 26bu, 26bv, 26bw are configured in the same manner as the power transmission side resonance coils 26au, 26av, 26aw, and are arranged in the ferrite core 27b.
  • the power transmission side resonance coils 26bu, 26bv, 26bw are arranged so as to be displaced from the power transmission side resonance coils 26au, 26av, 26aw in the extending direction of the road.
  • the power transmission side resonance coils 26bu, 26bv, 26bw are arranged so as not to overlap with the power transmission side resonance coils 26au, 26av, 26au.
  • the power transmission side resonance coils 26cu, 26cv, 26cw are configured in the same manner as the power transmission side resonance coils 26au, 26av, 26au, and are arranged in the ferrite core 27c. Similarly, the power transmission side resonance coils 26cu, 26cv, 26cw are arranged so as to be displaced from the power transmission side resonance coils 26au, 26av, 26au and the power transmission side resonance coils 26bu, 26bv, 26bw in the extension direction of the road. ing.
  • the power transmission side resonance coils 26cu, 26cv, 26cw are arranged so as not to overlap with the power transmission side resonance coils 26au, 26av, 26aw and the power transmission side resonance coils 26bu, 26bv, 26bw.
  • the transmission side resonance coils 26bu, 26bv, 26bw are the transmission side resonance coils 26au, 26av, 26aw and the transmission side resonance coils 26cu, 26cv, 26cw. It is placed in between. That is, in the extending direction of the road, the power transmission side resonance coils 26au, 26av, 26aw and the power transmission side resonance coils 26cu, 26cv, 26cw are arranged on both sides of the power transmission side resonance coils 26bu, 26bv, 26bw.
  • the ferrite cores 27a to 27c are also arranged along the extension direction of the road in accordance with the arrangement of the power transmission side resonance coils 26u, 26v, 26w. At that time, as shown in FIG. 4, they are arranged so that there is no gap between the ferrite cores 27a to 27c.
  • the power receiving side resonance coils 36u, 36v, 36w are configured in substantially the same manner as the power transmission side resonance coils 26u, 26v, 26w.
  • the power receiving side resonance coils 36u, 36v, 36w are square flat coils formed by winding windings (for example, litz wires) in a flat shape.
  • the power receiving side resonance coils 36u, 36v, 36w are formed in an annular shape. The shape and the number of turns of the power receiving side resonance coils 36u, 36v, 36w are the same.
  • These power receiving side resonance coils 36u, 36v, 36w are arranged and fixed on the ferrite core 37 as an iron core. More specifically, the ferrite core 37 is formed in a rectangular flat plate shape, and is arranged so that its longitudinal direction is along the traveling direction of the vehicle. Further, the ferrite core 37 is arranged so that the lateral direction is the width direction of the vehicle and the plane surface is parallel to the bottom surface of the vehicle. That is, the plane of the ferrite core 37 is arranged so as to face the road surface of the road. Then, on the ferrite core 37, the power receiving side resonance coils 36u, 36v, 36w are arranged along the traveling direction (longitudinal direction). At that time, the power receiving side resonance coils 36u, 36v, 36w are arranged so as to be on the road side (lower side) of the ferrite core 37.
  • the power receiving side resonance coils 36u, 36v, 36w are arranged on the ferrite core 37 so as to be displaced from each other in the longitudinal direction. More specifically, the regions surrounded by the power receiving side resonance coils 36u, 36v, 36w are arranged so as to overlap each other with respect to the regions surrounded by the other power receiving side resonance coils 36u, 36v, 36w. At that time, the power receiving side resonance coils 36u, 36v, 36w are arranged so as to be displaced at equal intervals in the longitudinal direction. More specifically, they are arranged with an electrical angle offset by 120 °. In the present embodiment, the power receiving side resonance coil 36u is arranged in the center in the longitudinal direction, and the power receiving side resonance coils 36v and 36w are arranged on both sides in the longitudinal direction of the power receiving side resonance coil 36u.
  • the lengths of the power receiving side resonance coils 36u, 36v, 36w in the longitudinal direction (extension direction) are set to be about the same as the lengths of one set of power transmission side resonance coils 26u, 26v, 26w.
  • the power transmission side resonance coils 26u, 26v, 26w of the power transmission units 20a to 20c are arranged so as to be adjacent to each other along the vehicle traveling direction. Therefore, there is a possibility that the resonance coils 26u, 26v, 26w on the power transmission side are magnetically coupled to each other.
  • the possibility of magnetic coupling is high, and the power transmission side resonance coils 26u, 26v, 26w are connected to each other.
  • the magnetic coupling coefficient also increases.
  • the switching element of the inverter circuit 22 is turned off. That is, both the upper arm switch Sp and the lower arm switch Sn are turned off.
  • the power receiving device 30 faces the power transmission unit 20a and the power transmission unit 20b, but does not face the power transmission unit 20c. That is, the power receiving side resonance coils 36u, 36v, 36w face the transmission side resonance coils 26au, 26av, 26aw and the transmission side resonance coils 26bu, 26bv, 26bw, while the power transmission side resonance coils 26cu, 26cv, 26cw are opposed to each other. Are not facing each other. Therefore, in the state shown in FIG. 6, the power transmitting side resonance coils 26au, 26av, 26aw and the power transmission side resonance coils 26bu, 26bv, 26bw are compared with the power transmission side resonance coils 26cu, 26cv, 26cw. , 36v, 36w and the magnetic coupling coefficient become high.
  • the inverter circuit 22 is on / off controlled, and AC current is input to the power transmission side resonance coils 26au, 26av, 26aw and the power transmission side resonance coils 26bu, 26bv, 26bw. That is, since the magnetic coupling coefficient with the power receiving side resonance coils 36u, 36v, 36w is high and power transmission can be performed with high efficiency, the power transmission side resonance coils 26au, 26av, 26aw and the power transmission side resonance coils 26bu, 26bv, 26bw Transmit power.
