WO2016159093A1 - ワイヤレス受電装置及びワイヤレス電力伝送装置 - Google Patents
ワイヤレス受電装置及びワイヤレス電力伝送装置 Download PDFInfo
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- WO2016159093A1 WO2016159093A1 PCT/JP2016/060415 JP2016060415W WO2016159093A1 WO 2016159093 A1 WO2016159093 A1 WO 2016159093A1 JP 2016060415 W JP2016060415 W JP 2016060415W WO 2016159093 A1 WO2016159093 A1 WO 2016159093A1
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- circuit
- power
- power transmission
- wireless power
- power receiving
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Definitions
- the present invention relates to a wireless power receiving apparatus and a wireless power transmission apparatus.
- a wireless power transmission device has been proposed as a technique for charging a rechargeable battery of an electric vehicle.
- the magnetic resonance method is used particularly for the above-described applications.
- an inverter circuit that converts DC power into AC power and sends the AC power to a power feeding coil, a power feeding coil, and a first capacitor provided in parallel with the power feeding coil AC current received from the power receiving coil and the second LC parallel resonant part formed by the first LC parallel resonant part, the power receiving coil, and the second capacitor provided in parallel with the power receiving coil.
- a wireless power feeding system having a rectifier circuit that converts electric power into DC power has been proposed.
- Patent Document 2 proposes a short circuit using a switching element that protects the rectifier circuit from overvoltage.
- the short circuit disclosed in Patent Document 2 monitors the output voltage of the rectifier circuit, and when a value of the output voltage exceeding a preset reference voltage value is detected, the switching element operates to short the circuit.
- the circuit elements after the rectifier circuit are protected from overvoltage.
- a semiconductor element is used as a switching element used in this short circuit.
- the semiconductor element used as the switching element disclosed in Patent Document 2 has a parasitic capacitance structurally.
- This parasitic capacitance forms a loop connected to both ends of the power-reception-side resonance circuit in a state where the switching element is off, and reactive power is generated due to current flowing through the parasitic capacitance, resulting in a deterioration of the power factor. There is. In other words, if the same power is to be obtained, a large amount of current must be passed, resulting in power loss.
- the present invention has been made in view of the above problems, and a wireless power receiving device and a wireless power transmission device that suppress the occurrence of power loss due to reactive power during normal operation while protecting circuit elements when an overvoltage occurs.
- the purpose is to provide.
- a wireless power receiving device is a wireless power receiving device that wirelessly receives power from a wireless power transmitting device, and a power receiving coil that wirelessly receives power from a power transmitting side, and a power receiving side resonance connected to the power receiving coil.
- a power receiving side resonance circuit having a capacitor, a rectification circuit that rectifies the power received by the power receiving coil and outputs the rectified power to a load, a power reception side voltage detection unit that detects an output voltage of the rectification circuit, and an output of the power reception side resonance circuit
- a short circuit having a switching element connected between the output part of the rectifier circuit and the output part of the rectifier circuit, and a rectifier element inserted between the output part of the power reception side resonance circuit and the switching element, and a power receiving side voltage detection part
- a control circuit that operates the switching element when the value of the output voltage detected by the controller exceeds a preset reference voltage value.
- the switching element of the short circuit when the value of the output voltage detected by the power receiving side voltage detection unit exceeds a preset reference voltage value, the switching element of the short circuit is operated. Therefore, both ends of the power receiving coil of the power receiving side resonance circuit are short-circuited. As a result, the generated overvoltage is not output to the subsequent stage from the power reception side resonance circuit, and the circuit elements at the rear stage from the power reception side resonance circuit can be protected.
- the rectifying element inserted between the output part of the power receiving side resonance circuit and the switching element is provided, the current path to the parasitic capacitance of the switching element is cut off and the discharge of the parasitic capacitance is suppressed. . Thereby, generation
- the rectifier circuit may include a bridge type circuit in which four diodes are connected in a full bridge, and a smoothing capacitor in which the bridge type circuit is connected in parallel.
- the utilization efficiency of the power source can be increased.
- a stop signal for stopping the power transmission operation may be transmitted to the wireless power transmission apparatus at the same time or immediately after the control circuit operates the switching element.
- the operation of the wireless power transmission device stops when the value of the output voltage detected by the power receiving side voltage detection unit exceeds a preset reference voltage value, the circuit elements of the entire wireless power transmission device are protected. Can do.
- the operation time of the wireless power transmission device is stopped, the current application time to the short circuit is suppressed, so that the short circuit can be protected.
- a transformer circuit may be further provided between the output unit of the power receiving side resonance circuit and the input unit of the rectifier circuit.
- an inductor circuit may be further provided between the output unit of the power receiving side resonance circuit and the input unit of the rectifier circuit. In this case, it is possible to suppress noise during normal operation while protecting circuit elements when an overvoltage occurs.
- a wireless power transmission device includes the above wireless power receiving device and a wireless power transmission device.
- ADVANTAGE OF THE INVENTION According to this invention, the wireless power transmission apparatus which suppressed generation
- the present invention it is possible to provide a wireless power receiving apparatus and a wireless power transmission apparatus that protects circuit elements when an overvoltage occurs and suppresses power loss due to reactive power during normal operation.
- FIG. 3 is a partially enlarged view of a circuit configuration diagram illustrating a current path by a closed loop of a power receiving side resonance circuit and a short circuit in FIG. 2.
- FIG. 2 is a partially enlarged view of a circuit configuration diagram showing a current path by a closed loop of a power receiving side resonance circuit and a short circuit in FIG. 1.
- FIG. 2 is a partially enlarged view of a circuit configuration diagram illustrating a current path when a switching element of a short circuit in FIG. 1 is off.
- FIG. 2 is a partially enlarged view of a circuit configuration diagram showing a current path when a switching element of a short circuit in FIG. 1 is on. It is a flowchart which shows the protection operation
- FIG. 8 is a partially enlarged view of a circuit configuration diagram illustrating a current path when a switching element of the rectifier circuit in FIG. 7 is off.
- FIG. 8 is a partially enlarged view of a circuit configuration diagram illustrating a current path when a switching element of a short circuit in FIG. 7 is on.
