WO2014084347A1 - 非接触給電装置 - Google Patents
非接触給電装置 Download PDFInfo
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- WO2014084347A1 WO2014084347A1 PCT/JP2013/082168 JP2013082168W WO2014084347A1 WO 2014084347 A1 WO2014084347 A1 WO 2014084347A1 JP 2013082168 W JP2013082168 W JP 2013082168W WO 2014084347 A1 WO2014084347 A1 WO 2014084347A1
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- power
- circuit
- power transmission
- transmission side
- supplied
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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
- 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
- B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
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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
- B60L53/20—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 converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
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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
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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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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- H02J7/04—Regulation of charging current or voltage
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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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
- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
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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
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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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
- Y02T90/12—Electric charging stations
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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
Definitions
- the present invention relates to a non-contact power feeding apparatus that transfers power in a non-contact manner between a power transmission side and a power reception side, and in particular, uses a pair of a power transmission side pad and a power reception side pad, from a power transmission side pad to a power reception side pad.
- the present invention relates to a non-contact power feeding device that transmits power without contact.
- Patent Document 1 there is a non-contact power supply device disclosed in Patent Document 1 as a non-contact power supply device that uses a power transmission side pad and a power reception side pad in pairs and transmits power from the power transmission side pad to the power reception side pad in a contactless manner.
- This non-contact power feeding device is a device that transmits power to a load mounted on the vehicle in a non-contact manner from the outside of the vehicle.
- the non-contact power supply device includes a primary coil, a primary side capacitor, a secondary coil, a secondary side capacitor, a high-frequency AC power supply unit, and a rectification unit.
- the primary coil is a device that is installed at a predetermined position on the ground surface of the parking space and generates alternating magnetic flux when AC is supplied.
- the primary side capacitor is an element that is connected in parallel to the primary coil and forms a resonance circuit together with the primary coil.
- the secondary coil is installed at the bottom of the vehicle, and when the vehicle is parked in the parking space, the secondary coil is arranged to face the primary coil with an interval in the vertical direction, and is linked to the alternating magnetic flux generated by the primary coil. This is a device that generates alternating current by electromagnetic induction.
- the secondary side capacitor is an element that is connected in parallel to the secondary coil and forms a resonance circuit together with the secondary coil.
- the high-frequency AC power supply unit is a circuit that is connected to the primary coil to which the primary side capacitor is connected, and supplies high-frequency AC to the primary coil to which the primary side capacitor is connected.
- the rectifying unit is connected to the secondary coil to which the secondary side capacitor is connected, and is connected to the load and rectifies the alternating current supplied from the secondary coil to which the secondary side capacitor is connected to convert it to direct current.
- a circuit for supplying a load is supplying a load.
- the capacities of the primary side capacitor and the secondary side capacitor are in a predetermined facing state with the primary coil and the secondary coil as a reference, that is, with a predetermined value based on the coupling coefficient between the primary coil and the secondary coil.
- the AC power factor supplied from the high-frequency AC power supply unit to the primary coil connected to the primary capacitor is set to 1.
- the positional relationship between the primary coil and the secondary coil changes depending on the parking position of the vehicle and the weight of the load, and the coupling coefficient changes.
- the power factor decreases.
- a larger current must be passed when transmitting the same power.
- power transmission efficiency is reduced.
- an element having a large current capacity must be used so that a larger current can flow. This increases the size of the system.
- the present invention has been made in view of such circumstances, and is capable of transmitting a predetermined amount of power while suppressing a change in power factor even if the coupling coefficient between the power transmission side pad and the power reception side pad changes.
- An object is to provide a power feeding device.
- the non-contact power feeding device made to solve the above problems has a coil and is connected to a power transmission side pad that generates magnetic flux when supplied with AC power, and is connected to the power transmission side pad.
- a power transmission side resonance circuit that constitutes a resonance circuit together with a coil of the power transmission side pad, and a power reception side pad that has another coil and generates alternating current by linking the magnetic flux generated by the power transmission side pad, and a power reception side pad
- a power receiving side resonance circuit that is connected and constitutes a resonance circuit together with a coil of the power receiving side pad, and is connected to a DC power source and connected to a power transmission side pad, and converts a direct current supplied from the DC power source into an alternating current to transmit the power transmission side pad
- a power receiving circuit connected to the power receiving side pad and connected to the power supply target, and converts the alternating current supplied from the power receiving side pad into a direct current and supplies the power to the power supply target.
- This control circuit supplies power from the power transmission circuit to the power transmission side pad so that the AC power factor supplied from the power transmission circuit to the power transmission side pad and the DC power supplied from the power reception circuit to the power supply target are the target values.
- the AC voltage to be supplied and the AC voltage supplied from the power receiving side pad to the power receiving circuit are controlled to transmit power from the DC power source to the power supply target.
- FIG. 1 shows a configuration of a contactless power supply device 1 according to the first embodiment.
- the non-contact power supply apparatus 1 shown in FIG. 1 transmits power from an external battery B10 (DC power supply) installed outside the vehicle to an in-vehicle battery B11 (power supply target) mounted on the vehicle in a non-contact manner, and charges the in-vehicle battery B11.
- the non-contact power feeding apparatus 1 includes a power transmission side pad 10, a power transmission side resonance circuit 11, a power reception side pad 12, a power reception side resonance circuit 13, a power transmission circuit 14, a power transmission side filter circuit 15, and a power reception side filter circuit 16.
- the power transmission side pad 10 is a device that is installed at a predetermined position on the ground surface of the parking space and generates alternating magnetic flux when AC power is supplied.
- the power transmission side pad 10 includes a coil 100.
- the power transmission side resonance circuit 11 is connected to the power transmission side pad 10 and constitutes a resonance circuit together with the coil 100 of the power transmission side pad 10. Specifically, the capacitor 110 is connected in parallel to the power transmission side pad 10.
- the power receiving side pad 12 is installed at the bottom of the vehicle, and when the vehicle is parked in the parking space, the power receiving side pad 12 is arranged facing the power transmitting side pad 10 with an interval in the vertical direction, and the alternating magnetic flux generated by the power transmitting side pad 10 is generated. Is a device that generates alternating current by electromagnetic induction by interlinking.
- the power receiving side pad 12 includes a coil 120.
- the power reception side resonance circuit 13 is a circuit that is connected to the power reception side pad 12 and constitutes a resonance circuit together with the coil 120 of the power reception side pad 12. Specifically, the capacitor 130 is connected in parallel to the power receiving side pad 12.
- the capacities of the capacitors 110 and 130 are supplied from the power transmission circuit 14 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 when the power transmission side pad 10 and the power reception side pad 12 are in a predetermined facing state.
- the AC power factor is set to 1 or as close to 1 as possible within a selectable range.
- the power transmission circuit 14 is connected to the external battery B10 and connected to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected via the power transmission side filter circuit 15, and the direct current supplied from the external battery B10 is changed to an alternating current. It is a circuit that converts and supplies it to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected.
- the power transmission circuit 14 includes a power transmission side converter circuit 140 (power transmission side DC / DC conversion circuit) and an inverter circuit 141 (power transmission side DC / AC conversion circuit).
- the power transmission side converter circuit 140 is a circuit that is connected to the external battery B10 and the inverter circuit 141, converts a direct current supplied from the external battery B10 into a direct current having a different voltage, and supplies the direct current to the inverter circuit 141. Specifically, this is a well-known step-down converter circuit that steps down the direct current supplied from the external battery B10 and supplies it to the inverter circuit 141.
- the power transmission side converter circuit 140 includes a capacitor 140a, an IGBT 140b, a reactor 140c, a capacitor 140d, and a diode 140e.
- the capacitor 140a is an element for smoothing the direct current supplied from the external battery B10. One end and the other end of the capacitor 140a are connected to the positive end and the negative end of the external battery B10, respectively.
- the IGBT 140b is an element for storing and releasing energy in the reactor 140c by turning on and off.
- the IGBT 140b includes a free wheel diode connected in antiparallel between the collector and the emitter.
- the collector of IGBT 140b is connected to one end of capacitor 140a, and the emitter is connected to reactor 140c.
- the gate is connected to the control circuit 18.
- the reactor 140c is an element that induces a voltage while accumulating and releasing energy when a current flows.
- One end of the reactor is connected to the emitter of the IGBT 140b, and the other end is connected to the capacitor 140d.
- the capacitor 140d is an element for smoothing the stepped-down direct current.
- One end of the capacitor 140d is connected to the other end of the reactor 140c, and the other end is connected to the other end of the capacitor 140a.
- One end and the other end of the capacitor 140d are connected to the inverter circuit 141, respectively.
- the diode 140e is an element for flowing a current generated when the IGBT 140b is turned off and the energy stored in the reactor 140c is released.
- the anode of the diode 140e is connected to the other end of the capacitor 140d, and the cathode is connected to one end of the reactor 140c.
- the inverter circuit 141 is connected to the power transmission side converter circuit 140 and is connected to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected via the power transmission side filter circuit 15 and is supplied from the power transmission side converter circuit 140. This is a circuit that converts direct current into alternating current of a predetermined frequency and supplies it to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 via the power transmission side filter circuit 15.