  • the magnetic coupling coefficient with the power receiving side resonance coils 36u, 36v, 36w is low, and power transmission cannot be performed with higher efficiency than in the power transmission units 20a, 20b, so that the inverter circuit 22 is off-controlled. Will be done. That is, in the inverter circuit 22 of the power transmission unit 20c, both the upper arm switch Sp and the lower arm switch Sn are turned off. This state is shown in FIG.
  • FIG. 8 is a flowchart showing processing by the power transmission control unit 60.
  • the power transmission control unit 60 detects a physical quantity corresponding to the magnetic coupling coefficient (magnetic coupling degree) between the power transmission side resonance coils 26u, 26v, 26w and the power reception side resonance coils 36u, 36v, 36w from the detection unit (step). S100).
  • an infrared sensor SE1 is provided as a detection unit for each of the power transmission units 20a to 20c.
  • the power transmission control unit 60 acquires (detects) the distance from the power receiving device 30 (that is, the power receiving side resonance coils 36u, 36v, 36w) for each of the power transmission units 20a to 20c by each infrared sensor SE1.
  • the physical quantity corresponding to the magnetic coupling coefficient corresponds to the information related to the magnetic coupling coefficient, and is the distance from the power receiving device 30 in the present embodiment.
  • the power transmission control unit 60 determines whether or not the magnetic coupling coefficient with the power receiving side resonance coils 36u, 36v, 36w is equal to or higher than a predetermined value for each of the power transmission units 20a to 20c based on the detected physical quantity (Ste S110). In the present embodiment, the power transmission control unit 60 determines whether or not the power receiving device 30 exists at a distance facing the power transmission units 20a to 20c based on the detected distance. Specifically, it is determined whether or not the distance to the power receiving device 30 is equal to or less than the threshold value.
  • the power transmission control unit 60 sets the energization mode (step S120). That is, the power transmission control unit 60 controls the upper arm switch Sp and the lower arm switch Sn of the inverter circuit 22 on and off to convert the direct current (direct current) into the alternating current (alternating current). Then, the alternating current is supplied to the transmission side resonance coils 26u, 26v, 26w. As a result, the power transmission side resonance coils 26u, 26v, 26w and the power reception side resonance coils 36u, 36v, 36w resonate in magnetic fields, respectively.
  • step S130 the power transmission control unit 60 sets the standby mode (step S130). That is, the power transmission control unit 60 controls to turn off the upper arm switch Sp of the inverter circuit 22 and turn on the lower arm switch Sn.
  • Equation (4) when short-circuited by the lower arm switch Sn, the current flowing through the power transmission side resonance coils 26cu, 26cv, 26cw divides the on voltage of the lower arm switch Sn by the impedance of the power transmission side filter circuit 23. It becomes the value.
  • “Von” is the on-voltage of the lower arm switch Sn
  • "R” is the on-resistance of the lower arm switch Sn
  • "Ia” is the output current from the inverter circuit 22. ..
  • the on-voltage (on-resistance) of the lower arm switch Sn is so small that it can be ignored.
  • the current flowing through the transmission side resonance coils 26cu, 26cv, and 26cw, which are not involved in power transmission becomes almost zero.
  • each power transmission unit 20a to 20c is provided with three-phase power transmission side resonance coils 26u, 26v, 26w, but the number of phases may be arbitrarily changed. Similarly, the number of phases of the power receiving side resonance coils 36u, 36v, 36w may be arbitrarily changed.
  • the power transmission side resonance circuit 24 of each power transmission unit 20a to 20c may be single-phase.
  • the non-contact power feeding system 10 may have a single-phase transmission side resonance circuit 24 of each power transmission unit 20a to 20c and a plurality of phases of the power reception side resonance circuit 31.
  • the power transmission side resonance circuit 24 and the power reception side resonance circuit 31 of the power transmission units 20a to 20c may be single-phase.
  • the non-contact power feeding system 10 may have a plurality of phases of the power transmission side resonance circuit 24 and a single phase of the power reception side resonance circuit 31.
  • the power transmission side resonance coils 26u, 26v, 26w of the power transmission units 20a to 20c that are not involved in power transmission are turned on. One end and the other end of the were short-circuited.
  • the power transmission side resonance coils 26u, 26v, 26w of the power transmission units 20a to 20c that are not involved in power transmission One end and the other end may be short-circuited. Even in this case, the same effect can be obtained.
  • one end and the other end of the power transmission side resonance coils 26u, 26v, 26w of the power transmission units 20a to 20c that are not involved in power transmission are short-circuited by using the inverter circuit 22.
  • a switch SW may be provided as a switch unit for short-circuiting one end and the other end of the transmission side resonance coils 26u, 26v, 26w of the power transmission units 20a to 20c.
  • the switch SW is provided between the inverter circuit 22 and the power transmission side filter circuit 23, and is configured so that the terminals of each phase can be short-circuited.
  • the infrared sensor SE1 as a detection unit detects the distance between the power transmission unit 20a to 20c and the power receiving device 30 as a physical quantity related to the magnetic coupling coefficient.
  • the detection unit may be arbitrarily changed.
  • a current sensor for detecting the energizing current of each phase may be provided, and the magnetic coupling coefficient between the power transmitting device 20 and the power receiving device 30 may be determined based on the energizing current.
  • a communication device capable of communicating with the vehicle or the power receiving device 30 may be provided to determine the magnetic coupling coefficient between the power transmitting device 20 and the power receiving device 30.
  • the number of power transmission units 20a to 20c may be arbitrarily changed.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Inverter Devices (AREA)