- FIG. 1 is a circuit configuration diagram showing a wireless power transmission device according to a first embodiment of the present invention together with a load.
- the wireless power transmission device S1 includes a wireless power transmission device 100 and a wireless power reception device 200, as shown in FIG.
- the wireless power transmission apparatus 100 includes a power source 110, a power conversion circuit 120, and a power transmission side resonance circuit 130.
- the power supply 110 supplies DC power to the power conversion circuit 120.
- the power supply 110 is not particularly limited as long as it outputs DC power, and includes a DC power supply obtained by rectifying and smoothing a commercial AC power supply, or a switching power supply device such as a switching converter.
- the power conversion circuit 120 includes a power conversion unit 121 and a switch drive unit 122.
- the power conversion circuit 120 has a function of converting DC power supplied from the power source 110 into AC power.
- the power conversion unit 121 includes a switching circuit in which a plurality of switching elements are bridge-connected.
- a full bridge type circuit using four switching elements SW1 to SW4 is provided.
- the switching elements SW1 to SW4 include elements such as a MOS-FET (Metal Oxide Semiconductor-Field Effect Transistor) and an IGBT (Insulated Gate Bipolar Transistor).
- Each of the switching elements SW1 to SW4 controls on / off of each of the switching elements SW1 to SW4 according to the SW control signals SG1 to SG4 supplied from the switch driving unit 122, so that the input DC power supplied from the power supply 110 is obtained. Convert to AC power.
- the AC power converted by the power conversion circuit 120 is supplied to a power transmission coil L1 described later.
- the power transmission side resonance circuit 130 includes a power transmission coil L1 and power transmission side resonance capacitors C10 and C11.
- the power transmission coil L1 is formed using a litz wire or a single wire obtained by twisting a plurality of thin conductor wires. Examples of the power transmission coil L1 include a planar coil and a solenoid coil.
- the power transmission coil L1 forms an LC resonance circuit together with the power transmission side resonance capacitors C10 and C11.
- the power transmission side resonance capacitors C10 and C11 are formed by connecting a plurality of capacitors in series and parallel, and have a function of adjusting the resonance frequency of the LC resonance circuit.
- the power transmission side resonance capacitor C10 is connected in series to one end of the power transmission coil L1, and the power transmission side resonance capacitor C11 is connected in series to the other end of the power transmission coil L1.
- capacitors used as the power transmission side resonance capacitors C10 and C11 include ceramic capacitors.
- the power transmission side resonance capacitors C10 and C11 are connected in series to the power transmission coil L1, but the present invention is not limited thereto.
- only the power transmission side resonance capacitor C10 is connected to the power transmission coil L1. May be connected in series, and only the power transmission side resonance capacitor C10 may be connected in parallel to the power transmission coil L1, or the power transmission side resonance capacitor C10 may be connected in series to the power transmission coil L1.
- the capacitor C11 may be connected in parallel.
- the power transmission coil L1 of the power transmission side resonance circuit 130 configured as described above transmits the AC power converted by the power conversion circuit 120 to the wireless power receiving apparatus 200 described later wirelessly.
- the wireless power receiving apparatus 200 includes a power receiving side resonance circuit 210, a rectifying circuit 220, a power receiving side voltage detection unit 230, a short circuit 240, and a control circuit 250.
- the power transmission side resonance circuit 130 of the wireless power transmission device 100 and the power reception side resonance circuit 210 of the wireless power reception device 200 are magnetically coupled and supplied from the power conversion circuit 120 to the power transmission coil L1 of the power transmission side resonance circuit 130.
- the induced AC power is excited in a receiving coil L2 (described later) of the power receiving side resonance circuit 210 by the near magnetic field effect. That is, the wireless power receiving apparatus 200 receives the power from the wireless power transmitting apparatus 100 wirelessly.
- the power reception side resonance circuit 210 includes a power reception coil L2 and power reception side resonance capacitors C20 and C21.
- the power receiving coil L2 is formed using a litz wire or a single wire obtained by twisting a plurality of thin conductor wires. Examples of the power receiving coil L2 include a planar coil and a solenoid coil.
- the power receiving coil L2 forms an LC resonance circuit together with the power receiving side resonance capacitors C20 and C21.
- the power receiving side resonance capacitors C20 and C21 are formed by connecting a plurality of capacitors in series and parallel, and have a function of adjusting the resonance frequency of the LC resonance circuit.
- the power receiving side resonance capacitor C20 is connected in series with one end of the power receiving coil L2, and the power receiving side resonance capacitor C21 is connected in series with the other end of the power receiving coil L2.
- Examples of the capacitors used as the power receiving side resonance capacitors C20 and C21 include ceramic capacitors.
- the power receiving side resonance capacitors C20 and C21 are connected in series to the power receiving coil L2.
- the present invention is not limited to this.
- only the power receiving side resonance capacitor C20 is connected to the power receiving coil L2. May be connected in series, and only the power reception side resonance capacitor C20 may be connected in parallel to the power reception coil L2, or the power reception side resonance capacitor C20 may be connected in series to the power reception coil L2.
- the capacitor C21 may be connected in parallel.
- the power receiving coil L2 of the power receiving side resonance circuit 210 configured as described above receives the AC power from the wireless power transmitting apparatus 100 wirelessly.
- the rectifier circuit 220 rectifies the power received by the power receiving coil L2 of the power receiving resonance circuit 210 and outputs the rectified power to the load RL.
- the rectifier circuit 220 includes a bridge type circuit in which four diodes (rectifier elements) D1 to D4 are connected in a full bridge, and a smoothing capacitor C2 connected in parallel to the bridge type circuit. . That is, the rectifier circuit 220 has a function of full-wave rectifying the AC power supplied from the power receiving side resonance circuit 210.
- one output terminal of the power reception side resonance circuit 210 is connected to the midpoint of the anode of the diode D1 and the cathode of the diode D2, and the power reception side resonance circuit 210 is connected to the midpoint of the anode of the diode D3 and the cathode of the diode D4.
- the smoothing capacitor C2 smoothes the rectified voltage and generates a DC voltage.
- the rectifier circuit 220 uses a full-wave rectifier circuit, but is not limited to this, a half-wave rectifier circuit having a smoothing capacitor connected in parallel to one diode and the cathode of the diode, A center tap circuit having two diodes and a smoothing capacitor connected in parallel to the respective cathodes of the two diodes may be configured.