- the inverter circuit 141 includes IGBTs 141a to 141d.
- the IGBTs 141a to 141d are elements for converting direct current to alternating current by turning on and off.
- the IGBTs 141a to 141d include free wheel diodes connected in antiparallel between the collector and the emitter.
- the IGBTs 141a and 141b and the IGBTs 141c and 141d are respectively connected in series.
- the emitters of the IGBTs 141a and 141c are connected to the collectors of the IGBTs 141b and 141d, respectively.
- Two sets of IGBTs 141a and 141b and IGBTs 141c and 141d connected in series are connected in parallel.
- the collectors of the IGBTs 141a and 141c are connected to one end of the capacitor 140d, and the emitters of the IGBTs 141b and 141d are connected to the other end of the capacitor 140d.
- the gates of the IGBTs 141a to 141d are connected to the control circuit 18, respectively.
- the connection points of the IGBTs 141a and 141b and the connection points of the IGBTs 141c and 141d are connected to the power transmission side filter circuit 15, respectively.
- the power transmission side filter circuit 15 is connected between the inverter circuit 141 and the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected, and is a circuit that removes a predetermined frequency component included in the alternating current supplied from the inverter circuit 141. It is.
- the power transmission side filter circuit 15 includes a reactor 150 and a capacitor 151.
- the reactor 150 and the capacitor 151 are elements for constituting a filter circuit. Reactor 150 and capacitor 151 are connected in series. Specifically, one end of the reactor 150 is connected to one end of the capacitor 151. The other end of the reactor 150 is connected to one end of the coil 100 to which the capacitor 110 is connected, and the other end of the capacitor 151 is connected to the connection point of the IGBTs 141a and 141b. The connection point of the IGBTs 141c and 141d is connected to the other end of the coil 100 to which the capacitor 110 is connected.
- the power transmission side filter circuit 15 is set so that the impedance at the basic frequency of the alternating current supplied from the inverter circuit 141 is smaller than the impedance of the resonance circuit constituted by the coil 100 of the power transmission side pad 10 and the power transmission side resonance circuit 11. ing.
- the inductance of the reactor 150 and the capacitance of the capacitor 151 are set to fixed values so that the resonance frequency becomes the basic frequency of alternating current supplied from the inverter circuit 141.
- the power receiving side filter circuit 16 is connected between the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected and the power receiving circuit 17, and is included in the alternating current supplied from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected. This is a circuit for removing predetermined frequency components.
- the power receiving side filter circuit 16 includes a reactor 160 and a capacitor 161.
- the reactor 160 and the capacitor 161 are elements for constituting a filter circuit.
- Reactor 160 and capacitor 161 are connected in series. Specifically, one end of the reactor 160 is connected to one end of the capacitor 161. The other end of the reactor 160 is connected to one end of the coil 120 and one end of the capacitor 130, and the other end of the capacitor 161 is connected to the power receiving circuit 17. The other end of the coil 120 and the other end of the capacitor 130 are connected to the power receiving circuit 17.
- the power receiving side filter circuit 16 is set so that the impedance at the basic frequency of the alternating current supplied from the inverter circuit 141 is smaller than the impedance of the resonance circuit constituted by the coil 120 of the power receiving side pad 12 and the power receiving side resonance circuit 13. ing. Specifically, the inductance of the reactor 160 and the capacitance of the capacitor 161 are set to fixed values so that the resonance frequency becomes the fundamental frequency of alternating current supplied from the inverter circuit 141.
- the power receiving circuit 17 is connected to the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected via the power receiving side filter circuit 16, and is connected to the in-vehicle battery B 11, and the power receiving side to which the power receiving side resonance circuit 13 is connected. This is a circuit that converts alternating current supplied from the pad 12 into direct current and supplies it to the in-vehicle battery B11.
- the power reception circuit 17 includes a rectifier circuit 170 (power reception side AC / DC conversion circuit) and a power reception side converter circuit 171 (power reception side DC / DC conversion circuit).
- the rectifier circuit 170 is connected to the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected via the power receiving side filter circuit 16, is connected to the power receiving side converter circuit 171, and is connected to the power receiving side resonance circuit 13. In this circuit, the AC supplied from the power receiving side pad 12 is rectified to be converted into DC and supplied to the power receiving side converter circuit 171.
- the rectifier circuit 170 includes diodes 170a to 170d.
- the diodes 170a to 170d are elements for rectifying alternating current.
- the diodes 170a and 170b and the diodes 170c and 170d are respectively connected in series. Specifically, the anodes of the diodes 170a and 170c are connected to the cathodes of the diodes 170b and 170d, respectively.
- Two sets of diodes 170a and 170b and diodes 170c and 170d connected in series are connected in parallel.
- a connection point between the diodes 170 a and 170 b is connected to the other end of the coil 120 to which the capacitor 130 is connected, and a connection point between the diodes 170 c and 170 d is connected to the other end of the capacitor 161.
- the cathodes of the diodes 170a and 170c and the anodes of the diodes 170b and 170d are connected to the power receiving side converter circuit 171, respectively.
- the power receiving side converter circuit 171 is a circuit that is connected to the rectifier circuit 170 and the in-vehicle battery B11, converts a direct current supplied from the rectifier circuit 170 into a direct current having a different voltage, and supplies the direct current to the in-vehicle battery B11. Specifically, it is a known boost converter circuit that boosts the direct current supplied from the rectifier circuit 170 and supplies the boosted direct current to the vehicle-mounted battery B11.
- the power receiving side converter circuit 171 includes a capacitor 171a, a reactor 171b, an IGBT 171c, a diode 171d, and a capacitor 171e.
- the capacitor 171a is an element for smoothing the direct current supplied from the rectifier circuit 170.
- One end of the capacitor 171a is connected to the cathodes of the diodes 170a and 170c, and the other end is connected to the anodes of the diodes 170b and 170d.
- Reactor 171b is an element that accumulates and releases energy and induces voltage when current flows.
- One end of the reactor 171b is connected to one end of the capacitor 171a, and the other end is connected to the IGBT 171c.
- the IGBT 171c is an element for storing and releasing energy in the reactor 171b by turning on and off.
- the IGBT 171c includes a free wheel diode connected in reverse parallel between the collector and the emitter.
- the collector of the IGBT 171c is connected to the other end of the reactor 171b, and the emitter is connected to the other end of the capacitor 171a.
- the gate is connected to the control circuit 18.
- the diode 171d is an element for supplying a current generated when the IGBT 171c is turned off and the energy stored in the reactor 171b is released.
- the anode of the diode 171d is connected to the other end of the reactor 171b, and the cathode is connected to the capacitor 171e.
- the capacitor 171e is an element for smoothing the boosted direct current.
- One end of the capacitor 171e is connected to the cathode of the diode 171d, and the other end is connected to the other end of the capacitor 171a. Further, one end and the other end of the capacitor 171e are connected to the positive electrode end and the negative electrode end of the in-vehicle battery B11, respectively.
- the control circuit 18 is a circuit that is connected to the power transmission circuit 14 and the power reception circuit 17, respectively, and controls the power transmission circuit 14 and the power reception circuit 17 in order to transmit power from the external battery B10 to the in-vehicle battery B11.
- the AC power factor supplied from the power transmission circuit 14 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 and the DC power supplied from the power reception circuit 17 to the in-vehicle battery B11 are the target values.
- the AC voltage supplied from the power transmission circuit 14 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 and the power supply side pad 12 connected to the power reception side resonance circuit 13 are supplied to the power reception circuit 17. It is the circuit which controls the alternating voltage which is done.
- the control circuit 18 includes a power transmission side current sensor 180, a power transmission side control circuit 181, a power reception side current sensor 182, and a power reception side control circuit 183.
- the power transmission side current sensor 180 is an element that detects an alternating current supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 and outputs a detection result.
- the power transmission side current sensor 180 is provided to clamp the wiring to the wiring connecting the inverter circuit 141 and the power transmission side filter circuit 15.
- the output end of the power transmission side current sensor 180 is connected to the power transmission side control circuit 181.
- the power transmission side control circuit 181 is connected to the power transmission circuit 14 and the power transmission side current sensor 180, transmits and receives information necessary for control to and from the power reception side control circuit 183 by wireless communication, and transmits the power transmission side converter circuit 140 and the inverter circuit 141. Is a circuit for controlling The power transmission side control circuit 181 is based on the detection result of the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected and the detection result of the power transmission side current sensor 180. The power factor of the alternating current supplied to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected is obtained and transmitted to the power reception side control circuit 183.
- the AC power factor supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 and the power supply side converter circuit 171 received from the power reception side control circuit 183 are supplied to the in-vehicle battery B11.
- the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected is controlled so that the direct current power to be the target value. Specifically, by controlling the power transmission circuit 14, the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 is controlled.
- the DC voltage supplied to the inverter circuit 141 is controlled by controlling the switching of the IGBT 140b, and the switching of the IGBTs 141a to 141d is controlled so that 180-degree rectangular wave conduction occurs. That is, by controlling the inverter circuit 141, the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 is not controlled, but the DC voltage supplied to the inverter circuit 141. By controlling this, the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 is controlled.
