WO2013124977A1 - 非接触送電装置、非接触受電装置、および非接触送受電システム - Google Patents
非接触送電装置、非接触受電装置、および非接触送受電システム Download PDFInfo
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- WO2013124977A1 WO2013124977A1 PCT/JP2012/054221 JP2012054221W WO2013124977A1 WO 2013124977 A1 WO2013124977 A1 WO 2013124977A1 JP 2012054221 W JP2012054221 W JP 2012054221W WO 2013124977 A1 WO2013124977 A1 WO 2013124977A1
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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
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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
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- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
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- Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
Definitions
- This invention relates to a non-contact power transmission device, a non-contact power reception device, and a non-contact power transmission / reception system.
- Patent Document 1 discloses a coil unit in which a coil is wound around a plurality of divided flat magnetic cores in a non-contact power feeding apparatus.
- JP 2010-172084 A International Publication No. 2011/016736 Pamphlet US Patent Application Publication No. 2010/259110 JP 2000-269059 A
- JP 2010-172084 A In addition to the coil unit disclosed in JP 2010-172084 A, a plurality of types of coil units have been studied for use in non-contact power feeding.
- the magnetic flux distribution generated in the coil unit or the magnetic flux distribution suitable for the coil unit to receive power varies depending on the shape of the coil, the winding method, the shape of the magnetic core, and the like. If the magnetic flux distributions of the pair of power transmission unit and power reception unit are different, efficient power transmission / reception cannot be performed.
- the object of the present invention is to perform the transmission / reception between the power transmission unit and the power reception unit without actually performing power transmission / reception between the power transmission unit and the power reception unit, or confirming whether the coil unit is a compatible coil unit near the power transmission unit.
- Another object of the present invention is to provide a non-contact power transmission device, a non-contact power reception device, and a non-contact power transmission / reception system that can support a plurality of systems.
- the present invention is a contactless power transmission device capable of transmitting power to a power receiving device in a contactless manner, wherein the power transmission unit is configured to be able to transmit power to the power receiving device in a contactless manner, and the magnetic flux of the power transmission unit during power transmission And a communication unit that transmits information about the distribution to the power receiving device.
- the information is used to determine whether the power receiving device receives power from the non-contact power transmitting device.
- the communication unit transmits information before the power transmission unit starts power transmission to the power receiving device.
- the information includes information on a structure of a part constituting the power transmission unit that affects a magnetic flux distribution generated in the power transmission unit during power transmission or a parameter of the power transmission unit.
- the present invention is a power transmission device capable of contactlessly transmitting power to a power receiving device, the power transmission unit configured to be able to transmit power to the power receiving device in a contactless manner, and the magnetic flux distribution of the power transmission unit during power transmission And an adjusting device capable of adjusting.
- the power transmission device further includes a control unit that controls the adjustment device based on information about the power receiving device so that the magnetic flux distribution of the power transmission unit during power transmission is a magnetic flux distribution that matches the power receiving device.
- the present invention provides a contactless power receiving device capable of receiving power from a power transmitting device in a contactless manner, wherein the power receiving unit is configured to receive power from the power transmitting device in a contactless manner, and a power receiving unit during power receiving And a communication unit that transmits information regarding the magnetic flux distribution to the power transmission device.
- the information is used to determine whether or not the power transmission device transmits power to the non-contact power reception device.
- the communication unit transmits information before the power reception unit starts to receive power from the power transmission device.
- the information includes information on a structure of a part constituting the power receiving unit or a parameter of the power receiving unit that affects a magnetic flux distribution to be generated in the power receiving unit during power reception.
- the present invention provides a contactless power receiving device capable of receiving power from a power transmitting device in a contactless manner, wherein the power receiving unit is configured to receive power from the power transmitting device in a contactless manner, and a power receiving unit during power receiving And an adjusting device capable of adjusting the magnetic flux distribution suitable for the above.
- the non-contact power receiving apparatus further includes a control unit that controls the adjustment device based on information on the power transmission device so that the magnetic flux distribution suitable for the power receiving unit at the time of power reception becomes a magnetic flux distribution suitable for the power transmission device.
- the present invention is a non-contact power transmission / reception system including a power reception device and a power transmission device capable of transmitting power to the power reception device in a contactless manner.
- the power transmission device includes a power transmission unit configured to be able to transmit power to the power reception device in a contactless manner, and a communication unit that transmits information regarding the magnetic flux distribution of the power transmission unit during power transmission to the power reception device.
- the present invention is a non-contact power transmission and charging system including a power transmission device and a power reception device capable of receiving power from the power transmission device in a contactless manner.
- the power receiving device includes a power receiving unit configured to be able to receive power from the power transmitting device in a non-contact manner, and a communication unit that transmits information on the magnetic flux distribution of the power receiving unit during power reception to the power transmitting device.
- the power transmission unit and the power reception unit can be communicated with each other without actually performing power transmission / reception between the power transmission unit and the power reception unit or confirming whether the corresponding coil unit is near the power transmission unit. It is possible to determine the suitability of the correspondence.
- Another effect of the present invention is that the possibility of performing power transmission / reception is increased by adopting a configuration that can handle a plurality of systems.
- FIG. 10 It is the figure which showed the relationship between the distance from an electric current source or a magnetic current source, and the intensity
- FIG. 10 It is a circuit diagram which shows the detailed structure of the power transmission / reception system 10 shown in FIG. It is the figure which showed the modification of the power transmission unit and the power receiving unit.
- FIG. 6 is a diagram for explaining the operation of the non-contact power transmission and reception system according to Embodiment 1.
- FIG. 4 is a flowchart for illustrating control executed by the vehicle and the power transmission device in the first embodiment.
- 6 is a diagram for explaining an operation of a non-contact power transmission / reception system according to a modification of the first embodiment.
- FIG. 6 is a flowchart for illustrating control executed by a vehicle and a power transmission device in a modification of the first embodiment.
- FIG. 10 is a diagram for explaining the operation of the non-contact power transmission and reception system according to the second embodiment.
- FIG. 22 is a sectional view taken along the line XXII-XXII of FIG. 21 when operated in the operation mode C.
- FIG. 22 is a sectional view taken along the line XXII-XXII of FIG. 21 when operating in the operation mode P.
- It is a circuit diagram which shows the 1st structural example which switches the connection of the coil 221-1 and the coil 221-2.
- It is a circuit diagram which shows the 2nd structural example which switches the connection of the coil 221-1 and the coil 221-2.
- FIG. 6 It is a circuit diagram which shows the 3rd structural example which switches the connection of the coil 221-1 and the coil 221-2.
- 6 is a flowchart for illustrating control executed by a vehicle and a power transmission device in a second embodiment. It is the figure which showed the further modification of the coil shown in FIG. It is a figure for demonstrating operation
- FIG. It is a figure for demonstrating operation
- FIG. 1 is an overall block diagram illustrating an example of a non-contact power transmission / reception system.
- the vehicle 100 is exemplified by an electric vehicle using a rotating electrical machine as a drive source, but may be another vehicle as long as it receives power in a non-contact manner, and the power receiving target may not be a vehicle. .
- the non-contact power transmission system includes a power transmission device 200 and a vehicle 100.
- the power transmission device 200 includes a power supply unit 250, a power transmission unit 220, and a communication unit 230.
- Vehicle 100 includes a power receiving unit 110, a rectifier 180, a power storage device 190, and a power generation device 118.
- the power supply unit 250 receives power from the power supply 12 and generates high-frequency AC power.
- the power source 12 may be a commercial power source or an independent power source device.