Abstract

Dans la présente invention, un système d'alimentation électrique sans contact (10) transmet de l'énergie sans contact entre un dispositif de transmission d'énergie (20) disposé sur une route et un dispositif de réception d'énergie (30) disposé sur un véhicule, et charge une batterie de stockage (12) disposée dans le véhicule. Le dispositif de transmission d'énergie comprend : une pluralité d'unités de transmission d'énergie (20a-20c) ayant chacune des bobines de transmission d'énergie monophasée ou polyphasée (26u, 26v, 26w) et transmettant de l'énergie sans contact au dispositif de réception d'énergie ; une unité de détection (SE1) qui détecte une unité de transmission d'énergie qui n'est pas impliquée dans la transmission d'énergie parmi la pluralité d'unités de transmission d'énergie ; une unité de commutation (22) qui commute entre l'excitation et la coupure d'excitation d'un trajet électrique entre une extrémité et une autre extrémité des bobines de transmission d'énergie ; et une unité de commande (60) qui commande l'unité de commutation de manière à court-circuiter la première extrémité et l'autre extrémité de la bobine de transmission d'énergie de l'unité de transmission d'énergie qui n'est pas impliquée dans la transmission d'énergie et qui a été détectée par l'unité de détection.
PCT/JP2020/013007 2019-04-05 2020-03-24 Dispositif de transmission d'énergie WO2020203464A1 (fr)

Applications Claiming Priority (2)

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JP2019-072932 2019-04-05
JP2019072932A JP7041644B2 (ja) 2019-04-05 2019-04-05 送電装置

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WO2020203464A1 true WO2020203464A1 (fr) 2020-10-08

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009284696A (ja) * 2008-05-23 2009-12-03 Kawasaki Plant Systems Ltd 移動体用給電装置における給電制御装置
JP2020048369A (ja) * 2018-09-20 2020-03-26 株式会社テクノバ 走行中非接触給電システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009284696A (ja) * 2008-05-23 2009-12-03 Kawasaki Plant Systems Ltd 移動体用給電装置における給電制御装置
JP2020048369A (ja) * 2018-09-20 2020-03-26 株式会社テクノバ 走行中非接触給電システム

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