- the power transmission side control circuit 181 is connected to the gates of the IGBTs 140b and 141a to 141d, respectively. Moreover, it is respectively connected to the connection point of IGBT141a, 141b and the connection point of IGBT141c, 141d. Further, it is connected to the output terminal of the power transmission side current sensor 180.
- the power receiving side current sensor 182 is an element that detects a direct current supplied from the power receiving side converter circuit 171 to the in-vehicle battery B11 and outputs a detection result.
- the power receiving side current sensor 182 is provided so as to clamp the wiring to the wiring connecting the power receiving side converter circuit 171 and the in-vehicle battery B11.
- the output end of the power receiving side current sensor 182 is connected to the power receiving side control circuit 183.
- the power reception side control circuit 183 is a circuit that is connected to the power reception circuit 17 and the power reception side current sensor 182, transmits and receives information necessary for control to and from the power transmission side control circuit 181 by wireless communication, and controls the power reception circuit 17. .
- the power reception side control circuit 183 is supplied from the power reception side converter circuit 171 to the vehicle battery B11 based on the detection result of the voltage supplied from the power reception side converter circuit 171 to the vehicle battery B11 and the detection result of the power reception side current sensor 182. DC power to be obtained is transmitted to the power transmission side control circuit 181.
- the AC voltage supplied to the power receiving circuit 17 from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected is controlled so that the direct current power to be the target value. Specifically, by controlling the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171, the AC voltage supplied from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected to the power receiving circuit 17 is changed. Control.
- the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171 is controlled by controlling the power receiving side converter circuit 171. More specifically, the DC voltage supplied to the power receiving side converter circuit 171 is controlled by controlling the switching of the IGBT 171c.
- the power receiving side control circuit 183 is connected to the gate of the IGBT 171c.
- the capacitor 171e is connected to one end and the other end of the capacitor 171e. Further, the power receiving side current sensor 182 is connected to the output terminal.
- the power transmission side converter circuit 140 is controlled by the power transmission side control circuit 181 and steps down the direct current supplied from the external battery B10 by switching the IGBT 140b and supplies it to the inverter circuit 141.
- the inverter circuit 141 is controlled by the power transmission side control circuit 181 and switches the IGBTs 141a to 141d at a predetermined timing to convert the direct current supplied from the power transmission side converter circuit 140 into an alternating current of a predetermined frequency, for example, several tens of kHz,
- the power is supplied to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 via the power transmission side filter circuit 15.
- the power transmission side filter circuit 15 removes a predetermined frequency component included in the alternating current supplied from the inverter circuit 141.
- the rectangular wave AC voltage supplied from the inverter circuit 141 is converted into a sinusoidal AC voltage and supplied to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected.
- the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected generates alternating magnetic flux when AC power is supplied from the inverter circuit 141.
- the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected generates alternating current by electromagnetic induction by interlinking with the alternating magnetic flux generated by the power transmitting side pad 10.
- the power receiving filter circuit 16 removes a predetermined frequency component included in the alternating current supplied to the rectifier circuit 170. Specifically, a sinusoidal AC voltage supplied from the power receiving side pad 12 connected to the power receiving side resonance circuit 13 is converted into a rectangular wave AC voltage and supplied to the rectifying circuit 170.
- the rectifier circuit 170 rectifies the alternating current supplied from the power receiving side pad 12 connected to the power receiving side resonance circuit 13 via the power receiving side filter circuit 16 to convert it into direct current, and supplies the direct current to the power receiving side converter circuit 171.
- the power receiving side converter circuit 171 is controlled by the power receiving side control circuit 183, and boosts the direct current supplied from the rectifier circuit 170 by switching the IGBT 171c and supplies it to the in-vehicle battery B11 to charge the in-vehicle battery B11. In this way, power can be transmitted from the external battery B10 to the in-vehicle battery B11 in a non-contact manner.
- the power transmission side control circuit 181 starts from the inverter circuit 141 based on the detection result of the voltage supplied from the inverter circuit 141 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected and the detection result of the power transmission side current sensor 180.
- the power factor of the alternating current supplied to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 is obtained and transmitted to the power reception side control circuit 183.
- the power receiving side control circuit 183 changes from the power receiving side converter circuit 171 to the in-vehicle battery B11 based on the detection result of the voltage supplied from the power receiving side converter circuit 171 to the in-vehicle battery B11 and the detection result of the power receiving side current sensor 182.
- the supplied DC power is obtained and transmitted to the power transmission side control circuit 181.
- the power transmission side control circuit 181 receives the AC power factor supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 and the power reception side converter circuit 171 received from the power reception side control circuit 183.
- the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 is controlled so that the DC power supplied to the in-vehicle battery B11 becomes a target value.
- the switching of the IGBT 140b the DC voltage supplied to the inverter circuit 141 is controlled, and the switching of the IGBTs 141a to 141d is controlled so that 180-degree rectangular wave energization is performed.
- the power reception side control circuit 183 receives the power from the power transmission side control circuit 181 and is supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 and the power reception side converter circuit.
- the AC voltage supplied to the power receiving circuit 17 from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected is controlled so that the DC power supplied to the in-vehicle battery B11 from 171 becomes a target value.
- the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171 is controlled by controlling the power receiving side converter circuit 171, and as a result, the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected.
- the AC voltage supplied to the power receiving circuit 17 is controlled.
- the DC voltage supplied to the power receiving side converter circuit 171 is controlled by controlling the switching of the IGBT 171 c, and is supplied to the power receiving circuit 17 from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected. Control AC voltage.
- the AC power supplied to the power receiving circuit 17 from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected is affected by the impedance of the power transmission side pad 10, the power receiving side pad 12 and the power receiving side resonance circuit 13. Therefore, the input voltage of the power receiving side converter circuit 171 that can be controlled by controlling the power receiving side converter circuit 171, that is, the output voltage of the rectifier circuit 170 is controlled to be supplied from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected. AC voltage can be controlled.
- the positional relationship between the power transmission side pad 10 and the power reception side pad 12 changes every time the vehicle is parked. This is because the parking position varies depending on the driver's operation each time the vehicle is parked.
- the positional relationship between the power transmission side pad 10 and the power reception side pad 12 also changes during parking. This is because the height from the ground surface to the bottom of the vehicle changes due to loading and unloading of luggage and getting on and off of people.
- the power transmission side converter circuit 140 changes to the inverter circuit 141.
- the inverter circuit 141 applies the power transmission side resonance circuit 11 to the power transmission side pad 10.
- the supplied AC voltage and the AC voltage supplied to the rectifier circuit 170 from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected are controlled so that the power factor is approximately 1, and the power receiving side converter circuit 171 is connected to the vehicle-mounted battery.
- the DC power supplied to B11 can be controlled to 1 kW.
- the power transmission side converter circuit 140 changes to the inverter circuit 141.
- the inverter circuit 141 applies the power transmitting side resonance circuit 11 to the power transmitting side pad 10.
- the supplied AC voltage and the AC voltage supplied to the rectifier circuit 170 from the power receiving side pad 12 to which the power receiving side resonance circuit 13 is connected are controlled so that the power factor is approximately 1, and the power receiving side converter circuit 171 is connected to the vehicle-mounted battery.
- the DC power supplied to B11 can be controlled to 1 kW. Even when the coupling coefficient changes from 0.13 to 0.25, the DC voltage supplied from the power transmission side converter circuit 140 to the inverter circuit 141 and the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171 are controlled. Thus, the target 1 kW DC power can be supplied to the in-vehicle battery B11 without reducing the power factor.
- the control circuit 18 uses, for example, a DC voltage supplied from the power transmission side converter circuit 140 to the inverter circuit 141 and a DC voltage supplied from the rectifier circuit 170 to the power reception side converter circuit 171.
- the DC power to be supplied to the in-vehicle battery B11 is increased to 0V or a sufficiently low voltage in a ramp shape, and is set as the target power. Specifically, the voltage command value is increased in a ramp shape.
- the control circuit 18 controls the DC voltage supplied from the power transmission side converter circuit 140 to the inverter circuit 141 and the power receiving side converter circuit 171 from the rectifier circuit 170 so that the AC power factor output from the power transmission circuit 14 becomes a target value.
- Finely adjust the DC voltage supplied to This can be done using a PI controller or the like.
- the target value of the DC power supplied to the in-vehicle battery B11 changes, the DC voltage supplied from the power transmission side converter circuit 140 to the inverter circuit 141 and the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171 are also changed. Raise or lower.
- the DC power supplied to the in-vehicle battery B11 reaches the target value, the DC voltage supplied from the power transmission side converter circuit 140 to the inverter circuit 141 so that the AC power factor output from the inverter circuit 141 becomes the target value.
- the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171 is finely adjusted. The same applies when the coupling coefficient changes.
- the contactless power supply device 1 can maintain the power factor at about 1 even when the coupling coefficient between the power transmission side pad 10 and the power reception side pad 12 is changed from 0.13 to 0.25, as shown in FIG.
- an increase in the AC current supplied from the inverter circuit 141 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 can be suppressed.
- a decrease in power transmission efficiency of the contactless power supply device 1 can be suppressed regardless of the value of the DC power supplied to the in-vehicle battery B11. Note that the alternating current is larger and the transmission efficiency is lower when the coupling coefficient is 0.25 than when the coupling coefficient is 0.13. This is illustrated in FIGS. 2 to 5.