- the rectifier circuit 220 is composed of a full-wave rectifier circuit, the utilization efficiency of the power source can be increased.
- the power receiving side voltage detector 230 detects the output voltage of the rectifier circuit 220. More specifically, the output voltage of the rectifier circuit 220 is converted into a low voltage signal using a technique such as voltage division and amplification, and the output voltage is detected using this signal.
- the power receiving side voltage detection unit 230 compares the preset reference voltage value with the detected output voltage, and when the output voltage exceeds the reference voltage value, transmits the output signal SG5 to the control circuit 250 described later.
- the short circuit 240 has a function of short-circuiting both ends of the power receiving coil L2 when the output voltage of the rectifier circuit 220 detected by the power receiving side voltage detecting unit 230 exceeds a preset reference voltage value. Specifically, the short circuit 240 has a function of short-circuiting the diode D2 and the diode D4. The short circuit 240 is short-circuited based on the drive signal SG6 transmitted from the control circuit 250.
- the short circuit 240 includes switching elements SW5 and SW6 and rectifying elements D5 and D6.
- the switching elements SW5 and SW6 are connected between the output unit of the power receiving resonance circuit 210 and the output unit of the rectifier circuit 220. More specifically, the switching element SW5 is connected in parallel to the diode D4, and the switching element SW6 is connected in parallel to the diode D2.
- the switching elements SW5 and SW6 have a function of turning on / off in response to a drive signal SG6 from a control circuit 250 described later. That is, when the switching elements SW5 and SW6 are turned on, the diodes D2 and D4 are short-circuited and no voltage is generated in the rectifier circuit 220.
- the rectifier circuit 220 functions as a full-wave rectifier circuit in which four diodes D1 to D4 are connected in a full bridge.
- MOS-FETs are used as the switching elements SW5 and SW6.
- the present invention is not limited to this, and elements such as IGBTs may be used.
- the rectifying elements D5 and D6 are inserted between the output part of the power receiving side resonance circuit 210 and the switching elements SW5 and SW6.
- Examples of the rectifying elements D5 and D6 include diodes.
- the rectifying element D5 is connected in series with the switching element SW5
- the anode is connected to the input part of the bridge-type circuit, that is, the cathode of the diode D4, and the cathode is connected to the drain of the switching element SW5.
- the rectifying element D6 is connected in series with the switching element SW6, the anode is connected to the input part of the bridge circuit, that is, the cathode of the diode D2, and the cathode is connected to the drain of the switching element SW6.
- the control circuit 250 controls the operation of the short circuit 240. Specifically, when the output signal SG5 is received from the power receiving side voltage detection unit 230, the drive signal SG6 is supplied to the switching elements SW5 and SW6, and the switching elements SW5 and SW6 are turned on.
- FIG. 2 is a circuit configuration diagram showing a conventional wireless power transmission apparatus together with a load.
- FIG. 3 is a partially enlarged view of a circuit configuration diagram showing a current path by a closed loop of the power receiving side resonance circuit and the short circuit when the switching element of the short circuit in FIG. 2 is OFF.
- FIG. 4 is a partially enlarged view of a circuit configuration diagram showing a current path by a closed loop of the power receiving side resonance circuit and the short circuit when the switching element of the short circuit in FIG. 1 is OFF.
- the switching elements SW5, SW6, SW11, and SW12 are equivalent models based on the parallel connection of the parasitic capacitance of the switching element and the switch.
- the conventional wireless transmission device S ⁇ b> 2 includes a wireless power transmission device 300 and a wireless power reception device 400.
- the wireless power transmitting apparatus 300 supplies a DC power to the power conversion circuit 320, a power conversion unit 321 that bridge-connects four switching elements SW7 to SW10, and SW control signals SG7 to SG10 to supply the switching element SW7.
- a switch drive unit 322 that controls the on / off operation of SW10, and includes a power conversion circuit 320 that converts DC power into AC power, a power transmission coil L3, and power transmission side resonance capacitors C30 and C31. Power transmission side resonance circuit 330 for wirelessly transmitting AC power from the.
- the wireless power receiving apparatus 400 includes a power receiving coil L4 and power receiving side resonance capacitors C40 and C41.
- the power receiving side resonant circuit 410 receives the AC power wirelessly transmitted from the wireless power transmitting apparatus 300 through the power receiving coil L4, and 4 A rectifier circuit 420 that rectifies received AC power, and a rectifier circuit 420 that includes a bridge type circuit in which two diodes D7 to D10 are connected in a full bridge and a smoothing capacitor C4 connected in parallel to the bridge type circuit;
- the power receiving side voltage detecting unit 430 that detects the voltage value, the short circuit 440 that short-circuits both ends of the power receiving side resonance circuit 410, and the control circuit 450 that controls the operation of the short circuit 440.
- the short circuit 440 includes a switching element SW12 connected to the cathode of the diode D8 of the rectifier circuit 420 and a switching element SW11 connected to the cathode of the diode D10, and the control circuit 450 outputs an output signal from the power receiving side voltage detection unit 430.
- the drive signal SG14 is supplied to the switching elements SW11 and SW12, and the switching elements SW11 and SW12 are turned on.
- the currents I L and I N flowing from the power receiving side resonance circuit 210 are caused by the diodes D ⁇ b> 5 and D ⁇ b> 6 of the short circuit 240.
- the path to the switching elements SW5 and SW6 is cut off, and the parasitic capacitance is not discharged. This is equivalent to an open circuit, so that the currents I L and I N do not flow to the switching elements SW5 and SW6. For this reason, generation
- the resonance frequency shifts due to the parasitic capacitance during normal operation, but in this embodiment, the power receiving side resonance circuit via the parasitic capacitance by the rectifying elements D5 and D6. Since the current path to 210 is cut off, the influence of the parasitic capacitances of the switching elements SW5 and SW6 on the resonance frequency of the power receiving side resonance circuit 210 can be suppressed.
- FIG. 5A is a diagram illustrating a path of a current flowing through the rectifier circuit and the short circuit when the switching element of the short circuit in FIG. 1 is in an OFF state.