- the power transmission unit 220 receives supply of high-frequency AC power from the power supply unit 250 and transmits power to the power reception unit 110 in a contactless manner.
- the power transmission unit 220 includes a resonance circuit including a coil and a capacitor.
- the power receiving unit 110 receives the power transmitted from the power transmitting unit 220 on the power transmitting device 200 side in a non-contact manner and outputs it to the rectifier 180.
- the power receiving unit 110 is also configured by a resonant circuit including a coil and a capacitor.
- the rectifier 180 converts the AC power received from the power receiving unit 110 into DC power, and outputs the converted DC power to the power storage device 190 to charge the power storage device 190.
- Power storage device 190 stores power output from rectifier 180 and also stores power generated by power generation device 118. Then, power storage device 190 supplies the stored power to power generation device 118. Note that a large-capacity capacitor can also be used as the power storage device 190.
- the power generation device 118 generates the driving force for driving the vehicle 100 using the electric power stored in the power storage device 190.
- power generation device 118 includes, for example, an inverter that receives electric power from power storage device 190, a motor driven by the inverter, a drive wheel driven by the motor, and the like.
- Power generation device 118 may include a generator for charging power storage device 190 and an engine capable of driving the generator.
- the natural frequency of the power transmission unit 220 of the power transmission device 200 is the same as the natural frequency of the power receiving unit 110 of the vehicle 100.
- the natural frequency of the power transmission unit 220 (power reception unit 110) means a vibration frequency when the electric circuit (resonance circuit) constituting the power transmission unit 220 (power reception unit 110) freely vibrates.
- the natural frequency when the braking force or the electrical resistance is zero is also referred to as the resonance frequency of the power transmission unit 220 (power reception unit 110).
- the case where the natural frequency is “same” includes not only the case where the natural frequency is completely the same but also the case where the natural frequency is substantially the same.
- the natural frequency is “substantially the same” means, for example, a case where the difference between the natural frequency of the power transmission unit 220 and the natural frequency of the power reception unit 110 is within 10% of the natural frequency of the power transmission unit 220 or the power reception unit 110. To do.
- the power transmission unit 220 is formed between the power transmission unit 220 and the power reception unit 110 and vibrates at a specific frequency, and is formed between the power transmission unit 220 and the power reception unit 110 and vibrates at a specific frequency. Power is transmitted to the power receiving unit 110 of the vehicle 100 in a non-contact manner through at least one of the electric fields.
- the coupling coefficient ⁇ between the power transmission unit 220 and the power receiving unit 110 is preferably 0.1 or less, and the product of the coupling coefficient ⁇ and the Q value indicating the resonance intensity is a predetermined value (for example, 1.0) or more.
- a power transmission unit 220 and a power reception unit 110 are designed.
- the power transmission unit 220 is transmitted from the power transmission unit 220 to the power reception unit 110 in a contactless manner by causing the power transmission unit 220 and the power reception unit 110 to resonate with each other by an electromagnetic field. Is done.
- Such coupling between the power transmission unit 220 and the power reception unit 110 in power transmission is, for example, “magnetic resonance coupling”, “magnetic field (magnetic field) resonance coupling”, “electromagnetic field (electromagnetic field) resonance coupling”, or “electric field ( Electric field) Resonant coupling ".
- the “electromagnetic field (electromagnetic field) resonance coupling” means a coupling including any of “magnetic resonance coupling”, “magnetic field (magnetic field) resonance coupling”, and “electric field (electric field) resonance coupling”.
- the power transmission unit 220 and the power reception unit 110 are formed by coils as described above, the power transmission unit 220 and the power reception unit 110 are mainly coupled by a magnetic field (magnetic field), and are referred to as “magnetic resonance coupling” or “magnetic field”. (Magnetic field) resonance coupling "is formed. It is also possible to employ antennas such as meander lines for power transmission unit 220 and power reception unit 110, respectively. In this case, the power transmission unit 220 and the power reception unit 110 are mainly coupled by an electric field (electric field) to form “electric field (electric field) resonance coupling”.
- an electric field electric field
- FIG. 2 is a schematic diagram for explaining the principle of power transmission by the resonance method.
- this resonance method in the same way as two tuning forks resonate, two LC resonance coils having the same natural frequency resonate in an electromagnetic field (near field), and thereby, from one coil. Electric power is transmitted to the other coil via an electromagnetic field.
- the primary coil 320 is connected to the high-frequency power source 310, and high-frequency power is supplied to the primary self-resonant coil 330 that is magnetically coupled to the primary coil 320 by electromagnetic induction.
- the primary self-resonant coil 330 is an LC resonator having an inductance and stray capacitance of the coil itself, and resonates with a secondary self-resonant coil 340 having the same resonance frequency as the primary self-resonant coil 330 via an electromagnetic field (near field). .
- energy electrical power moves from the primary self-resonant coil 330 to the secondary self-resonant coil 340 via the electromagnetic field.
- the energy (electric power) transferred to the secondary self-resonant coil 340 is taken out by the secondary coil 350 magnetically coupled to the secondary self-resonant coil 340 by electromagnetic induction and supplied to the load 360.
- power transmission by the resonance method is realized when the Q value indicating the resonance intensity between the primary self-resonant coil 330 and the secondary self-resonant coil 340 is greater than 100, for example.
- the coupling coefficient (kappa) between is preferably 0.1 or less.
- the coupling coefficient ( ⁇ ) is not limited to this value, and may take various values that improve power transmission.
- the coupling coefficient ( ⁇ ) between the power transmission unit and the power reception unit is close to 1.0.
- the secondary self-resonant coil 340 and the secondary coil 350 correspond to the power receiving unit 110 in FIG. 1
- the primary coil 320 and the primary self-resonant coil 330 correspond to the power transmission unit 220 in FIG. 1.
- FIG. 3 shows a simulation model of the power transmission system.
- the power transmission system 89 includes a power transmission unit 90 and a power reception unit 91, and the power transmission unit 90 includes an electromagnetic induction coil 92 and a power transmission unit 93.
- the power transmission unit 93 includes a resonance coil 94 and a capacitor 95 provided in the resonance coil 94.
- the power receiving unit 91 includes a power receiving unit 96 and an electromagnetic induction coil 97.
- the power receiving unit 96 includes a resonance coil 99 and a capacitor 98 connected to the resonance coil 99.
- the inductance of the resonance coil 94 is defined as an inductance Lt
- the capacitance of the capacitor 95 is defined as a capacitance C1.
- An inductance of the resonance coil 99 is an inductance Lr
- a capacitance of the capacitor 98 is a capacitance C2.
- FIG. 4 is a diagram illustrating the relationship between the deviation of the natural frequencies of the power transmission unit 93 and the power reception unit 96 and the power transmission efficiency.
- FIG. 4 shows a case where only the inductance Lt is changed while the inductance Lr and the capacitances C1 and C2 are fixed.
- the horizontal axis indicates the deviation (%) of the natural frequency
- the vertical axis indicates the transmission efficiency (%) at a constant frequency.
- the deviation (%) in the natural frequency is expressed by the following equation (3).
- the power transmission efficiency can be increased. Furthermore, the power transmission efficiency can be further improved by setting the natural frequency of each power transmission unit and the power receiving unit so that the absolute value of the deviation (%) of the natural frequency is 5% or less of the natural frequency of the power receiving unit 96. I understand that I can do it.
- simulation software electromagnetic field analysis software (JMAG (registered trademark): manufactured by JSOL Corporation) is employed.
- the “specific frequency magnetic field” typically has a relationship between the power transmission efficiency and the frequency of the current supplied to the resonance coil in the power transmission unit 220.