- the control circuit 18 supplies the AC power factor supplied from the power transmission circuit 14 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected, and the power supply circuit 17 supplies the vehicle-mounted battery B11.
- the AC voltage supplied from the pad 12 to the power receiving circuit 17 is controlled to transmit power from the external battery B10 to the in-vehicle battery B11.
- the coupling coefficient between the power transmission side pad 10 and the power reception side pad 12 changes, the change in the power factor can be suppressed and predetermined power can be transmitted from the external battery B10 to the in-vehicle battery B11. Moreover, since it is not accompanied by the change of the fundamental frequency of the alternating current which the power transmission circuit 14 outputs, the frequency band which the non-contact electric power feeder 1 uses can be suppressed to the minimum.
- the control circuit 18 supplies the AC power factor supplied from the power transmission circuit 14 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected, and the power supply circuit 17 supplies the vehicle-mounted battery B11.
- the direct current voltage to be controlled is transmitted from the external battery B10 to the in-vehicle battery B11.
- the control circuit 18 controls the AC voltage supplied from the power transmission circuit 14 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 by controlling the power transmission circuit 14, and also receives power.
- the DC voltage supplied from the rectifier circuit 170 to the power receiving side converter circuit 171 is controlled by controlling the side converter circuit 171. Therefore, the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected and the DC voltage supplied from the rectifier circuit 170 to the power reception side converter circuit 171 can be reliably controlled. it can.
- the control circuit 18 controls the AC voltage supplied from the power transmission circuit 14 to the power transmission side pad 10 connected to the power transmission side resonance circuit 11 by controlling the power transmission side converter circuit 140. Therefore, the AC voltage supplied from the inverter circuit 141 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected can be reliably controlled.
- the control circuit 18 controls the inverter circuit 141 by the pulse width modulation method, as shown in FIG. 8, the voltage is switched while a current is flowing. That is, the IGBTs 141a to 141d are switched in a state where current is flowing. Therefore, the switching loss of the IGBTs 141a to 141d increases.
- the control circuit 18 controls the inverter circuit 141 with 180-degree rectangular wave energization. Therefore, as shown in FIGS. 2 and 3, the voltage is switched in a state where the current is sufficiently low and nearly zero. In other words, the IGBTs 141a to 141d are switched in a state where the current is sufficiently low and nearly zero. Therefore, the switching loss of the IGBTs 141a to 141d can be suppressed. Therefore, the power transmission efficiency of the non-contact power feeding device 1 can be improved.
- the power transmission side resonance circuit 11 and the power reception side resonance circuit 13 are the fixed capacitors 110 and 130 connected in parallel to the coils 100 and 120. Therefore, a resonance circuit can be reliably configured with the coils 100 and 120. In addition, the reliability of the element can be improved and the resonance circuit can be configured more reliably as compared with the case where the variable power mechanism is provided in the capacitor to control the power factor.
- the non-contact power feeding device 1 includes the power transmission side filter circuit 15 and the power reception side filter circuit 16.
- the power transmission side filter circuit 15 is set so that the impedance at the AC fundamental frequency supplied by the power transmission circuit 14 is smaller than the impedance of the resonance circuit constituted by the coil 100 and the power transmission side resonance circuit 11.
- the power reception side filter circuit 16 is set so that the impedance at the basic frequency of the alternating current supplied by the power transmission circuit 14 is smaller than the impedance of the resonance circuit constituted by the coil 120 and the power reception side resonance circuit 13. Therefore, the loss of the power transmission side filter circuit 15 and the power reception side filter circuit 16 can be suppressed. Therefore, the power transmission efficiency of the non-contact power feeding device 1 can be improved.
- the power transmission side filter circuit 15 and the power reception side filter circuit 16 are composed of fixed-inductance reactors 150 and 160 and fixed-capacitance capacitors 151 and 161 connected in series. It is set to the fundamental frequency of the alternating current supplied. Therefore, the loss of the power transmission side filter circuit 15 and the power reception side filter circuit 16 can be reliably suppressed. Therefore, the power transmission efficiency of the non-contact power feeding device 1 can be improved reliably. In addition, the reliability of the element can be improved and the filter circuit can be configured more reliably as compared with the case where the inductance and the capacitor are provided with a variable mechanism of inductance and capacitance to control the power factor. Furthermore, by increasing the impedance at a frequency other than the vicinity of the resonance frequency, unnecessary frequency components such as harmonic components can be reduced, and the frequency band used by the non-contact power feeding device 1 can be minimized.
- the control circuit 18 includes a power transmission side control circuit 181 that controls the power transmission circuit 14 and a power reception side control circuit 183 that controls the power reception circuit 17.
- the power transmission side control circuit 181 and the power reception side control circuit 183 transmit and receive information necessary for control by wireless communication. Therefore, the power transmission circuit 14 and the power reception circuit 17 can be reliably controlled.
- the power transmission side control circuit 181 calculates the power factor based on the detection result of the AC voltage and AC current supplied from the inverter circuit 141 to the power transmission side pad 10 to which the power transmission side resonance circuit 11 is connected. Although the example to ask is given, it is not restricted to this.
- the power transmission side control circuit 181 may obtain the power factor based on the switching timing of the IGBTs 141a to 141d.
- the non-contact power feeding device of the second embodiment will be described with reference to FIGS.
- the same or equivalent components as those of the contactless power supply device 1 of the first embodiment described above are denoted by the same reference numerals, and the description thereof will be given. Omitted or simplified.
- the non-contact power supply device of the second embodiment is obtained by deleting the power receiving side filter circuit and partially changing the configuration of the rectifier circuit with respect to the non-contact power supply device of the first embodiment.
- the non-contact power supply device 2 shown in FIG. 9 transmits power from the external battery B20 (DC power supply) to the in-vehicle battery B21 (power supply target) in a non-contact manner, similarly to the non-contact power supply device 1 of the first embodiment. Is a device for charging.
- the non-contact power feeding device 2 includes a power transmission side pad 20, a power transmission side resonance circuit 21, a power reception side pad 22, a power reception side resonance circuit 23, a power transmission circuit 24, a power transmission side filter circuit 25, a power reception circuit 27, And a control circuit 28.
- the power transmission side pad 20 includes a coil 200.
- the power transmission side resonance circuit 21 is a capacitor 210.
- the power receiving side pad 22 includes a coil 220.
- the power receiving side resonance circuit 23 is a capacitor 230.
- the power transmission side pad 20, the power transmission side resonance circuit 21, the power reception side pad 22, and the power reception side resonance circuit 23 are the same as the power transmission side pad 10, the power transmission side resonance circuit 11, the power reception side pad 12, and the power reception side resonance circuit 13 of the first embodiment. It is the same configuration.
- the power transmission circuit 24 includes a power transmission side converter circuit 240 (power transmission side DC / DC conversion circuit) and an inverter circuit 241 (power transmission side DC / AC conversion circuit).
- the power transmission side converter circuit 240 includes a capacitor 240a, an IGBT 240b, a reactor 240c, a capacitor 240d, and a diode 240e.
- the inverter circuit 241 includes IGBTs 241a to 241d.
- the power transmission circuit 24 has the same configuration as the power transmission circuit 14 of the first embodiment.
- the power transmission side filter circuit 25 includes a reactor 250 and a capacitor 251 and has the same configuration as that of the power transmission side filter circuit 15 of the first embodiment. However, the non-contact power feeding device 2 does not include a circuit corresponding to the power receiving side filter circuit 16 of the first embodiment.
- the power receiving circuit 27 includes a rectifying circuit 270 (power receiving side AC / DC converting circuit) and a power receiving side converter circuit 271 (power receiving side DC / DC converting circuit).
- the rectifier circuit 270 includes diodes 270a to 270d, a reactor 270e, and a capacitor 270f.
- the diodes 270a to 270d have the same configuration as the diodes 170a to 170d of the first embodiment.
- Reactor 270e and capacitor 270f are elements for constituting a filter circuit for removing a predetermined frequency component included in the direct current converted by diodes 270a to 270d.
- One end of the reactor 270e is connected to the cathodes of the diodes 270a and 270c.
- One end of the capacitor 270f is connected to the other end of the reactor 270e, and the other end is connected to the anodes of the diodes 270b and 270d.
- the power receiving side converter circuit 271 includes a capacitor 271a, a reactor 271b, an IGBT 271c, a diode 271d, and a capacitor 271e.
- the capacitor 271a also serves as the capacitor 270f of the rectifier circuit 270.
- the capacitor 271a, the reactor 271b, the IGBT 271c, the diode 271d, and the capacitor 271e have the same configuration as the capacitor 171a, the reactor 171b, the IGBT 171c, the diode 171d, and the capacitor 171e of the first embodiment.
- the control circuit 28 includes a power transmission side current sensor 280, a power transmission side control circuit 281, a power reception side current sensor 282, and a power reception side control circuit 283, and has the same configuration as the control circuit 18 of the first embodiment. .
- the operation of the contactless power supply device 2 is the same as that of the contactless power supply device 1 of the first embodiment.