- FIG. 5b is a diagram illustrating a path of a current flowing through the rectifier circuit and the short circuit when the switching element of the short circuit in FIG. 1 is in an on state.
- one of the AC current paths flowing through the rectifier circuit 220 is a path that returns from the receiving coil L2 via the diode D1, the smoothing capacitor C2, the load RL, and the diode D4.
- the other current path is a path for returning from the power receiving coil L2 via the diode D3, the smoothing capacitor C2, the load RL, and the diode D2.
- one of the current paths of the alternating current flowing through the rectifier circuit 220 is a path that returns from the power receiving coil L2 via the diode D5, the switching element SW5, and the diode D2, and the other current path is the power receiving power.
- This is a path for returning from the coil L2 via the diode D6, the switching element SW6, and the diode D4.
- the circuit elements in the subsequent stage from the rectifier circuit 220 can be protected from abnormality.
- FIG. 6 is a flowchart illustrating a protection operation of the wireless power transmission device according to the first embodiment of the present invention.
- the power reception side voltage detection unit 230 constantly detects the value of the output voltage of the rectifier circuit 220. Is done. (Step S101)
- the power receiving side voltage detection unit 230 compares the value of the output voltage detected in step S101 with a preset reference voltage value. (Step S102)
- Step S101 As a result of comparing the output voltage value detected in step S101 with a preset reference voltage value, if the output voltage value detected in step S101 exceeds the preset reference voltage value (step S102Y), the power receiving side An output signal SG5 is output from the voltage detector 230 to the control circuit 250. (Step S103) On the other hand, as a result of comparing the output voltage value detected in Step S101 with a preset reference voltage value, the output voltage value detected in Step S101 does not exceed the preset reference voltage value ( Step S102N), returning to Step S101, the operations from Step S101 to Step S102 are repeatedly executed.
- Step S104 when receiving the output signal SG5, the control circuit 250 supplies the drive signal SG6 to the switching elements SW5 and SW6 and controls the switching elements SW5 and SW6 to be turned on.
- Step S105 Since the diodes D2 and D4 of the rectifier circuit 220 are short-circuited by the switching elements SW5 and SW6, the current path from the power reception side resonance circuit 210 is changed from the diode D5 to the power reception side resonance via the switching element SW5 and the diode D2. There are two paths: a path returning to the circuit 210 and a path returning from the diode D6 to the power receiving side resonance circuit 210 via the switching element SW6 and the diode D4. At this time, since no current flows to the output side of the rectifier circuit 220, circuit elements in the subsequent stage from the rectifier circuit 220 can be protected from abnormality.
- the switching element SW5 of the short circuit 240 , SW6 is operated. Therefore, the diodes D2 and D4 of the rectifier circuit 220 are short-circuited. As a result, the generated overvoltage is not output to the subsequent stage from the power reception side resonance circuit 210, and the circuit elements subsequent to the power reception side resonance circuit 210 can be protected.
- the rectifier elements D5 and D6 inserted between the output portion of the power receiving side resonance circuit 210 and the switching elements SW5 and SW6 are provided, the current path to the parasitic capacitance of the switching elements SW5 and SW6 is blocked. At the same time, the discharge of the parasitic capacitance is suppressed. Thereby, generation
- FIG. 7 is a circuit configuration diagram showing the wireless power transmission device according to the second embodiment of the present invention together with a load.
- the wireless power transmission device S3 includes the wireless power transmission device 100 and the wireless power reception device 200, similarly to the wireless power transmission device S1 according to the first embodiment.
- the wireless power transmission device 100 includes a power source 110, a power conversion circuit 120, and a power transmission side resonance circuit 130.
- the wireless power reception device 200 includes a power reception side resonance circuit 210, a rectifier circuit 220, and a power reception side voltage detection unit. 230, a short circuit 540, and a control circuit 250.
- the configuration of the power source 110, the power conversion circuit 120, the power transmission side resonance circuit 130, the power reception side resonance circuit 210, the rectifier circuit 220, the power reception side voltage detection unit 230, and the control circuit 250 is the same as that of the wireless power transmission device S1 according to the first embodiment. It is the same.
- This embodiment is different from the first embodiment in that a short circuit 540 is provided instead of the short circuit 240 of the wireless power transmission device S1 according to the first embodiment.
- a description will be given focusing on
- the short circuit 540 has a function of short-circuiting both ends of the power receiving coil L2 when the output voltage of the rectifier circuit 220 detected by the power receiving side voltage detection unit 230 exceeds a preset reference voltage value.
- the short circuit 540 has a function of short-circuiting the diode D2 and the diode D4.
- the short circuit 540 is short-circuited based on the drive signal SG6 transmitted from the control circuit 250.
- the short circuit 540 includes rectifying elements D5 and D6 and a switching element SW13.
- the configurations of the rectifying elements D5 and D6 are the same as those of the wireless power transmission device S1 according to the first embodiment.
- the switching element SW13 is connected between the output part of the power reception side resonance circuit 210 and the output part of the rectifier circuit 220. Specifically, the switching element SW13 is connected to the cathodes of the rectifying elements D5 and D6, respectively. In the present embodiment, the switching element SW13 is composed of a MOS-FET. Therefore, the cathode of the rectifying element D5 and the cathode of D6 are connected in parallel to the drain of the switching element SW13.
- the switching element SW13 has a function of turning on / off in response to the drive signal SG6 from the control circuit 250. That is, when the switching element SW13 is turned on, the diodes D2 and D4 are short-circuited and no voltage is generated in the rectifier circuit 220.
- the rectifier circuit 220 functions as a full-wave rectifier circuit in which four diodes D1 to D4 are connected in a full bridge.
- the MOS-FET is used as the switching element SW13.
- the present invention is not limited to this, and an element such as an IGBT may be used.
- FIG. 8a is a diagram illustrating a path of a current flowing through the rectifier circuit and the short circuit when the switching element of the short circuit in FIG. 7 is in an OFF state.
- FIG. 8b is a diagram illustrating a path of a current flowing through the rectifier circuit and the short circuit when the switching element of the short circuit in FIG. 7 is in an on state.
- one of the current paths of the alternating current flowing through the rectifier circuit 220 is a path that returns from the receiving coil L2 via the diode D1, the smoothing capacitor C2, the load RL, and the diode D4.