- the power transmission efficiency when power is transmitted from the resonance coil in the power transmission unit 220 to the resonance coil in the power reception unit 110 varies depending on various factors such as the distance between the resonance coil in the power transmission unit 220 and the resonance coil in the power reception unit 110. It depends on the factors.
- the natural frequency (resonance frequency) of the power transmission unit 220 and the power reception unit 110 is the natural frequency f0
- the frequency of the current supplied to the resonance coil in the power transmission unit 220 is the frequency f3
- the resonance coil and power transmission in the power reception unit 110 are transmitted.
- An air gap between the resonance coils in the unit 220 is defined as an air gap AG.
- FIG. 5 shows the relationship between the power transmission efficiency when the air gap AG is changed with the natural frequency f0 fixed, and the frequency f3 of the current supplied to the resonance coil in the power transmission unit 220 in FIG. It is a graph.
- the horizontal axis indicates the frequency f3 of the current supplied to the resonance coil in the power transmission unit 220
- the vertical axis indicates the power transmission efficiency (%).
- the efficiency curve L1 schematically shows the relationship between the power transmission efficiency when the air gap AG is small and the frequency f3 of the current supplied to the resonance coil in the power transmission unit 220. As shown in the efficiency curve L1, when the air gap AG is small, the peak of power transmission efficiency occurs at frequencies f4 and f5 (f4 ⁇ f5). When the air gap AG is increased, the two peaks when the power transmission efficiency is increased change so as to approach each other.
- the efficiency curve L2 when the air gap AG is larger than a predetermined distance, the peak of the power transmission efficiency is one, and the frequency of the current supplied to the resonance coil in the power transmission unit 220 is the frequency f6. Power transmission efficiency reaches its peak. When the air gap AG is further increased from the state of the efficiency curve L2, the peak of power transmission efficiency is reduced as shown by the efficiency curve L3.
- the following first method can be considered as a method for improving the power transmission efficiency.
- the power transmission unit 220 and the power reception unit are changed by changing the capacitance of the capacitor while keeping the frequency of the current supplied to the resonance coil in the power transmission unit 220 shown in FIG.
- a method of changing the characteristics of the power transmission efficiency with the network 110 is conceivable. Specifically, the capacitance of the capacitor is adjusted so that the power transmission efficiency reaches a peak in a state where the frequency of the current supplied to the resonance coil in the power transmission unit 220 is constant. In this method, the frequency of the current flowing through the resonance coil in the power transmission unit 220 and the resonance coil in the power reception unit 110 is constant regardless of the size of the air gap AG.
- a method using a matching unit provided between the power transmission unit 220 and the power supply unit 250 or a method using a converter on the power receiving side may be employed. it can.
- the second method is a method of adjusting the frequency of the current supplied to the resonance coil in the power transmission unit 220 based on the size of the air gap AG.
- the power transmission characteristic is the efficiency curve L ⁇ b> 1
- a current having a frequency f ⁇ b> 4 or a frequency f ⁇ b> 5 is supplied to the resonance coil in the power transmission unit 220.
- the frequency characteristics are the efficiency curves L2 and L3
- the current having the frequency f6 is supplied to the resonance coil in the power transmission unit 220.
- the frequency of the current flowing through the resonance coil in the power transmission unit 220 and the resonance coil in the power reception unit 110 is changed in accordance with the size of the air gap AG.
- the frequency of the current flowing through the resonance coil in the power transmission unit 220 is a fixed constant frequency.
- the frequency of the resonance coil in the power transmission unit 220 is determined by the air gap AG. The frequency changes appropriately.
- a current having a specific frequency set to increase power transmission efficiency is supplied to the resonance coil in the power transmission unit 220 by the first method, the second method, or the like.
- a magnetic field electromagnettic field
- the power receiving unit 110 receives power from the power transmitting unit 220 through a magnetic field that is formed between the power receiving unit 110 and the power transmitting unit 220 and vibrates at a specific frequency. Therefore, the “magnetic field oscillating at a specific frequency” is not necessarily a magnetic field having a fixed frequency.
- the frequency of the current supplied to the resonance coil in the power transmission unit 220 is set, but the power transmission efficiency is the resonance coil in the power transmission unit 220 and
- the resonance coil in the power receiving unit 110 also changes depending on other factors such as a horizontal shift, and the frequency of the current supplied to the resonance coil in the power transmission unit 220 is adjusted based on the other factors. There is a case.
- FIG. 6 is a diagram showing the relationship between the distance from the current source or the magnetic current source and the strength of the electromagnetic field.
- the electromagnetic field is composed of three components.
- the curve k1 is a component that is inversely proportional to the distance from the wave source, and is referred to as a “radiated electromagnetic field”.
- a curve k2 is a component inversely proportional to the square of the distance from the wave source, and is referred to as an “induction electromagnetic field”.
- the curve k3 is a component inversely proportional to the cube of the distance from the wave source, and is referred to as an “electrostatic magnetic field”.
- the wavelength of the electromagnetic field is “ ⁇ ”
- the distance at which the strengths of the “radiant electromagnetic field”, the “induction electromagnetic field”, and the “electrostatic magnetic field” are approximately equal can be expressed as ⁇ / 2 ⁇ .
- the “electrostatic magnetic field” is a region where the intensity of electromagnetic waves suddenly decreases with the distance from the wave source.
- this “electrostatic magnetic field” is a dominant near field (evanescent field). ) Is used to transmit energy (electric power). That is, in the near field where the “electrostatic magnetic field” is dominant, by resonating the power transmission unit 220 and the power reception unit 110 (for example, a pair of LC resonance coils) having adjacent natural frequencies, the power transmission unit 220 and the other power reception unit are resonated. Energy (electric power) is transmitted to 110. Since this "electrostatic magnetic field” does not propagate energy far away, the resonance method transmits power with less energy loss than electromagnetic waves that transmit energy (electric power) by "radiant electromagnetic field” that propagates energy far away. be able to.
- coupling coefficient (kappa) between a power transmission part and a power receiving part is about 0.3 or less, for example, Preferably, it is 0.1 or less.
- a coupling coefficient ⁇ in the range of about 0.1 to 0.3 can also be employed.
- the coupling coefficient ⁇ is not limited to such a value, and may take various values that improve power transmission.
- FIG. 7 is a circuit diagram showing a detailed configuration of the power transmission / reception system 10 shown in FIG.
- vehicle 100 includes rectifier 180, charging relay (CHR) 170, power storage device 190, system main relay (SMR) 115, power control, in addition to power receiving unit 110 and communication unit 160.
- a unit PCU (Power Control Unit) 120, a motor generator 130, a power transmission gear 140, drive wheels 150, a vehicle ECU (Electronic Control Unit) 300 as a control device, a current sensor 171 and a voltage sensor 172 are provided.
- the power receiving unit 110 includes a coil 111 (hereinafter referred to as a secondary self-resonant coil 111, which may be appropriately referred to as “resonant coil”), a capacitor 112, and a secondary coil 113.
- an electric vehicle is described as an example of vehicle 100, but the configuration of vehicle 100 is not limited to this as long as the vehicle can travel using electric power stored in the power storage device.
- Other examples of the vehicle 100 include a hybrid vehicle equipped with an engine and a fuel cell vehicle equipped with a fuel cell.
- the secondary self-resonant coil 111 receives power from the primary self-resonant coil 221 included in the power transmission device 200 by electromagnetic resonance using an electromagnetic field.
- the primary self-resonant coil 221 and the primary self-resonant coil 221 are based on the distance from the primary self-resonant coil 221 of the power transmission device 200, the resonant frequencies of the primary self-resonant coil 221 and the secondary self-resonant coil 111, and the like.