- the power transmission side converter circuit 240 supplies the inverter circuit 241.
- the inverter circuit 241 supplies the power transmitting side pad 20 to which the power transmitting side resonance circuit 21 is connected.
- the AC voltage and the AC voltage supplied to the rectifier circuit 170 from the power receiving side pad 22 to which the power receiving side resonance circuit 23 is connected are controlled, and the power factor is supplied to approximately 1, and the power receiving side converter circuit 271 supplies the vehicle-mounted battery B21.
- the direct current power can be controlled to 1 kW.
- the power is supplied from the power transmission side converter circuit 240 to the inverter circuit 241 as shown in FIG.
- the inverter circuit 241 supplies the power transmitting side pad 20 to which the power transmitting side resonance circuit 21 is connected.
- the AC voltage and the AC voltage supplied to the rectifier circuit 170 from the power receiving side pad 22 to which the power receiving side resonance circuit 23 is connected are controlled, and the power factor is supplied to approximately 1, and the power receiving side converter circuit 271 supplies the vehicle-mounted battery B21.
- the direct current power can be controlled to 1 kW. Even when the coupling coefficient changes from 0.13 to 0.25, the DC voltage supplied from the power transmission side converter circuit 240 to the inverter circuit 241 and the DC voltage supplied from the rectifier circuit 270 to the power reception side converter circuit 271 are controlled. By doing so, the target 1 kW DC power can be supplied to the in-vehicle battery B21 without reducing the power factor.
- the contactless power supply device 2 can maintain the power factor at about 1 even when the coupling coefficient between the power transmission side pad 20 and the power reception side pad 22 changes from 0.13 to 0.25, as shown in FIG.
- an increase in the AC current supplied from the inverter circuit 241 to the power transmission side pad 20 connected to the power transmission side resonance circuit 21 can be suppressed.
- a decrease in power transmission efficiency of the non-contact power feeding device 2 can be suppressed as compared with the conventional case regardless of the value of the DC power supplied to the in-vehicle battery B ⁇ b> 21.
- shaft of FIG. 13 are represented as an infinite number of electric current and electric power.
- the characteristics of the AC voltage input to the rectifier circuit 270 and the DC voltage output from the rectifier circuit 270 have the same configuration as the first embodiment even without the power receiving side filter circuit.
- the contactless power supply device of the third embodiment transmits power from the external battery to the in-vehicle battery, whereas the configuration of the power transmission circuit and the power reception circuit and the control circuit are all controlled. It is possible to transmit power from an in-vehicle battery to an external battery.
- the non-contact power supply device 3 shown in FIG. 14 transmits power from the external battery B30 (DC power supply) to the in-vehicle battery B31 (power supply target) in a non-contact manner, similarly to the non-contact power supply device 1 of the first embodiment, and the in-vehicle battery B31. Is a device for charging. Moreover, it is also a device that can transmit power from the in-vehicle battery B31 to the external battery B30 in a contactless manner and charge the external battery B30.
- the non-contact power feeding device 3 includes a power transmission side pad 30, a power transmission side resonance circuit 31, a power reception side pad 32, a power reception side resonance circuit 33, a power transmission circuit 34, a power transmission side filter circuit 35, and a power reception side filter circuit 36.
- the power transmission side pad 30 includes a coil 300.
- the power transmission side resonance circuit 31 is a capacitor 310.
- the power receiving side pad 32 includes a coil 320.
- the power receiving side resonance circuit 33 is a capacitor 330.
- the power transmission side pad 30, the power transmission side resonance circuit 31, the power reception side pad 32, and the power reception side resonance circuit 33 are the same as the power transmission side pad 10, the power transmission side resonance circuit 11, the power reception side pad 12, and the power reception side resonance circuit 13 of the first embodiment. It is the same configuration.
- the power transmission circuit 34 is a circuit that converts direct current supplied from the external battery B30 into alternating current and supplies the alternating current to the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected. Moreover, it is also a circuit which can convert the alternating current supplied from the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected into a direct current and supply it to the external battery B30.
- the power transmission circuit 34 includes a power transmission side converter circuit 340 (power transmission side DC / DC conversion circuit) and an inverter circuit 341 (power transmission side DC / AC conversion circuit).
- the power transmission side converter circuit 340 is a circuit that converts the direct current supplied from the external battery B30 into a different direct current and supplies it to the inverter circuit 341. Specifically, this is a circuit that steps down the direct current supplied from the external battery B30 and supplies it to the inverter circuit 341. Moreover, it is also a circuit which can convert the direct current supplied from the inverter circuit 341 into a different direct current and supply it to the external battery B30. Specifically, it is also a circuit capable of boosting the direct current supplied from the inverter circuit 341 and supplying it to the external battery B30. It is a known bidirectional buck-boost converter circuit.
- the power transmission side converter circuit 340 includes a capacitor 340a, an IGBT 340b, a reactor 340c, a capacitor 340d, and an IGBT 340e.
- the diode 140e of the power transmission side converter circuit 140 of the first embodiment is replaced with an IGBT 340e having a freewheel diode connected in reverse parallel between the collector and the emitter.
- the inverter circuit 341 is a circuit that converts direct current supplied from the power transmission side converter circuit 340 into alternating current of a predetermined frequency and supplies the alternating current to the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected. Further, it is a circuit that can rectify the alternating current supplied from the power transmission side pad 30 connected to the power transmission side resonance circuit 31 to convert it into direct current and supply it to the power transmission side converter circuit 340.
- the inverter circuit 341 includes IGBTs 341a to 341d and has the same configuration as the inverter circuit 141 of the first embodiment. The inverter circuit 341 can rectify and convert the alternating current supplied from the power transmission side pad 30 connected to the power transmission side resonance circuit 31 to a direct current by a free wheel diode, and supply the direct current to the power transmission side converter circuit 340.
- the power transmission side filter circuit 35 includes a reactor 350 and a capacitor 351.
- the power reception side filter circuit 36 includes a reactor 360 and a capacitor 361.
- the power transmission side filter circuit 35 and the power reception side filter circuit 36 have the same configuration as the power transmission side filter circuit 15 and the power reception side filter circuit 16 of the first embodiment.
- the power receiving circuit 37 is a circuit that converts alternating current supplied from the power receiving side pad 32 connected to the power receiving side resonance circuit 33 into direct current and supplies the direct current to the in-vehicle battery B31. Moreover, it is also a circuit which can convert the direct current supplied from the vehicle-mounted battery B31 into an alternating current and supply it to the power receiving side pad 32 to which the power receiving side resonance circuit 33 is connected.
- the power reception circuit 37 includes a rectifier circuit 370 (power reception side AC / DC conversion circuit) and a power reception side converter circuit 371 (power reception side DC / DC conversion circuit).
- the rectifier circuit 370 is a circuit that rectifies and converts the alternating current supplied from the power receiving side pad 32 connected to the power receiving side resonance circuit 33 to direct current, and supplies the direct current to the power receiving side converter circuit 371. Further, it is a circuit that can convert the direct current supplied from the power receiving side converter circuit 371 into an alternating current and supply it to the power receiving side pad 32 to which the power receiving side resonance circuit 33 is connected.
- the rectifier circuit 370 is obtained by replacing the diodes 170a to 170d of the rectifier circuit 170 of the first embodiment with IGBTs 370a to 370d having freewheel diodes connected in reverse parallel between the collector and the emitter.
- the power receiving side converter circuit 371 is a circuit that converts the direct current supplied from the rectifier circuit 370 into a direct current having a different voltage and supplies the direct current to the in-vehicle battery B31. Specifically, it is a circuit that boosts the direct current supplied from the rectifier circuit 370 and supplies it to the in-vehicle battery B31. Moreover, it is also a circuit which can convert the direct current supplied from the vehicle-mounted battery B31 into a direct current having a different voltage and supply the direct current to the rectifier circuit 370. Specifically, the direct current supplied from the vehicle-mounted battery B31 is stepped down and supplied to the rectifier circuit 370. It is a known bidirectional buck-boost converter circuit.
- the power receiving side converter circuit 371 includes a capacitor 371a, a reactor 371b, IGBTs 371c and 371d, and a capacitor 371e.
- the diode 171d of the power receiving side converter circuit 171 of the first embodiment is replaced with an IGBT 371d having a free wheel diode connected in reverse parallel between the collector and the emitter.
- the control circuit 38 is a circuit that controls the power transmission circuit 34 and the power reception circuit 37 in order to transmit power from the external battery B30 to the in-vehicle battery B31, similarly to the control circuit 18 of the first embodiment. Further, unlike the control circuit 18 of the first embodiment, it is also a circuit that controls the power transmission circuit 34 and the power reception circuit 37 in order to transmit power from the in-vehicle battery B31 to the external battery B30. Specifically, the AC power factor supplied from the power receiving circuit 37 to the power receiving side pad 32 connected to the power receiving side resonance circuit 33 and the DC power supplied from the power transmitting circuit 34 to the external battery B30 are the target values.
- the control circuit 38 includes power transmission side current sensors 380 and 384, a power transmission side control circuit 381, power reception side current sensors 382 and 385, and a power reception side control circuit 383.
- the power transmission side current sensor 380 has the same configuration as the power transmission side current sensor 180 of the first embodiment.