- the other current path is a path for returning from the power receiving coil L2 via the diode D3, the smoothing capacitor C2, the load RL, and the diode D2.
- the feedback of current to the input portion of the rectifier circuit 220 is blocked by the diodes D5 and D6.
- the parasitic capacitance of the switching element SW13 can be regarded as equivalent to insulation, so that the parasitic capacitance of the switching element SW13 is discharged. Is not performed, and there is no current path flowing through the switching element SW13. That is, there is no current path flowing from the input portion of the rectifier circuit 220 to the short circuit 540.
- one of the AC current paths flowing through the rectifier circuit 220 is a path that returns from the power-receiving-side resonance circuit 210 via the diode D5, the switching element SW13, and the diode D2.
- the other current path is a path that returns from the power receiving side resonance circuit 210 via the diode D6, the switching element SW13, and the diode D4.
- the circuit elements in the subsequent stage from the rectifier circuit 220 can be protected from abnormality.
- the switching element SW13 of the short circuit 540 is changed. Make it work. Therefore, both ends of the power receiving coil L2 of the power receiving side resonance circuit 210 are short-circuited. As a result, the generated overvoltage is not output to the subsequent stage from the power reception side resonance circuit 210, and the circuit elements subsequent to the power reception side resonance circuit 210 can be protected.
- the wireless power transmission device S3 since the number of switching elements constituting the short circuit 540 is one, space saving and simplification of the device can be achieved.
- FIG. 9 is a circuit configuration diagram showing the wireless power transmission device according to the third embodiment of the present invention together with a load.
- the wireless power transmission device S4 includes the wireless power transmission device 100 and the wireless power reception device 200, similarly to the wireless power transmission device S1 according to the first embodiment.
- the wireless power transmission device 100 includes a power source 110, a power conversion circuit 120, and a power transmission side resonance circuit 130.
- the wireless power reception device 200 includes a power reception side resonance circuit 210, a rectifier circuit 220, and a power reception side voltage detection unit. 230, a short circuit 240, and a control circuit 250.
- the configuration of the power source 110, the power conversion circuit 120, the power transmission side resonance circuit 130, the power reception side resonance circuit 210, the rectifier circuit 220, the power reception side voltage detection unit 230, and the control circuit 250 is the same as that of the wireless power transmission device S1 according to the first embodiment.
- a power conversion circuit 620 is provided instead of the power conversion circuit 120 of the wireless power transmission device S1 according to the first embodiment, and the control circuit 250 of the wireless power transmission device S1 according to the first embodiment. Instead, the control circuit 750 is provided. This is different from the first embodiment. Hereinafter, a description will be given focusing on differences from the first embodiment.
- the power conversion circuit 620 includes a power conversion unit 121, a switch drive unit 122, and a power control unit 123.
- the configurations of the power conversion unit 121 and the switch driving unit 122 are the same as those of the wireless power transmission device S1 according to the first embodiment.
- the power control unit 123 has a function of stopping the function of the power conversion circuit 620 and stopping the power transmission operation of the wireless power transmission apparatus 100. Specifically, when a stop signal SG15 supplied from the control circuit 750 of the wireless power receiving apparatus 200 described later is received, the operation of the power conversion unit 121 is stopped.
- the switch drive unit 122 and the power control unit 123 are configured separately, but either one of them may have both functions.
- the control circuit 750 controls the operation of the short circuit 240 similarly to the control circuit 250.
- the power control unit 123 is controlled. Specifically, when the output signal SG5 is received from the power receiving side voltage detection unit 230, the drive signal SG6 is supplied to the switching elements SW5 and SW6, and the switching elements SW5 and SW6 are turned on. A stop signal SG15 is transmitted to the power control unit 123 at the same time or immediately after the drive signal SG6 is supplied to SW5 and SW6, and the power transmission operation of the wireless power transmitting apparatus 100 is controlled to stop.
- FIG. 10 is a flowchart illustrating a protection operation of the wireless power transmission device according to the third embodiment of the present invention.
- step S101 to step S105 is the same as that of the first embodiment, and the description is omitted here.
- the control circuit 750 transmits a stop signal SG15 to the power control unit 123 of the wireless power transmitting apparatus 100 simultaneously or immediately after the switching elements SW5 and SW6 are turned on. (Step S106)
- Step S107 the power control unit 123 stops the operation of the power conversion circuit 620 and stops the power transmission operation of the wireless power transmitting apparatus 100.
- the switching element SW5 of the short circuit 240 , SW6 is operated. Therefore, the diodes D2 and D4 of the rectifier circuit 220 are short-circuited. As a result, the generated overvoltage is not output to the subsequent stage from the power reception side resonance circuit 210, and the circuit elements subsequent to the power reception side resonance circuit 210 can be protected.
- the rectifier elements D5 and D6 inserted between the output portion of the power receiving side resonance circuit 210 and the switching elements SW5 and SW6 are provided, the current path to the parasitic capacitance of the switching elements SW5 and SW6 is blocked. At the same time, the discharge of the parasitic capacitance is suppressed. Thereby, generation
- a stop signal SG15 for stopping the power transmission operation is transmitted to the wireless power transmission device 100 at the same time or immediately after the control circuit 750 operates the switching elements SW5 and SW6. It is configured. Therefore, when the value of the output voltage detected by the power receiving side voltage detection unit 230 exceeds the preset reference voltage value, the operation of the wireless power transmitting apparatus 100 stops. Therefore, the circuit elements of the entire wireless power transmission device S4 can be protected. Moreover, since the electric current application time to the short circuit 240 is suppressed when the operation
- FIG. 11 is a circuit block diagram which shows the wireless power receiving apparatus in the wireless power transmission apparatus which concerns on 4th Embodiment of this invention with load.
- the wireless power transmission device includes a wireless power transmission device 100 and a wireless power reception device 200, similarly to the wireless power transmission device S1 according to the first embodiment.
- the wireless power transmission device 100 in the wireless power transmission device according to the fourth embodiment is the same as the wireless power transmission device 100 in the wireless power transmission device S1 according to the first embodiment, and a description thereof will be omitted.