- the Q value indicating the resonance intensity with the secondary self-resonant coil 111 is increased (for example, Q> 100), and the coupling coefficient ( ⁇ ) indicating the degree of coupling is decreased (for example, 0.1 or less).
- the number of turns and the distance between the coils are appropriately set.
- the capacitor 112 is connected to both ends of the secondary self-resonant coil 111 and forms an LC resonant circuit together with the secondary self-resonant coil 111.
- the capacity of the capacitor 112 is appropriately set so as to have a predetermined resonance frequency according to the inductance of the secondary self-resonant coil 111. Note that the capacitor 112 may be omitted when a desired resonance frequency can be obtained with the stray capacitance of the secondary self-resonant coil 111 itself.
- the secondary coil 113 is provided coaxially with the secondary self-resonant coil 111 and can be magnetically coupled to the secondary self-resonant coil 111 by electromagnetic induction.
- the secondary coil 113 takes out the electric power received by the secondary self-resonant coil 111 by electromagnetic induction and outputs it to the rectifier 180.
- the rectifier 180 rectifies the AC power received from the secondary coil 113 and outputs the rectified DC power to the power storage device 190 via the CHR 170.
- the rectifier 180 may include a diode bridge and a smoothing capacitor (both not shown).
- a so-called switching regulator that performs rectification using switching control can be used.
- the rectifier 180 may be included in the power receiving unit 110 to prevent malfunction of the switching element due to the generated electromagnetic field. Therefore, it is more preferable to use a static rectifier such as a diode bridge.
- the DC power rectified by the rectifier 180 is directly output to the power storage device 190.
- the DC voltage after rectification is different from the charge voltage allowable by the power storage device 190, May be provided with a DC / DC converter (not shown) for voltage conversion between rectifier 180 and power storage device 190.
- a load resistor 173 for position detection and a relay 174 connected in series are connected to the output portion of the rectifier 180.
- weak power is transmitted from the power transmission device 200 to the vehicle as a test signal.
- relay 174 is controlled by control signal SE3 from vehicle ECU 300 to be in a conductive state.
- the voltage sensor 172 is provided between a pair of power lines connecting the rectifier 180 and the power storage device 190. Voltage sensor 172 detects the DC voltage on the secondary side of rectifier 180, that is, the received voltage received from power transmission device 200, and outputs the detected value VC to vehicle ECU 300. The vehicle ECU 300 determines the power reception efficiency based on the voltage VC, and transmits information related to the power reception efficiency to the power transmission device via the communication unit 160.
- Current sensor 171 is provided on a power line connecting rectifier 180 and power storage device 190.
- Current sensor 171 detects a charging current for power storage device 190 and outputs the detected value IC to vehicle ECU 300.
- CHR 170 is electrically connected to rectifier 180 and power storage device 190.
- CHR 170 is controlled by a control signal SE2 from vehicle ECU 300, and switches between supply and interruption of power from rectifier 180 to power storage device 190.
- the power storage device 190 is a power storage element configured to be chargeable / dischargeable.
- the power storage device 190 includes, for example, a secondary battery such as a lithium ion battery, a nickel metal hydride battery, or a lead storage battery, and a power storage element such as an electric double layer capacitor.
- the power storage device 190 is connected to the rectifier 180 via the CHR 170.
- the power storage device 190 stores the power received by the power receiving unit 110 and rectified by the rectifier 180.
- the power storage device 190 is also connected to the PCU 120 via the SMR 115.
- Power storage device 190 supplies power for generating vehicle driving force to PCU 120. Further, power storage device 190 stores the electric power generated by motor generator 130.
- the output of power storage device 190 is, for example, about 200V.
- power storage device 190 is provided with a voltage sensor and a current sensor for detecting voltage VB of power storage device 190 and input / output current IB. These detection values are output to vehicle ECU 300. Vehicle ECU 300 calculates the state of charge of power storage device 190 (also referred to as “SOC (State Of Charge)”) based on voltage VB and current IB.
- SOC State Of Charge
- SMR 115 is inserted in a power line connecting power storage device 190 and PCU 120.
- SMR 115 is controlled by control signal SE ⁇ b> 1 from vehicle ECU 300, and switches between supply and interruption of power between power storage device 190 and PCU 120.
- the PCU 120 includes a converter and an inverter (not shown).
- the converter is controlled by a control signal PWC from vehicle ECU 300 to convert the voltage from power storage device 190.
- the inverter is controlled by a control signal PWI from vehicle ECU 300 and drives motor generator 130 using electric power converted by the converter.
- the motor generator 130 is an AC rotating electric machine, for example, a permanent magnet type synchronous motor including a rotor in which a permanent magnet is embedded.
- the output torque of the motor generator 130 is transmitted to the drive wheels 150 via the power transmission gear 140 to cause the vehicle 100 to travel.
- the motor generator 130 can generate electric power by the rotational force of the drive wheels 150 during the regenerative braking operation of the vehicle 100. Then, the generated power is converted by PCU 120 into charging power for power storage device 190.
- a necessary vehicle driving force is generated by operating the engine and the motor generator 130 in a coordinated manner.
- the power storage device 190 can be charged using the power generated by the rotation of the engine.
- Communication unit 160 is a communication interface for performing wireless communication between vehicle 100 and power transmission device 200 as described above.
- Communication unit 160 outputs battery information INFO including SOC of power storage device 190 from vehicle ECU 300 to power transmission device 200.
- Communication unit 160 outputs signals STRT and STP instructing start and stop of power transmission from power transmission device 200 to power transmission device 200.
- vehicle ECU 300 includes a CPU (Central Processing Unit), a storage device, and an input / output buffer, and inputs signals from each sensor and outputs control signals to each device.
- the vehicle 100 and each device are controlled. Note that these controls are not limited to processing by software, and can be processed by dedicated hardware (electronic circuit).
- vehicle ECU 300 When vehicle ECU 300 receives charge start signal TRG by a user operation or the like, vehicle ECU 300 outputs a signal STRT instructing the start of power transmission to power transmission device 200 via communication unit 160 based on the fact that a predetermined condition is satisfied. . In addition, vehicle ECU 300 outputs a signal STP instructing to stop power transmission to power transmission device 200 through communication unit 160 based on the fact that power storage device 190 is fully charged or an operation by the user.
- the power transmission device 200 includes a charging stand 210 and a power transmission unit 220.
- charging stand 210 further includes a power transmission ECU 240 that is a control device, a power supply unit 250, a display unit 242, and a fee receiving unit 246.
- the power transmission unit 220 includes a coil 221 (hereinafter referred to as a primary self-resonant coil 221, which may be appropriately called “resonance coil”), a capacitor 222, and a primary coil 223.
- the power supply unit 250 is controlled by a control signal MOD from the power transmission ECU 240, and converts power received from an AC power supply such as a commercial power supply into high-frequency power. Then, the power supply unit 250 supplies the converted high frequency power to the primary coil 223.
- FIG. 7 does not show a matching unit that performs impedance conversion, but a matching unit may be provided between the power supply unit 250 and the power transmission unit 220 or between the power reception unit 110 and the rectifier 180.
- the primary self-resonant coil 221 transfers electric power to the secondary self-resonant coil 111 included in the power receiving unit 110 of the vehicle 100 by electromagnetic resonance.
- the primary self-resonant coil 221 and the secondary self-resonant coil 221 are arranged based on the distance from the secondary self-resonant coil 111 of the vehicle 100, the resonance frequency of the primary self-resonant coil 221 and the secondary self-resonant coil 111, and the like.