- the power transmission side current sensor 384 is an element that detects a direct current supplied from the power transmission side converter circuit 340 to the external battery B30 and outputs a detection result.
- the power transmission side current sensor 384 is provided so as to clamp the wiring to the wiring connecting the power transmission side converter circuit 340 and the external battery B30.
- the output end of the power transmission side current sensor 384 is connected to the power transmission side control circuit 381.
- the power transmission side control circuit 381 is connected to the power transmission circuit 34 and the power transmission side current sensors 380 and 384, transmits and receives information necessary for control to and from the power reception side control circuit 183 by wireless communication, and transmits the power transmission side converter circuit 340 and the inverter. This circuit controls the circuit 341. Similar to the power transmission side control circuit 181 of the first embodiment, the power transmission side control circuit 381 obtains the power factor of alternating current supplied from the inverter circuit 341 to the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected. To the side control circuit 383.
- the AC power factor supplied from the inverter circuit 341 to the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected, and the power reception side control circuit 383 received from the power reception side converter circuit 371 is supplied to the in-vehicle battery B31.
- the AC voltage supplied from the inverter circuit 341 to the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected is controlled so that the direct current power to be a target value.
- the DC voltage supplied to the inverter circuit 341 is controlled, and the switching of the IGBTs 341a to 341d is controlled so that 180-degree rectangular wave energization is performed. .
- the power transmission side control circuit 381 is a voltage supplied from the power transmission side converter circuit 340 to the external battery B30 in order to transmit power from the in-vehicle battery B31 to the external battery B30.
- the DC power supplied from the power transmission circuit 34 to the external battery B30 is obtained based on the detection result of the power transmission side current sensor 384 and transmitted to the power reception side control circuit 383.
- the direct current voltage supplied from the inverter circuit 341 to the power transmission side converter circuit 340 is controlled so that the direct current power to be the target value.
- the DC voltage supplied to the power transmission side converter circuit 340 is controlled by turning off the IGBT 340b and controlling the switching of the IGBT 340e.
- the power transmission side control circuit 381 is connected to the gates of the IGBTs 340b, 340e, and 341a to 341d. Further, the connection points of the IGBTs 341a and 341b, the connection point of the IGBTs 341c and 341d, and one end and the other end of the capacitor 340a are respectively connected. Further, the power transmission side current sensors 380 and 384 are connected to the output terminals, respectively.
- the power receiving side current sensor 382 has the same configuration as the power receiving side current sensor 182 of the first embodiment.
- the power receiving side current sensor 385 is an element that detects an alternating current supplied from the rectifying circuit 370 to the power receiving side pad 32 connected to the power receiving side resonance circuit 33 and outputs a detection result.
- the power receiving side current sensor 385 is provided so as to clamp the wiring to the wiring connecting the rectifying circuit 370 and the power receiving side filter circuit 36.
- the output end of the power receiving side current sensor 385 is connected to the power receiving side control circuit 383.
- the power reception side control circuit 383 is connected to the power reception circuit 37 and the power reception side current sensors 382 and 385, and transmits and receives information necessary for control to and from the power transmission side control circuit 381 by wireless communication to control the power reception circuit 37. It is. Similarly to the power receiving side control circuit 183 of the first embodiment, the power receiving side control circuit 383 obtains DC power supplied from the power receiving circuit 37 to the in-vehicle battery B31 and transmits it to the power transmission side control circuit 381. The AC power factor received from the power transmission side control circuit 381 and supplied from the inverter circuit 341 to the power transmission side pad 30 connected to the power transmission side resonance circuit 31, and supplied from the power reception side converter circuit 371 to the vehicle-mounted battery B31.
- the direct current voltage supplied from the rectifier circuit 370 to the power receiving side converter circuit 371 is controlled so that the direct current power thus obtained becomes a target value.
- the DC voltage supplied to the power receiving side converter circuit 371 is controlled by turning off the IGBT 371d and controlling the switching of the IGBT 371c.
- the power receiving side control circuit 383 is different from the power receiving side control circuit 183 of the first embodiment, in order to transmit power from the in-vehicle battery B31 to the external battery B30, the power receiving side to which the power receiving side resonance circuit 33 is connected from the rectifier circuit 370. Based on the detection result of the AC voltage supplied to the side pad 32 and the detection result of the power reception side current sensor 385, the AC force supplied from the rectifier circuit 370 to the power reception side pad 32 to which the power reception side resonance circuit 33 is connected. The rate is obtained and transmitted to the power transmission side control circuit 381.
- the AC voltage supplied from the rectifier circuit 370 to the power receiving side pad 32 to which the power receiving side resonance circuit 33 is connected is controlled so that the direct current power to be a target value. Specifically, by turning off the IGBT 371c and controlling the switching of the IGBT 371d, the DC voltage supplied to the rectifier circuit 370 is controlled, and the switching of the IGBTs 370a to 370d is controlled so that 180-degree rectangular wave energization is performed. .
- the power receiving side control circuit 383 is connected to the gates of the IGBTs 370a to 370d, 371c, and 371d. Further, the capacitor 371e is connected to one end and the other end of the capacitor 371e, the connection points of the IGBTs 370a and 370b, and the connection points of the IGBTs 370c and 370d, respectively. Further, the power receiving side current sensors 382 and 385 are connected to the output terminals, respectively.
- the power receiving side control circuit 383 Based on the detection result of the voltage supplied from the rectifier circuit 370 to the power receiving side pad 32 connected to the power receiving side resonance circuit 33 and the detection result of the power receiving side current sensor 385, the power receiving side control circuit 383 The power factor of the alternating current supplied to the power receiving side pad 32 connected to the power receiving side resonance circuit 33 is obtained and transmitted to the power transmission side control circuit 381.
- the power transmission side control circuit 381 transfers from the power transmission side converter circuit 340 to the external battery B30 based on the detection result of the voltage supplied from the power transmission side converter circuit 340 to the external battery B30 and the detection result of the power transmission side current sensor 384. The supplied DC power is obtained and transmitted to the power receiving side control circuit 383.
- the power receiving side control circuit 383 is supplied from the rectifying circuit 370 to the power receiving side pad 32 to which the power receiving side resonance circuit 33 is connected, and from the power transmitting side converter circuit 340 received from the power transmitting side control circuit 381 to the outside.
- the AC voltage supplied from the rectifier circuit 370 to the power receiving side pad 32 connected to the power receiving side resonance circuit 33 is controlled so that the DC power supplied to the battery B30 becomes a target value.
- the IGBT 371c and controlling the switching of the IGBT 371d the DC voltage supplied to the rectifier circuit 370 is controlled, and the switching of the IGBTs 370a to 370d is controlled so that 180-degree rectangular wave energization is performed. .
- the power transmission side control circuit 381 receives from the power reception side control circuit 383, the AC power factor supplied from the rectifier circuit 370 to the power reception side pad 32 connected to the power reception side resonance circuit 33, and the power transmission side converter circuit.
- the direct current voltage supplied from the inverter circuit 341 to the power transmission side converter circuit 340 is controlled so that the direct current power supplied from the inverter 340 to the external battery B30 becomes a target value.
- the DC voltage supplied to the power transmission side converter circuit 340 is controlled by turning off the IGBTs 341a to 341d, turning off the IGBT 340b, and controlling the switching of the IGBT 340e.
- the same effect as that of the first embodiment corresponding to the same configuration can be obtained.
- the power receiving side converter circuit 371 can step down the direct current supplied from the in-vehicle battery B31 and supply it to the rectifier circuit 370.
- the rectifier circuit 370 can convert the direct current supplied from the power receiving side converter circuit 371 into an alternating current and supply it to the power receiving side pad 32 to which the power receiving side resonance circuit 33 is connected.
- the inverter circuit 341 can rectify the alternating current supplied from the power transmission side pad 30 to which the power transmission side resonance circuit 31 is connected, convert the alternating current into direct current, and supply the direct current to the power transmission side converter circuit 340.
- the power transmission side converter circuit 340 can step up the direct current supplied from the inverter circuit 341 and supply it to the external battery B30.
- the contactless power supply device of the fourth embodiment is a partial change of the configurations of the power transmission side filter circuit and the power reception side filter circuit with respect to the contactless power supply device of the first embodiment, and the power transmission side filter circuit and power transmission side An insulating transformer is provided between the power transmission side pads to which the resonance circuit is connected and between the power reception side pad to which the power reception side filter circuit and the power reception side resonance circuit are connected.
- the non-contact power supply device 4 shown in FIG. 15 is a device that transmits power from the external battery B40 (DC power supply) to the in-vehicle battery B41 (power supply target) in a non-contact manner and charges the in-vehicle battery B41.
- the non-contact power feeding device 4 includes a power transmission side pad 40, a power transmission side resonance circuit 41, a power reception side pad 42, a power reception side resonance circuit 43, a power transmission circuit 44, a power transmission side filter circuit 45, and a power reception side filter circuit 46.
- the power transmission side pad 40 includes a coil 400.
- the power transmission side resonance circuit 41 is a capacitor 410.
- the power receiving side pad 42 includes a coil 420.
- the power receiving side resonance circuit 43 is a capacitor 430.