- the wireless power receiving device 200 in the wireless power transmission device according to the fourth embodiment includes a power receiving side resonance circuit 210, a transformer circuit 260, a rectifier circuit 220, a power receiving side voltage detection unit 230, a short circuit 240, and a control circuit 250. And having.
- the configurations of the power reception side resonance circuit 210, the rectification circuit 220, the power reception side voltage detection unit 230, the short circuit 240, and the control circuit 250 are the same as those of the wireless power transmission device S1 according to the first embodiment.
- This embodiment is different from the first embodiment in that the wireless power receiving apparatus 200 includes a transformer circuit 260.
- a description will be given focusing on differences from the first embodiment.
- the transformer circuit 260 is inserted between the output part of the power reception side resonance circuit 210 and the input part of the rectifier circuit 220.
- the transformer circuit 260 transforms the voltage output from the power receiving resonance circuit 210 to a desired value and outputs the voltage to the rectifier circuit 220.
- the transformer circuit 260 is a transformer having a primary winding Lp and a secondary winding Ls.
- the primary winding Ls and the secondary winding Lp are formed using a litz wire or a single wire obtained by twisting a plurality of thin conductor strands.
- the primary winding Lp and the secondary winding Ls are magnetically coupled, and the voltage applied to the primary winding Lp by the turn ratio of the primary winding Lp and the secondary winding Ls is 2
- the voltage applied to the next winding Ls can be changed. That is, the transformer circuit 260 has a function of changing the voltage output from the power receiving resonance circuit 210 to a voltage corresponding to the turn ratio of the primary winding Lp and the secondary winding Ls and outputting the voltage to the rectifier circuit 220.
- one output end of the power receiving side resonance circuit 210 is connected to one end of the primary winding Lp, and one output end of the power receiving side resonance circuit 210 is connected to the other end of the primary winding Lp.
- one end of the secondary winding Ls is connected to the midpoint of the anode of the diode D1 and the cathode of the diode D2, and the other end of the secondary winding Ls is connected to the midpoint of the anode of the diode D3 and the cathode of the diode D4. Is done.
- a transformer circuit 260 is inserted between the output part of the power reception side resonance circuit 210 and the input part of the rectifier circuit 220. Therefore, when the switching elements SW5 and SW6 of the short circuit 240 are in the OFF state, one of the AC current paths flowing through the rectifier circuit 220 is from the power receiving coil L2 to the transformer circuit 260, the diode D1, the smoothing capacitor C2, and the like.
- the path is a return path via the load RL, the diode D4, and the transformer circuit 260, and the other current path is from the power receiving coil L2 via the transformer circuit 260, the diode D3, the smoothing capacitor C2, the load RL, the diode D2, and the transformer circuit 260. And become a return route.
- one of the AC current paths flowing through the rectifier circuit 220 is from the power receiving coil L2 to the transformer circuit 260, the diode D5, the switching element SW5, The diode D2 and a path for feedback via the transformer circuit 260 are provided, and the other current path is a path for feedback from the power receiving coil L2 via the transformer circuit 260, the diode D6, the switching element SW6, the diode D4, and the transformer circuit 260. .
- the wireless power transmission device further includes the transformer circuit 260 between the output unit of the power reception side resonance circuit 210 and the input unit of the rectifier circuit 220. For this reason, it is possible to output a desired voltage / current from one power-receiving-side resonance circuit 210 by changing the transformation ratio of the transformer circuit 260 during normal operation while protecting the circuit elements when an overvoltage occurs.
- FIG. 12 is a circuit block diagram which shows the wireless power receiving apparatus with the load in the wireless power transmission apparatus which concerns on 5th Embodiment of this invention.
- the wireless power transmission device includes a wireless power transmission device 100 and a wireless power reception device 200, similarly to the wireless power transmission device according to the fourth embodiment. Since the wireless power transmission device 100 in the wireless power transmission device according to the fifth embodiment is similar to the wireless power transmission device 100 in the wireless power transmission device S1 according to the first embodiment, the description thereof is omitted as in the fourth embodiment.
- the wireless power receiving apparatus 200 in the wireless power transmission device according to the fourth embodiment includes a power receiving side resonance circuit 210, a transformer circuit 260, a rectifier circuit 220, a power receiving side voltage detection unit 230, a short circuit 640, and a control circuit 250. And having.
- the configurations of the power reception side resonance circuit 210, the transformer circuit 260, the rectification circuit 220, the power reception side voltage detection unit 230, and the control circuit 250 are the same as those of the wireless power transmission device according to the fourth embodiment.
- the present embodiment is different from the fourth embodiment in that the wireless power receiving apparatus 200 includes a short circuit 640 instead of the short circuit 240.
- a description will be given focusing on differences from the fourth embodiment.
- the short circuit 640 has a function of short-circuiting both ends of the power receiving coil L2 when the output voltage of the rectifier circuit 220 detected by the power receiving side voltage detecting unit 230 exceeds a preset reference voltage value. Specifically, the short circuit 640 has a function of short-circuiting between the power reception side resonance capacitor C20 and the power reception side resonance capacitor C21. The short circuit 640 is short-circuited based on the drive signal SG6 transmitted from the control circuit 250.
- the short circuit 240 includes switching elements SW14 and SW15 and rectifying elements D11 and D12.
- the switching elements SW14 and SW15 are connected between the output unit of the power reception side resonance circuit 210 and the output unit of the rectifier circuit 220. More specifically, the switching elements SW ⁇ b> 14 and SW ⁇ b> 15 are connected in parallel between the output unit of the power receiving side resonance circuit 210 and the input unit of the transformer circuit 260, respectively.
- the switching elements SW14 and SW15 have a function of turning on / off in response to the drive signal SG6 from the control circuit 250. That is, when the switching elements SW14 and SW15 are turned on, both ends of the output part of the power receiving resonance circuit 210 are short-circuited, and no voltage is generated in the rectifier circuit 220.
- the transformer circuit 260 transforms the voltage output from the power receiving resonance circuit 210 to a desired value and outputs the voltage to the rectifier circuit 220.
- the rectifier circuit 220 includes four diodes D1. ⁇ D4 functions as a full-wave rectifier circuit with a full bridge connection.
- MOS-FETs are used as the switching elements SW14 and SW15.