- the Q number indicating the resonance strength with the self-resonant coil 111 is increased (for example, Q> 100), and the number of turns and the distance between the coils are reduced so that the coupling coefficient ⁇ indicating the coupling degree is decreased (for example, 0.1 or less).
- the distance is set as appropriate.
- the capacitor 222 is connected to both ends of the primary self-resonant coil 221 and forms an LC resonance circuit together with the primary self-resonant coil 221.
- the capacitance of the capacitor 222 is appropriately set so as to have a predetermined resonance frequency according to the inductance of the primary self-resonant coil 221. Note that the capacitor 222 may be omitted when a desired resonance frequency is obtained with the stray capacitance of the primary self-resonant coil 221 itself.
- the primary coil 223 is provided coaxially with the primary self-resonant coil 221 and can be magnetically coupled to the primary self-resonant coil 221 by electromagnetic induction.
- the primary coil 223 transmits the high frequency power supplied through the matching unit 260 to the primary self-resonant coil 221 by electromagnetic induction.
- the communication unit 230 is a communication interface for performing wireless communication between the power transmission device 200 and the vehicle 100 as described above.
- Communication unit 230 receives battery information INFO transmitted from communication unit 160 on vehicle 100 side and signals STRT and STP instructing start and stop of power transmission, and outputs these information to power transmission ECU 240.
- the power transmission ECU 240 causes the power supply unit 250 to transmit a test signal based on weak power.
- weak power is power that is smaller than charging power for charging the battery after authentication, or power that is transmitted at the time of alignment, and may include power that is transmitted intermittently.
- Vehicle ECU 300 transmits control signals SE2 and SE3 so that relay 174 is turned on and CHR 170 is turned off in order to receive the test signal. Then, the power receiving efficiency and the charging efficiency are calculated based on the voltage VC. Vehicle ECU 300 transmits the calculated charging efficiency or power receiving efficiency to power transmission device 200 through communication unit 160.
- the display unit 242 of the power transmission device 200 displays the charging efficiency and the corresponding charging power unit price to the user.
- the display unit 242 also has a function as an input unit like a touch panel, for example, and can accept an input as to whether or not the user approves the charging power unit price.
- the power transmission ECU 240 causes the power supply unit 250 to start full-scale charging when the charging power unit price is approved. When charging is completed, the charge receiving unit 246 settles the charge.
- the power transmission ECU 240 includes a CPU, a storage device, and an input / output buffer.
- the power transmission ECU 240 inputs a signal from each sensor and outputs a control signal to each device. Control the equipment. Note that these controls are not limited to processing by software, and can be processed by dedicated hardware (electronic circuit).
- the relationship regarding the power transmission unit 90 and the power receiving unit 91 demonstrated in FIG. 3, FIG. 4 is materialized.
- the difference between the natural frequency of the power transmission unit 220 and the natural frequency of the power reception unit 110 is ⁇ 10% or less of the natural frequency of the power transmission unit 220 or the natural frequency of the power reception unit 110.
- the power transmission efficiency can be increased.
- the difference between the natural frequencies is larger than ⁇ 10%, the power transmission efficiency is smaller than 10%, and the power transmission time becomes longer.
- Vehicle 100 further includes a display unit 142 that communicates with power transmission device 200 and displays a determination result as to whether power transmission unit 220 is compatible with power reception unit 110 of vehicle 100.
- FIG. 8 is a diagram illustrating a modification of the power transmission unit and the power reception unit. As shown in FIG. 8, the electromagnetic induction coils 113 and 223 of FIG. 7 may not be interposed.
- the power transmission device 200 is provided with a power transmission unit 220 ⁇ / b> K
- the vehicle 100 is provided with a power reception unit 110 ⁇ / b> K.
- the power transmission unit 220K includes a self-resonant coil 221 connected to the power supply unit 250 and a capacitor 222 connected to the power supply unit 250 in parallel with the self-resonant coil 221.
- the power receiving unit 110K includes a self-resonant coil 121 connected to the rectifier 180 and a capacitor 112 connected to the rectifier 180 in parallel with the self-resonant coil 121.
- the coil type of the power transmission unit and the power reception unit is a center type in which magnetic flux passes through the center (circular coil type: Circular Coil Type), and a double-ended type in which magnetic flux passes from one end to the other end (Polarized Coil Type).
- the both-end type is further classified into a both-ends front-rear type and a both-ends left-right type depending on whether the direction in which the magnetic flux passes is the front-rear direction or the left-right direction of the vehicle.
- FIG. 9 is a diagram for explaining a central coil unit.
- the power transmission unit includes a power transmission coil 221A
- the power reception unit includes a power reception coil 111A.
- FIG. 10 is a diagram for explaining a passage path of magnetic flux of the central coil unit.
- magnetic flux passes through the central portion of a circular coil.
- a portion near the center of the outer circle of the circular coil and having no winding is called a center portion.
- the magnetic flux that has passed from the central part of the power transmission coil 221A to the central part of the power receiving coil 111A passes through the inside of the magnetic material 411A toward the outside, returns outside the coil winding, and the inside of the magnetic material 421A goes to the central part. And then return to the center of the power transmission coil 221A. Since an alternating current flows through the power transmission unit, when the direction of the current flowing through the coil is reversed, the direction of the magnetic flux is also reversed.
- FIG. 11 is a diagram for explaining a double-ended coil unit.
- the power transmission unit includes a power transmission coil 221B
- the power reception unit includes a power reception coil 111B.
- the power transmission coil 221B is wound around a flat magnetic material 421B.
- the power receiving coil 111B is wound around a flat magnetic material 411B.
- FIG. 12 is a diagram for explaining a magnetic flux passing path of the both-end type coil unit.
- magnetic flux passes through the central portion (inside the magnetic material) of the coil wound around the magnetic material.
- the magnetic flux that has passed through the inside of the magnetic material 421B from one end of the power transmission coil 221B toward the other end is directed to one end of the power receiving coil 111B, and the inside of the magnetic material 411B is directed from one end of the power receiving coil 111B to the other end. And return to one end of the power transmission coil 221B. Since an alternating current flows through the power transmission unit, when the direction of the current flowing through the coil is reversed, the direction of the magnetic flux is also reversed.
- the direction in which the magnetic flux passes through the coils is different from that of the central coil unit. It can be a front-rear direction or a vehicle left-right direction (vehicle width direction).
- FIG. 13 is a view for explaining a both-ends front and rear type coil unit.
- both-ends front-rear receiving coil 111 ⁇ / b> BY is arranged in the vehicle such that the direction of magnetic flux passage is the front-rear direction of the vehicle.
- the power receiving coil 111BY is arranged in the vehicle such that the coil winding axis direction is the front-rear direction of the vehicle.
- FIG. 14 is a view for explaining a double-ended left-right coil unit.
- both-end left-right power receiving coil 111 ⁇ / b> BX is arranged in the vehicle such that the magnetic flux passes in the left-right direction of the vehicle.
- the power receiving coil 111BY is arranged in the vehicle such that the coil winding axis direction is the left-right direction of the vehicle.
- both-end type coil units are arranged in the vehicle 100 in FIGS. 13 and 14, the case where both-end type coil units are arranged in the vehicle 100 has been described as an example. However, in the power transmission device, whether the direction of magnetic flux passage is the front-rear direction or the left-right direction when the vehicle is parked. Thus, both-end type coil units can be classified into both-end front-rear type and both-end left-right type coil units.
- FIG. 15 is a diagram for explaining the operation of the contactless power transmission and reception system according to the first embodiment.
- vehicle 100A is a vehicle on which central power receiving coil 111A is mounted.