- the power transmission side pad 40, the power transmission side resonance circuit 41, the power reception side pad 42, and the power reception side resonance circuit 43 are the same as the power transmission side pad 10, the power transmission side resonance circuit 11, the power reception side pad 12, and the power reception side resonance circuit 13 of the first embodiment. It is the same configuration.
- the power transmission circuit 44 includes a power transmission side converter circuit 440 (power transmission side DC / DC conversion circuit) and an inverter circuit 441 (power transmission side DC / AC conversion circuit).
- the power transmission side converter circuit 440 includes a capacitor 440a, an IGBT 440b, a reactor 440c, a capacitor 440d, and a diode 440e.
- the inverter circuit 441 includes IGBTs 441a to 441d.
- the power transmission circuit 44 has the same configuration as the power transmission circuit 14 of the first embodiment.
- the power transmission side filter circuit 45 includes reactors 450 and 452 and capacitors 451 and 453.
- Reactor 450 and capacitor 451 are connected in series. Specifically, one end of reactor 450 is connected to one end of capacitor 451. The other end of the reactor 450 is connected to the insulating transformer 49, and the other end of the capacitor 451 is connected to the connection point of the IGBTs 441a and 441b.
- Reactor 452 and capacitor 453 are connected in series. Specifically, one end of the reactor 452 is connected to one end of the capacitor 453. The other end of the reactor 452 is connected to the insulating transformer 49, and the other end of the capacitor 453 is connected to the connection point of the IGBTs 441c and 441d.
- the power transmission side filter circuit 45 is set so that the impedance at the basic frequency of alternating current supplied by the power transmission circuit 44 is smaller than the impedance of the resonance circuit constituted by the power transmission side pad 40 and the power transmission side resonance circuit 41.
- the inductances of reactors 450 and 452 and the capacities of capacitors 451 and 453 are set so that the resonance frequency becomes the fundamental frequency of alternating current supplied by power transmission circuit 44.
- the inductances of the reactors 450 and 452 and the capacitances of the capacitors 451 and 453 are set to be equal to each other.
- the power reception circuit 47 includes a rectification circuit 470 (power reception side AC / DC conversion circuit) and a power reception side converter circuit 471 (power reception side DC / DC conversion circuit).
- the rectifier circuit 470 includes diodes 470a to 470d.
- the power receiving side converter circuit 471 includes a capacitor 471a, a reactor 471b, an IGBT 471c, a diode 471d, and a capacitor 471e.
- the control circuit 48 includes a power transmission side current sensor 480, a power transmission side control circuit 481, a power reception side current sensor 482, and a power reception side control circuit 483.
- the power receiving circuit 47 and the control circuit 48 have the same configuration as the power receiving circuit 17 and the control circuit 18 of the first embodiment.
- the insulating transformer 49 is connected between the power transmission side filter circuit 45 and the power transmission side pad 40 to which the power transmission side resonance circuit 41 is connected, and between the power reception side pad 42 and the power reception side filter circuit 46 to which the power reception side resonance circuit 43 is connected.
- the insulation transformer 49 includes a power transmission side insulation transformer 490 and a power reception side insulation transformer 491.
- the power transmission side insulating transformer 490 is connected between the power transmission side filter circuit 45 and the power transmission side pad 40 to which the power transmission side resonance circuit 41 is connected, and the power transmission side filter circuit 45 and the power transmission to which the power transmission side resonance circuit 41 is connected. This is a device for electrically insulating the side pad 40.
- the power transmission side insulating transformer 490 includes a primary coil 490a and a secondary coil 490b. One end of the primary coil 490 a is connected to the other end of the reactor 450, and the other end is connected to the other end of the reactor 452. One end of the secondary coil 490b is connected to one end of the coil 400 connected to the capacitor 410 via the wiring cable 492, and the other end is connected to the other end of the coil 400 connected to the capacitor 410 via the wiring cable 492. Has been.
- the power receiving side insulating transformer 491 is connected between the power receiving side pad 42 to which the power receiving side resonance circuit 43 is connected and the power receiving side filter circuit 46, and the power receiving side pad 42 to which the power receiving side resonance circuit 43 is connected and the power receiving side filter circuit. This is a device for electrically insulating 46.
- the power receiving side insulating transformer 491 includes a primary coil 491a and a secondary coil 491b. One end of the primary coil 491a is connected to one end of the coil 420 to which the capacitor 430 is connected via the wiring cable 493, and the other end is connected to the other end of the coil 420 to which the capacitor 430 is connected via the wiring cable 493. Has been. One end and the other end of the secondary coil 491b are connected to the power receiving filter circuit 46, respectively.
- the power receiving side filter circuit 46 includes reactors 460 and 462 and capacitors 461 and 463.
- Reactor 460 and capacitor 461 are connected in series. Specifically, one end of reactor 460 is connected to one end of capacitor 461. The other end of the reactor 460 is connected to one end of the secondary coil 491b, and the other end of the capacitor 461 is connected to the connection point of the diodes 470c and 470d.
- the reactor 462 and the capacitor 463 are connected in series. Specifically, one end of the reactor 462 is connected to one end of the capacitor 463. The other end of the reactor 462 is connected to the other end of the secondary coil 491b, and the other end of the capacitor 463 is connected to a connection point of the diodes 470a and 470b.
- the power reception side filter circuit 46 is set so that the impedance at the basic frequency of alternating current supplied by the power transmission circuit 44 is smaller than the impedance of the resonance circuit constituted by the power reception side pad 42 and the power reception side resonance circuit 43.
- the inductances of reactors 460 and 462 and the capacities of capacitors 461 and 463 are set so that the resonance frequency becomes the fundamental frequency of alternating current supplied by power transmission circuit 44.
- the inductances of the reactors 460 and 463 and the capacitances of the capacitors 461 and 462 are set to be equal to each other.
- the same effect as that of the first embodiment corresponding to the same configuration can be obtained.
- the power transmission side filter circuit 45 includes two sets of reactors and capacitors connected in series, which have the same inductance and capacitance, a reactor 450 and a capacitor 451, a reactor 452, and a capacitor 453.
- the reactor 450 and the capacitor 451 which are one series-connected reactor and capacitor are connected between one output end of the power transmission circuit 44 and one end of the power transmission side pad 40 to which the power transmission side resonance circuit 41 is connected.
- the other reactor 452 and capacitor 453, which are the other series-connected reactor and capacitor, are connected between the other output end of the power transmission circuit 44 and the other end of the power transmission side pad 40 to which the power transmission side resonance circuit 41 is connected. Yes.
- the power receiving side filter circuit 46 includes two sets of reactors and capacitors connected in series, which have the same inductance and capacitance, a reactor 460 and a capacitor 461, a reactor 462 and a capacitor 463.
- One series-connected reactor and capacitor that is, a reactor 460 and a capacitor 461 are connected between one end of the power receiving side pad 42 to which the power receiving side resonance circuit 43 is connected and one input terminal of the power receiving circuit 47.
- the other series-connected reactor and capacitor that is, the reactor 462 and the capacitor 463 are connected between the other end of the power receiving side pad 42 to which the power receiving side resonance circuit 43 is connected and the other input end of the power receiving circuit 47. Yes.
- a power transmission side insulation transformer 490 and a power reception side insulation transformer 491 are provided. Therefore, an electric shock can be prevented and safety can be improved.
- the power transmission side filter circuit 45 and the power reception side filter circuit 46 are provided with two sets of reactors 450 and 452 and reactors 460 and 462, respectively.
- the reactors 450 and 452, and the reactor 460, 462 may be a coupled reactor configured to share a core. It is possible to balance the inductance of the two sets of reactors and improve the noise removal performance.
- the power transmission side filter circuit and the power reception side filter circuit are configured by a reactor and a capacitor.
- the reactor is configured by combining a plurality of elements. There may be.
- the degree of freedom in designing the reactor current capacity and winding withstand voltage can be improved, and the filter circuit can be reliably configured and the loss can be reduced.
- the capacitor may be configured by combining a plurality of elements. The degree of freedom in designing the withstand voltage and current capacity of the capacitor can be improved, and the filter circuit can be reliably configured and the loss can be reduced.
- the power transmission side resonance circuit and the power reception side resonance circuit are capacitors connected in parallel to the coil, but the present invention is not limited to this.
- a capacitor connected in series to the coil may be used.
- a combination of a capacitor and a reactor may be used.