- the present invention is not limited to this, and elements such as IGBTs may be used.
- the rectifying elements D11 and D12 are inserted between the output part of the power reception side resonance circuit 210 and the switching elements SW14 and SW15.
- Examples of the rectifying elements D11 and D12 include diodes.
- the rectifying element D11 is connected in series with the switching element SW14, the anode is connected to the drain of the switching element SW14, and the cathode is connected to the output part of the power reception side resonance circuit 210, that is, the power reception side resonance capacitor C20. Has been.
- the rectifying element D12 is connected in series with the switching element SW15, the anode is connected to the output part of the power reception side resonance circuit 210, that is, the power reception side resonance capacitor C20, and the cathode is connected to the drain of the switching element SW15.
- a short circuit 640 is inserted in parallel between the output part of the power receiving side resonance circuit 210 and the input part of the transformer circuit 260. Therefore, when the switching elements SW14 and SW15 of the short circuit 640 are in the OFF state, one of the current paths of the alternating current flowing through the rectifier circuit 220 is from the power receiving coil L2 to the transformer circuit 260, the diode D1, the smoothing capacitor C2, and the like.
- the path is a return path via the load RL, the diode D4, and the transformer circuit 260, and the other current path is from the power receiving coil L2 via the transformer circuit 260, the diode D3, the smoothing capacitor C2, the load RL, the diode D2, and the transformer circuit 260.
- the switching elements SW14 and SW15 of the short circuit 640 are in the ON state, one of the AC current paths flowing through the rectifier circuit 220 is fed back from the power receiving coil L2 via the switching element SW14 and the diode D11.
- the other current path is a path that returns from the power receiving coil L2 via the diode D12 and the switching element SW15.
- the wireless power transmission device further includes the transformer circuit 260 between the output unit of the power reception side resonance circuit 210 and the input unit of the rectifier circuit 220. For this reason, it is possible to output a desired voltage / current from one power-receiving-side resonance circuit 210 by changing the transformation ratio of the transformer circuit 260 during normal operation while protecting the circuit elements when an overvoltage occurs. Further, in the wireless power transmission device according to the present embodiment, the short circuit 640 is inserted between the output unit of the power receiving resonance circuit 210 and the input unit of the transformer circuit 260. Circuit elements after the circuit 260 can be protected.
- FIG. 13 is a circuit block diagram which shows the wireless power receiving apparatus in the wireless power transmission apparatus which concerns on 6th Embodiment of this invention with load.
- the wireless power transmission device includes a wireless power transmission device 100 and a wireless power reception device 200, similarly to the wireless power transmission device S1 according to the first embodiment.
- the wireless power transmission device 100 in the wireless power transmission device according to the sixth embodiment is the same as the wireless power transmission device 100 in the wireless power transmission device S1 according to the first embodiment, and thus the description thereof is omitted.
- the wireless power receiving apparatus 200 in the wireless power transmission device according to the sixth embodiment includes a power receiving side resonance circuit 210, an inductor circuit 270, a rectifier circuit 220, a power receiving side voltage detection unit 230, a short circuit 240, and a control circuit 250. And having.
- the configurations of the power reception side resonance circuit 210, the rectification circuit 220, the power reception side voltage detection unit 230, the short circuit 240, and the control circuit 250 are the same as those of the wireless power transmission device S1 according to the first embodiment.
- This embodiment is different from the first embodiment in that the wireless power receiving apparatus 200 includes an inductor circuit 270.
- the wireless power receiving apparatus 200 includes an inductor circuit 270.
- the inductor circuit 270 is inserted between the output part of the power receiving side resonance circuit 210 and the input part of the rectifier circuit 220.
- the inductor circuit 270 includes inductors L5 and L6.
- the inductors L5 and L6 have a function as a large resistor for a frequency above a certain frequency and a function to remove common mode noise.
- the inductors L5 and L6 have a function of attenuating or blocking noise superimposed on the output from the power receiving resonance circuit 210 and outputting the noise to the rectifier circuit 220.
- one end of the inductor L5 is connected to one output end of the power receiving resonance circuit 210, and the other end of the inductor L5 is connected to the midpoint of the anode of the diode D3 and the cathode of the diode D4.
- one end of the inductor L6 is connected to the other output end of the power receiving side resonance circuit 210, and the other end of the inductor L6 is connected to the midpoint of the anode of the diode D1 and the cathode of the diode D2.
- the inductors L5 and L6 include a normal mode choke coil for suppressing normal mode noise and a common mode choke coil for suppressing common mode noise.
- an inductor circuit 270 is inserted between the output part of the power reception side resonance circuit 210 and the input part of the rectifier circuit 220. Therefore, when the switching elements SW5 and SW6 of the short circuit 240 are in the OFF state, one of the AC current paths flowing through the rectifier circuit 220 is from the power receiving coil L2, the inductor L6, the diode D1, the smoothing capacitor C2, and the like. A feedback path is provided via the load RL, the diode D4, and the inductor L5, and the other current path is returned from the power receiving coil L2 via the inductor L5, the diode D3, the smoothing capacitor C2, and the load RL, the diode D2, and the inductor L6. It becomes a route.
- one of the AC current paths flowing through the rectifier circuit 220 is from the receiving coil L2 to the inductor L5, the diode D5, the switching element SW5, and the diode.
- D2 is a path that returns via the inductor L6, and the other current path is a path that returns from the power receiving coil L2 via the inductor L6, the diode D6, the switching element SW6, the diode D4, and the inductor L5.
- the wireless power transmission device further includes the inductor circuit 270 between the output unit of the power receiving resonance circuit 210 and the input unit of the rectifier circuit 220. Therefore, it is possible to suppress noise during normal operation while protecting circuit elements when an overvoltage occurs.
- the characteristic configuration and function of the wireless power transmission device according to the sixth embodiment described above may be applied to the wireless power transmission devices according to the fourth and fifth embodiments.