- vehicle 100B is a vehicle on which a both-end type power receiving coil 111B is mounted.
- Vehicles 100A and 100B transmit a message M1 including whether the type of the coil unit mounted on the vehicle is a central type, a front / rear type, or a left / right type to the communication unit 230 of the power transmission apparatus.
- the information indicating the coil types of the center type, the both-ends front-rear type, and the both-ends left-right type is an example of information indicating magnetic flux passage characteristics indicating how the magnetic flux passes through the coil unit.
- the information to be transmitted may be expressed in another format as long as the information indicates magnetic flux passage characteristics.
- the user can know whether or not charging is possible at the charging facility without having to park the vehicle at the parking position. Therefore, it is convenient when the user determines whether to use the charging facility.
- FIG. 16 is a flowchart for illustrating control executed by the vehicle and the power transmission device in the first embodiment.
- step S10 vehicle ECU 300 monitors the presence or absence of a charging request.
- vehicle ECU 300 transmits a request for charging to power transmission device 200 via communication unit 160. Then, the process proceeds from step S10 to step S20.
- step S110 the power transmission ECU 240 monitors whether there is a charge request.
- the communication unit 160 of the vehicle 100 transmits a charge request and the power transmission ECU 240 detects the charge request via the communication unit 230, the process proceeds from step S110 to step S120.
- step S20 information regarding the coil type of power reception unit 110 is transmitted to power transmission device 200 by communication unit 160.
- information regarding the coil type of power reception unit 110 is received by communication unit 230 in step S120. Is done.
- the information on the coil type includes, for example, information on whether the coil is a central type, a double-ended type, a double-ended type, or a double-ended type.
- step S130 the power transmission ECU 240 determines whether or not the coil type of the power receiving unit matches the coil type of the power transmission unit based on the information regarding the coil type of the power receiving unit received in step S120.
- step S130 If the coil type is incompatible in step S130, the process proceeds to step S150, and the power transmission ECU 240 finalizes the determination that charging is not possible. On the other hand, if the coil type is compatible in step S130, the process proceeds to step S140, and power transmission ECU 240 determines the determination that charging is possible.
- step S160 power transmission ECU 240 transmits the determination result determined in either step S140 or step S150 to vehicle ECU 300.
- step S170 the power transmission ECU 240 also displays the determination result on the display unit 242 of the power transmission device 200.
- the determination result is received by the communication unit 160 in step S30, and in step S40, the vehicle ECU 300 displays the determination result on the display unit 142 such as a liquid crystal display (not shown). Note that the determination result may be notified to the driver by voice instead of the display on the display unit 142.
- FIG. 17 is a diagram for explaining the operation of the non-contact power transmission / reception system according to the modification of the first embodiment.
- vehicle 100A is a vehicle on which a central power receiving coil 111A is mounted.
- vehicle 100B is a vehicle on which a both-end type power receiving coil 111B is mounted.
- a central power transmission unit 220 is installed in the power transmission device 200 as a charging infrastructure.
- the communication unit 230 of the power transmission apparatus transmits a message M3 including whether the type of the coil unit installed in the power transmission apparatus is a central type, a both-ends front-rear type, or a both-ends left-right type to the communication unit 230 of the power transmission apparatus.
- the information indicating the coil types of the center type, the both ends front and back types, and the both ends left and right types is an example of information indicating the magnetic flux passing characteristics.
- the information to be transmitted may be expressed in another format as long as the information indicates magnetic flux passage characteristics.
- each ECU of the vehicles 100A and 100B determines whether or not charging is possible with the charging infrastructure, and displays the result to the vehicle user.
- the user can know whether or not charging is possible at the charging facility without parking the vehicle at the parking position. Therefore, it is convenient when the user determines whether to use the charging facility.
- FIG. 18 is a flowchart for illustrating control executed by the vehicle and the power transmission device in the modification of the first embodiment.
- step S310 vehicle ECU 300 monitors whether there is a charge request.
- vehicle ECU 300 transmits a request for charging to power transmission device 200 via communication unit 160. Then, the process proceeds from step S310 to step S320.
- step S210 the power transmission ECU 240 monitors whether there is a charge request.
- a request for charging is transmitted from communication unit 160 of vehicle 100 and power transmission ECU 240 detects a charging request via communication unit 230, the process proceeds from step S210 to step S220.
- step S220 information regarding the coil type of power transmission unit 220 is transmitted to vehicle 100 by communication unit 230.
- vehicle 100 information regarding the coil type of power transmission unit 220 is received by communication unit 160 in step S320.
- the information on the coil type includes, for example, information on whether the coil is a central type, a double-ended type, a double-ended type, or a double-ended type.
- step S330 vehicle ECU 300 determines whether or not the coil type of power transmission unit 220 matches the coil type of power reception unit 110 based on the information regarding the coil type of power transmission unit 220 received in step S320.
- step S330 If the coil type is incompatible in step S330, the process proceeds to step S350, and the vehicle ECU 300 finalizes the determination that charging is not possible. On the other hand, if the coil type is compatible in step S330, the process proceeds to step S340, and vehicle ECU 300 determines that charging is possible.
- step S360 vehicle ECU300 transmits the determination result fixed in either step S340 or step S350 to power transmission ECU240.
- vehicle ECU 300 displays the determination result on display unit 142 in step S370.
- the determination result is received by the communication unit 230 in step S230, and the determination result is displayed on the display unit 242 such as a liquid crystal display in step S240.
- the display unit 242 such as a liquid crystal display in step S240.
- it may replace with the display on the display part 242, and may alert
- FIG. 19 is a diagram for explaining the operation of the non-contact power transmission and reception system according to the second embodiment.
- vehicle 100 is equipped with a power receiving unit 110 including a center type or both end type coil unit.
- the power transmission device includes a power transmission unit 220A and a power transmission unit 220B.
- the power transmission unit 220A includes a central coil unit.
- the power transmission unit 220B includes a double-ended coil unit.
- the vehicle 100 transmits to the communication unit 230 of the power transmission device a message M5 including whether the type of the coil unit mounted on the vehicle is a central type, a front / rear type, or a left / right type.
- the information indicating the coil types of the center type, the both ends front and back types, and the both ends left and right types is an example of information indicating the magnetic flux passing characteristics.
- the information to be transmitted may be expressed in another format as long as the information indicates magnetic flux passage characteristics.
- the power transmission device 200 Based on the information received by the communication unit 230, the power transmission device 200 selects and uses a power transmission unit corresponding to the power reception unit of the vehicle.
- the power transmission / reception system of the second embodiment can cope with various vehicles even when there are a plurality of coil types of the power reception unit mounted on the vehicle.
- FIG. 20 is a diagram for explaining the operation of the non-contact power transmission / reception system of the modified example of FIG. Referring to FIG. 20, vehicle 100 is equipped with a power receiving unit 110 including a center type or both end type coil unit.
- the power transmission device includes a power transmission unit 220AB whose configuration can be changed.
- the power transmission unit 220AB can mutually change the configuration corresponding to the center type coil unit and the configuration corresponding to the both end type coil unit by a switching signal.
- the vehicle 100 transmits to the communication unit 230 of the power transmission device a message M5 including whether the type of the coil unit mounted on the vehicle is a central type, a front / rear type, or a left / right type.
- the information indicating the coil types of the center type, the both ends front and back types, and the both ends left and right types is an example of information indicating the magnetic flux passing characteristics.
- the information to be transmitted may be expressed in another format as long as the information indicates magnetic flux passage characteristics.
- the power transmission device 200 Based on the information received by the communication unit 230, the power transmission device 200 changes the configuration of the power transmission unit 220AB so as to have a configuration corresponding to the power reception unit of the vehicle.