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Abstract
Description
まず、図1~図9を参照して、第1実施形態に係る非接触給電装置を説明する。
図1は、第1実施形態の非接触給電装置1の構成を示す。
より具体的には、IGBT140bのスイッチングを制御することでインバータ回路141に供給される直流電圧を制御するとともに、180度矩形波通電となるようにIGBT141a~141dのスイッチングを制御する。つまり、インバータ回路141を制御することで、インバータ回路141から送電側共振回路11の接続された送電側パッド10に供給される交流電圧を制御するのではなく、インバータ回路141に供給される直流電圧を制御することで、インバータ回路141から送電側共振回路11の接続された送電側パッド10に供給される交流電圧を制御する。送電側制御回路181は、IGBT140b、141a~141dのゲートにそれぞれ接続されている。また、IGBT141a、141bの接続点及びIGBT141c、141dの接続点にそれぞれ接続されている。さらに、送電側電流センサ180の出力端に接続されている。
より具体的には、受電側コンバータ回路171を制御することで、整流回路170から受電側コンバータ回路171に供給される直流電圧を制御する。さらに具体的には、IGBT171cのスイッチングを制御することで受電側コンバータ回路171に供給される直流電圧を制御する。受電側制御回路183は、IGBT171cのゲートに接続されている。また、コンデンサ171eの一端及び他端にそれぞれ接続されている。さらに、受電側電流センサ182の出力端に接続されている。
次に、図10~図13を参照して、第2実施形態の非接触給電装置について説明する。
この第2実施形態及びそれ以降の実施形態に係る非接触給電装置において、前述した第1実施形態の非接触給電装置1と同一又は同等の構成要素には同一符号を付して、その説明を省略又は簡略化する。
第2実施形態の非接触給電装置は、第1実施形態の非接触給電装置に対して、受電側フィルタ回路を削除するとともに、整流回路の構成を一部変更したものである。
次に、図14を参照して、第3実施形態の非接触給電装置について説明する。
この第3実施形態の非接触給電装置は、第1実施形態の非接触給電装置が外部バッテリから車載バッテリに送電するのに対し、送電回路及び受電回路の構成、並びに、制御回路の制御を一部変更して、車載バッテリから外部バッテリにも送電できるようにしたものである。
次に、図15を参照して、第4実施形態の非接触給電装置について説明する。
この第4実施形態の非接触給電装置は、第1実施形態の非接触給電装置に対して、送電側フィルタ回路及び受電側フィルタ回路の構成を一部変更するとともに、送電側フィルタ回路と送電側共振回路の接続された送電側パッドの間、及び、受電側フィルタ回路と受電側共振回路の接続された受電側パッドの間に、それぞれ絶縁トランスを設けるようにしたものである。
Claims (14)
- コイル(100)を有し、交流電力が供給されることで磁束を発生する送電側パッド(10)と、
前記送電側パッドに接続され、前記送電側パッドのコイルとともに共振回路を構成する送電側共振回路(11)と、
別のコイル(120)を有し、前記送電側パッドの発生した磁束が鎖交することで交流を発生する受電側パッド(12)と、
前記受電側パッドに接続され、前記受電側パッドのコイルとともに共振回路を構成する受電側共振回路(13)と、
直流電源に接続されるとともに、前記送電側パッドに接続され、前記直流電源から供給される直流を交流に変換して前記送電側共振回路の接続された前記送電側パッドに供給する送電回路(14)と、
前記受電側共振回路の接続された前記受電側パッドに接続されるとともに、給電対象に接続され、前記受電側パッドから供給される交流を直流に変換して前記給電対象に供給する受電回路(17)と、
前記送電回路及び前記受電回路に接続され、前記送電回路及び前記受電回路を制御する制御回路(18)と、
を備えた非接触給電装置において、
前記制御回路は、前記送電回路から前記送電側パッドに供給される交流の力率、及び、前記受電回路から前記給電対象に供給される直流電力がそれぞれ目標値となるように、前記送電回路から前記送電側パッドに供給される交流電圧、及び、前記受電側パッドから前記受電回路に供給される交流電圧を制御して、前記直流電源から前記給電対象に送電するように構成されていることを特徴とする非接触給電装置。 - 前記受電回路は、前記受電側パッドに接続され、前記受電側パッドから供給される交流を直流に変換して出力する受電側交流/直流変換回路(170)と、
前記受電側交流/直流変換回路及び前記給電対象に接続され、前記受電側交流/直流変換回路から供給される直流を電圧の異なる直流に変換して前記給電対象に供給する受電側直流/直流変換回路(171)と、
を有し、
前記制御回路は、前記送電回路から前記送電側パッドに供給される交流の力率、及び、前記受電回路から前記給電対象に供給される直流電力がそれぞれ目標値となるように、前記送電回路から前記送電側パッドに供給される交流電圧、及び、前記受電側交流/直流変換回路から前記受電側直流/直流変換回路に供給される直流電圧を制御して、前記直流電源から前記に送電するように構成されていることを特徴とする請求項1に記載の非接触給電装置。 - 前記制御回路は、前記送電回路を制御することで、前記送電回路から前記送電側パッドに供給される交流電圧を制御するとともに、前記受電側直流/直流変換回路を制御することで、前記受電側交流/直流変換回路から前記受電側直流/直流変換回路に供給される直流電圧を制御するように構成されていることを特徴とする請求項2に記載の非接触給電装置。
- 前記送電回路は、
前記直流電源に接続され、前記直流電源から供給される直流を電圧の異なる直流に変換して出力する送電側直流/直流変換回路(140)と、
前記送電側直流/直流変換回路及び前記送電側共振回路の接続された前記送電側パッドに接続され、前記送電側直流/直流変換回路から供給される直流を交流に変換して前記送電側共振回路の接続された前記送電側パッドに供給する送電側直流/交流変換回路(141)と、
を有し、
前記制御回路は、前記送電側直流/直流変換回路を制御することで、前記送電回路から前記送電側パッドに供給される交流電圧を制御するように構成されていることを特徴とする請求項3に記載の非接触給電装置。 - 前記制御回路は、前記送電側直流/交流変換回路を180度矩形波通電で制御するように構成されていることを特徴とする請求項4に記載の非接触給電装置。
- 前記受電側直流/直流変換回路(371)は、前記給電対象から供給される直流を電圧の異なる直流に変換して前記受電側交流/直流変換回路に供給可能であり、
前記受電側交流/直流変換回路(370)は、前記受電側直流/直流変換回路から供給される直流を交流に変換して前記受電側共振回路の接続された前記受電側パッドに供給可能であり、
前記送電側直流/交流変換回路(341)は、前記送電側共振回路の接続された前記送電側パッドから供給される交流を直流に変換して前記送電側直流/直流変換回路に供給可能であり、
前記送電側直流/直流変換回路(340)は、前記送電側直流/交流変換回路から供給される直流を電圧の異なる直流に変換して前記直流電源に供給可能であることを特徴とする請求項4又は5に記載の非接触給電装置。 - 前記送電側共振回路及び前記受電側共振回路は、コンデンサ(110、130)であることを特徴とする請求項1~6のいずれか1項に記載の非接触給電装置。
- 前記送電回路と、前記送電側パッドの間に接続され、前記送電回路の供給する交流の基本周波数におけるインピーダンスが、前記送電側パッドのコイルと前記送電側共振回路によって構成される共振回路のインピーダンスより小さい送電側フィルタ回路(15)と、
前記受電側パッドと前記受電回路の間に接続され、前記送電回路の供給する交流の基本周波数におけるインピーダンスが、前記受電側パッドのコイルと前記受電側共振回路によって構成される共振回路のインピーダンスより小さい受電側フィルタ回路(16)と、
を有することを特徴とする請求項1~7のいずれか1項に記載の非接触給電装置。 - 前記送電側フィルタ回路及び前記受電側フィルタ回路は、直列接続されたリアクトル及びコンデンサからなり、共振周波数が前記送電回路の供給する交流の基本周波数に設定されていることを特徴とする請求項8に記載の非接触給電装置。
- 前記送電側フィルタ回路(45)は、インダクタンス及び容量が互いに等しい、2組の直列接続されたリアクトル及びコンデンサからなり、一方の直列接続されたリアクトル及びコンデンサが、前記送電回路の一方の出力端と、前記送電側パッドの一端の間に接続され、他方の直列接続されたリアクトル及びコンデンサが、前記送電回路の他方の出力端と、前記送電側パッドの他端の間に接続され、
前記受電側フィルタ回路(46)は、インダクタンス及び容量が互いに等しい、2組の直列接続されたリアクトル及びコンデンサを備え、一方の直列接続されたリアクトル及びコンデンサが、前記受電側パッドの一端と、前記受電回路の一方の入力端の間に接続され、他方の直列接続されたリアクトル及びコンデンサが、前記受電側パッドの他端と、前記受電回路の他方の入力端の間に接続されていることを特徴とする請求項9に記載の非接触給電装置。 - 前記送電側フィルタ回路及び前記受電側フィルタ回路の少なくともいずれかの2組のリアクトルは、コアを共有して構成される結合リアクトルであることを特徴とする請求項10に記載の非接触給電装置。
- 前記送電側フィルタ回路及び前記受電側フィルタ回路の少なくともいずれかのリアクトルは、複数のリアクトルを組み合わせて構成されていることを特徴とする請求項8~11のいずれか1項に記載の非接触給電装置。
- 前記送電側フィルタ回路及び前記受電側フィルタ回路の少なくともいずれかのコンデンサは、複数のコンデンサを組み合わせて構成されていることを特徴とする請求項8~12のいずれか1項に記載の非接触給電装置。
- 前記制御回路は、
前記送電回路に接続され、前記送電回路を制御する送電側制御回路(181)と、
前記受電回路に接続され、前記受電回路を制御する受電側制御回路(183)と、
を有し、
前記送電側制御回路及び前記受電側制御回路は、制御に必要な情報を無線通信によって送受信するように構成されていることを特徴とする請求項1~13のいずれか1項に記載の非接触給電装置。
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