- S1 to S4 ... Wireless power transmission device 100 ... Wireless power transmission device, 110 ... Power source, 120, 620 ... Power conversion circuit, 121 ... Power conversion unit, 122 ... Switch drive unit, 123 ... Power control unit, 130 ... Power transmission side resonance Circuit: 200 ... Wireless power receiving device, 210 ... Power receiving side resonance circuit, 220 ... Rectifier circuit, 230 ... Power receiving side voltage detector, 240, 540, 640 ... Short circuit, 250,750 ... Control circuit, 260 ... Transformer circuit, 270 DESCRIPTION OF SYMBOLS ... Inductor circuit, 300 ... Wireless power transmission apparatus, 310 ... Power supply, 320 ... Power conversion circuit, 321 ... Power conversion part, 322 ...
- Switch drive part 330 ... Power transmission side resonance circuit, 400 ... Wireless power reception apparatus, 410 ... Power reception side resonance Circuit, 420 ... Rectifier circuit, 430 ... Receiving side voltage detector, 440 ... Short circuit, 450 ... Control circuit, SW1 SW15: switching element, C2, C4: smoothing capacitor, C10, C11, C30, C31 ... power transmission side resonance capacitor, C20, C21, C40, C41 ... power reception side resonance capacitor, L1, L3 ... power transmission coil, L2, L4 ... power reception Coil, Lp ... primary winding, Ls ... secondary winding, L5, L6 ... inductor, D1-D12 ... rectifier (diode), SG1-SG4, SG7-SG10 ... SW control signal, SG5, SG13 ... output signal SG6, SG14 ... drive signal, SG15 ... stop signal.
Abstract
Description
まず、図1を参照して、本発明の第1実施形態に係るワイヤレス電力伝送装置S1の構成について説明する。図1は、本発明の第1実施形態に係るワイヤレス電力伝送装置を負荷と共に示す回路構成図である。
次に、図7を参照して、本発明の第2実施形態に係るワイヤレス電力伝送装置S3の構成について説明する。図7は、本発明の第2実施形態に係るワイヤレス電力伝送装置を負荷とともに示す回路構成図である。
次に、図9を参照して、本発明の第3実施形態に係るワイヤレス電力伝送装置S4の構成について説明する。図9は、本発明の第3実施形態に係るワイヤレス電力伝送装置を負荷とともに示す回路構成図である。
次に、図11を参照して、本発明の第4実施形態に係るワイヤレス電力伝送装置の構成について説明する。図11は、本発明の第4実施形態に係るワイヤレス電力伝送装置におけるワイヤレス受電装置を負荷とともに示す回路構成図である。
次に、図12を参照して、本発明の第5実施形態に係るワイヤレス電力伝送装置の構成について説明する。図12は、本発明の第5実施形態に係るワイヤレス電力伝送装置におけるワイヤレス受電装置を負荷とともに示す回路構成図である。
次に、図13を参照して、本発明の第6実施形態に係るワイヤレス電力伝送装置の構成について説明する。図13は、本発明の第6実施形態に係るワイヤレス電力伝送装置におけるワイヤレス受電装置を負荷とともに示す回路構成図である。
Claims (6)
- ワイヤレス送電装置からワイヤレスにて電力を受電するワイヤレス受電装置であって、
送電側からの電力をワイヤレスに受電する受電コイルと、前記受電コイルに接続される受電側共振コンデンサと、を有する受電側共振回路と、
前記受電コイルが受電した電力を整流して負荷に出力する整流回路と、
前記整流回路の出力電圧を検知する受電側電圧検知部と、
前記受電側共振回路の出力部と前記整流回路の出力部との間に接続されるスイッチング素子と、前記受電側共振回路の出力部と前記スイッチング素子との間に挿入される整流素子と、を有する短絡回路と、
前記受電側電圧検知部が検知した出力電圧の値があらかじめ設定された基準電圧値を超えたとき、前記スイッチング素子を動作させる制御回路と、を備えることを特徴とするワイヤレス受電装置。 - 前記整流回路は、4つのダイオードがフルブリッジ接続されたブリッジ型回路と、前記ブリッジ型回路が並列に接続された平滑コンデンサと、を有する請求項1に記載のワイヤレス受電装置。
- 前記制御回路は、前記スイッチング素子を動作させるのと同時または直後に送電動作を停止させる停止信号をワイヤレス送電装置に送信することを特徴とする請求項1または2に記載のワイヤレス受電装置。
- 前記受電側共振回路の出力部と前記整流回路の入力部との間に挿入される変圧回路をさらに備えることを特徴とする請求項1~3のいずれか一項に記載のワイヤレス受電装置。
- 前記受電側共振回路の出力部と前記整流回路の入力部との間に挿入されるインダクタ回路をさらに備えることを特徴とする請求項1~4のいずれか一項に記載のワイヤレス受電装置。
- 請求項1~5のいずれか一項に記載のワイヤレス受電装置と、ワイヤレス送電装置を備え、前記ワイヤレス送電装置は、受電側に電力をワイヤレスにて送電する送電コイルと、前記送電コイルに接続される送電側共振コンデンサとで構成される送電側共振回路と、入力直流電力を交流電力に変換して前記送電コイルに供給する電力変換回路と、を有することを特徴とするワイヤレス電力伝送装置。
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JP2017510111A JP6361818B2 (ja) | 2015-03-31 | 2016-03-30 | ワイヤレス受電装置及びワイヤレス電力伝送装置 |
CN201680020194.9A CN107431382B (zh) | 2015-03-31 | 2016-03-30 | 无线受电装置和无线电力传输装置 |
US15/559,173 US10298069B2 (en) | 2015-03-31 | 2016-03-30 | Wireless power receiving device and wireless power transmission device |
DE112016001489.9T DE112016001489T5 (de) | 2015-03-31 | 2016-03-30 | Drahtlos-energieempfangsvorrichtung und drahtlosenergieübertragungsvorrichtung |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2017169274A (ja) * | 2016-03-14 | 2017-09-21 | 株式会社東芝 | 受電装置および無線電力伝送システム |
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Also Published As
Publication number | Publication date |
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DE112016001489T5 (de) | 2018-01-04 |
CN107431382A (zh) | 2017-12-01 |
JPWO2016159093A1 (ja) | 2017-12-28 |
US10298069B2 (en) | 2019-05-21 |
CN107431382B (zh) | 2020-06-05 |
US20180090995A1 (en) | 2018-03-29 |
JP6361818B2 (ja) | 2018-07-25 |
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