- the power transmission / reception system shown in FIG. 20 can cope with various types of vehicles even when there are a plurality of coil types of power reception units mounted on the vehicle.
- FIG. 21 is a diagram illustrating a configuration example of the power transmission unit 220AB in FIG.
- the power transmission unit 220AB includes a flat magnetic material 421 and coils 221-1 and 221-2 wound around the magnetic material 421.
- the coils 221-1 and 221-2 are separately wound around the central portion of the magnetic material 421.
- FIG. 22 is a cross-sectional view taken along the line XXII-XXII of FIG. 21 when operated in the operation mode C.
- the operation mode C is a mode in which the power transmission unit 220AB operates so as to have a magnetic flux distribution corresponding to the central coil unit.
- FIG. 22 illustrates a state where the power transmission unit 220AB and the power reception unit 110 including the central power reception coil 111A face each other.
- a magnetic flux passes from a portion between the coils 221-1 and 221-2 (hereinafter referred to as a central portion) toward the power receiving coil.
- the magnetic flux that has passed from the center of the power transmission unit 220AB to the center of the power receiving coil 111A passes through the inside of the magnetic material 411A toward the outside, returns to the outside of the coil winding, and faces the inside of the magnetic material 421 toward the center. And return to the center of the power transmission unit 220AB. Since an alternating current flows through the power transmission unit 220AB, when the direction of the current flowing through the coil is reversed, the direction of the magnetic flux is also reversed.
- FIG. 23 is a cross-sectional view taken along the line XXII-XXII of FIG. 21 when operating in the operation mode P.
- the operation mode P is a mode in which the power transmission unit 220AB operates so as to have a magnetic flux distribution corresponding to both-end type coil units.
- FIG. 23 shows a state where the power transmission unit 220AB and the power reception unit 110 including the both-end type power reception coil 111B are opposed to each other.
- the power transmission unit 220AB passes a magnetic flux from the end of the magnetic material 421 on the coil 221-2 side toward the end of the magnetic material 421 on the coil 221-1 side.
- the magnetic flux that has passed through the inside of the magnetic material 421 from the coil 221-2 toward the coil 221-1 is directed toward one end of the power receiving coil 111B, and the inside of the magnetic material 411B is directed from one end to the other end of the power receiving coil 111B.
- the coil 221-2 returns to the end of the magnetic material 421 side. Since an alternating current flows through the power transmission unit 220AB, when the direction of the current flowing through the coil is reversed, the direction of the magnetic flux is also reversed.
- FIG. 24 is a circuit diagram showing a first configuration example for switching the connection between the coil 221-1 and the coil 221-2.
- switching unit 502 includes relays SWC1 to SWC3 and relays SWP1 and SWP2.
- the relays SWC1 to SWC3 are controlled to be conductive, and the relays SWP1 and SWP2 are controlled to be nonconductive.
- currents flow through the coils 221-1 and 221-2 in different directions in the cross-sectional view.
- the relays SWC1 to SWC3 are controlled to be in a non-conductive state, and the relays SWP1 and SWP2 are controlled to be in a conductive state.
- the operation mode P as described with reference to FIG. 23, currents flow in the coils 221-1 and 221-2 in different directions in the cross-sectional view.
- FIG. 25 is a circuit diagram showing a second configuration example for switching the connection between the coil 221-1 and the coil 221-2.
- switching unit 504 includes relays SWC4 and SWC5 and relay SWP3.
- the relays SWC4 and SWC5 are controlled to be in a conductive state, and the relay SWP3 is controlled to be in a non-conductive state.
- currents flow through the coils 221-1 and 221-2 in different directions in the cross-sectional view.
- the relays SWC4 and SWC5 are controlled to be in a non-conductive state, and the relay SWP3 is controlled to be in a conductive state.
- the operation mode P as described with reference to FIG. 23, currents flow in the coils 221-1 and 221-2 in different directions in the cross-sectional view.
- FIG. 26 is a circuit diagram showing a third configuration example for switching the connection between the coil 221-1 and the coil 221-2.
- switching unit 506 includes switches SW6 and SW7.
- the switches SW6 and SW7 are both controlled to select the C terminal.
- currents flow through the coils 221-1 and 221-2 in different directions in the cross-sectional view.
- both the switches SW6 and SW7 are controlled to select the P terminal.
- currents flow in the coils 221-1 and 221-2 in different directions in the cross-sectional view.
- FIG. 27 is a flowchart for illustrating control executed by the vehicle and the power transmission device in the second embodiment.
- step S410 vehicle ECU 300 monitors the presence or absence of a charging request.
- charging start signal TRG is input by a user operation or the like
- vehicle ECU 300 transmits a request for charging to power transmission device 200 via communication unit 160. Then, the process proceeds from step S410 to step S420.
- step S510 the power transmission ECU 240 monitors whether there is a charge request.
- a request for charging is transmitted from communication unit 160 of vehicle 100 and power transmission ECU 240 detects a charging request via communication unit 230, the process proceeds from step S510 to step S520.
- step S420 information regarding the coil type of power reception unit 110 is transmitted to power transmission device 200 by communication unit 160.
- step S520 information regarding the coil type of power reception unit 110 is received by communication unit 230 in step S520.
- step S530 the coil type of the power transmission unit 220 is determined.
- the information on the coil type includes, for example, information on whether the coil is a central type, a double-ended type, a double-ended type, or a double-ended type.
- step S540 power transmission ECU 240 determines whether or not the coil type of power reception unit 110 matches the coil type that power transmission unit 220 can configure based on the information regarding the coil type of power reception unit 110 received in step S520. to decide. If the coil type is compatible, it is determined that charging is possible, and if it is not compatible, it is determined that charging is not possible.
- step S540 If the coil type is incompatible in step S540, the process proceeds to step S610, and the power transmission ECU 240 finalizes the determination that charging is not possible, causes the display unit 242 to display a charging impossible display, and causes the vehicle 100 to determine the determination result. Is transmitted, and the processing on the power transmission device 200 side ends in step S620.
- step S540 if the coil type is suitable in step S540, that is, if a power transmission coil that can be adapted to the vehicle coil type can be selected, the process proceeds to step S550, and power transmission ECU 240 determines that charging is possible. The determination result is displayed and the determination result is displayed on the display unit 242, and the determination result is transmitted to the vehicle 100.
- the determination result is received by communication unit 160 in step S430, and in step S440, vehicle ECU 300 causes display unit 142 such as a liquid crystal display to display the determination result. Note that the determination result may be notified to the driver by voice instead of the display on the display unit 142.
- step S560 After the chargeable display is displayed in step S550, it is determined in step S560 whether the coil type of vehicle 100 is the central type. If it is determined in step S550 that the coil type is the central type, the process proceeds to step S570, and the power transmission ECU 240 selects a configuration that can correspond to the central type as the coil type of the power transmission unit 220. In this selection, as shown in FIG. 19, a corresponding one of a plurality of power transmission units can be used and no other power transmission unit can be used, or as shown in FIGS. It is also possible to adopt a configuration corresponding to the center type by switching the connection of the coil unit.
- step S560 If it is determined in step S560 that the coil type is not the central type, the process proceeds to step S580, and the power transmission ECU 240 selects a configuration that can support both-end types as the coil type of the power transmission unit 220. In this selection, as shown in FIG. 19, a corresponding one of a plurality of power transmission units can be used and no other power transmission unit can be used, or as shown in FIGS. It is also possible to adopt a configuration corresponding to the both-end type by switching the connection of the coil unit. In the path from step S560 to step S580, it may be further determined whether the coil type is the both-ends front-rear type or the both-ends left-right type, and the corresponding configuration may be selected.
- step S570 After the coil configuration is selected in step S570 or S580, the power transmission ECU 240 starts a charging sequence for the vehicle in step S590, and the process moves to a charging process routine in step S600.
- step S450 it is determined whether or not charging is possible based on the charging determination result from the power transmission device. If charging is not possible in step S450, the process proceeds to step S480, and the charging process on the vehicle side ends.
- step S450 If charging is possible in step S450, the process proceeds to step S460.
- step S590 In synchronization with the start of the charging sequence in step S590, communication for instructing the start of charging is also performed on the vehicle side, and the charging sequence is also started in step S460 on the vehicle side.
- step S470 the process moves to the charging process routine.
- FIG. 28 is a diagram showing a further modification of the coil shown in FIG.
- power transmission unit 220AB2 includes cross-shaped magnetic material 421 and coils 221-1X, 221-2X, 221-1Y wound around magnetic material 421 in four parts. , 221-2Y.
- the coil 221-1X and the coil 221-2X are selected and used.
- the coils 221-1Y and 221-2Y that are not selected are not used.
- the connection is determined so that currents in the same direction flow through the coils 221-1X and 221-2X.
- the coil 221-1Y and the coil 221-2Y are selected and used. In this case, the coils 221-1X and 221-2X are not used. Similarly to the case described with reference to FIG. 23, the connection is determined so that currents in the same direction flow through the coils 221-1Y and 221-2Y.
- the coil 221-1X and the coil 221-2X are selected and used. In this case, the coils 221-1Y and 221-2Y are not used. Similarly to the case described with reference to FIG. 22, the connections are determined so that currents in different directions flow through the coils 221-1X and 221-2X.
- the coils 221-1Y and 221-2Y are selected, and currents in different directions flow through the coils 221-1Y and 221-2Y.
- the connection may be determined as follows.
- a pair of the coil 221-1X and the coil 221-2X and a pair of the coils 221-1Y and 221-2Y may be used at the same time so that the current flows so that the magnetic flux is emitted from the central portion of the cross. Good.
- FIG. 29 is a diagram for explaining the operation of the non-contact power transmission and reception system according to the modification of the second embodiment.
- a power transmission unit 220 including a central type or both end type coil unit is mounted on the power transmission device.
- Vehicle 100 includes a power receiving unit 110A and a power receiving unit 110B.
- the power receiving unit 110A includes a central coil unit.
- the power receiving unit 110B includes a double-ended coil unit.
- the power transmission apparatus transmits a message M6 including whether the type of the coil unit held is the central type, the both-end front-rear type, or the both-ends left-right type from the communication unit 230 to the vehicle 100.
- the information indicating the coil types of the center type, the both ends front and back types, and the both ends left and right types is an example of information indicating the magnetic flux passing characteristics.
- the information to be transmitted may be expressed in another format as long as the information indicates magnetic flux passage characteristics.
- the vehicle Based on the information received from the communication unit 230, the vehicle selects and uses a power receiving unit corresponding to the power transmission unit of the power transmission device.
- the power transmission / reception system according to the modification of the second embodiment can cope with various power transmission devices even when there are a plurality of coil types of the power transmission unit of the power transmission device.
- FIG. 30 is a diagram for explaining the operation of a modification of the non-contact power transmission / reception system of FIG.
- a power transmission unit 220 including a central type or both end type coil unit is mounted on the power transmission device.
- Vehicle 100 includes a power receiving unit 110AB whose configuration can be changed.
- the power receiving unit 110AB can change the configuration corresponding to the central coil unit and the configuration corresponding to the both-end coil unit with each other by a switching signal.
- Such a switchable power receiving unit 110AB can adopt the same configuration as the power transmission unit shown in FIGS. 24, 25, 26, and 28.
- the power transmission apparatus transmits a message M6 including whether the type of the coil unit held is the central type, the both-end front-rear type, or the both-ends left-right type from the communication unit 230 to the vehicle 100.
- the information indicating the coil types of the center type, the both ends front and back types, and the both ends left and right types is an example of information indicating the magnetic flux passing characteristics.
- the information to be transmitted may be expressed in another format as long as the information indicates magnetic flux passage characteristics.
- the vehicle Based on the information received from the communication unit 230, the vehicle changes the configuration of the power reception unit 110AB to a configuration corresponding to the power transmission unit of the power transmission device.
- the power transmission / reception system shown in FIG. 30 can cope with various power transmission devices even when there are a plurality of coil types of the power transmission unit installed in the power transmission device, as in FIG.
- FIG. 31 is a flowchart for illustrating control executed by the vehicle and the power transmission device in the modification of the second embodiment.
- step S810 vehicle ECU 300 monitors the presence or absence of a charge request.
- vehicle ECU 300 transmits a request for charging to power transmission device 200 via communication unit 160. Then, the process proceeds from step S810 to step S820.
- step S710 the power transmission ECU 240 monitors whether there is a charge request.
- a request for charging is transmitted from communication unit 160 of vehicle 100 and power transmission ECU 240 detects a charging request via communication unit 230, the process proceeds from step S710 to step S720.
- step S720 information regarding the coil type of power transmission unit 220 is transmitted to vehicle 100 by communication unit 230.
- vehicle 100 information regarding the coil type of power transmission unit 220 is received by communication unit 160 in step S820.
- step S830 the coil type of power transmission unit 220 is determined.
- the information on the coil type includes, for example, information on whether the coil is a central type, a double-ended type, a double-ended type, or a double-ended type.
- step S840 vehicle ECU 300 determines whether or not the coil type of the power transmission unit matches the coil type that can be configured by the power receiving unit, based on the information regarding the coil type of the power transmission unit received in step S820. If the coil type is compatible, it is determined that charging is possible, and if it is not compatible, it is determined that charging is not possible.
- step S840 If the coil type is incompatible in step S840, the process proceeds to step S910, and the vehicle ECU 300 finalizes the determination that charging is not possible and causes the display unit 142 to display the determination result and transmits the determination result to the power transmission device 200.
- the vehicle-side process ends in step S920.
- step S840 if the coil type is suitable in step S840, that is, if a power receiving coil that can correspond to the coil type of the power transmission device can be selected, the process proceeds to step S850, and vehicle ECU 300 determines that charging is possible. Is determined and displayed on the display unit 142, and the determination result is transmitted to the power transmission device 200.
- the determination result is received by the communication unit 230 in step S730, and in step S740, the power transmission ECU 240 displays the determination result on the display unit 242 such as a liquid crystal display. In addition, it may replace with the display on the display part 242, and may alert
- step S860 it is determined in step S860 whether the coil type of power transmission device 200 is the central type. If it is determined in step S850 that the coil type is the central type, the process proceeds to step S870, and the vehicle ECU 300 selects a configuration that can support the central type as the coil type of the power receiving unit 110. As shown in FIG. 29, this selection may be made so that a corresponding one of the plurality of power receiving units 110A and 110B can be used and no other power transmission unit is used, or as shown in FIG. Alternatively, a configuration corresponding to the central type may be adopted by switching the connection of the coil units inside the power receiving unit 110AB.
- step S860 If it is determined in step S860 that the coil type is not the central type, the process proceeds to step S880, and the vehicle ECU 300 selects a configuration that can support both-end type as the coil type of the power receiving unit 110. As shown in FIG. 29, this selection may be made so that a corresponding one of the plurality of power receiving units 110A and 110B can be used and no other power transmission unit is used, or as shown in FIG. Alternatively, the connection of the coil unit inside the power receiving unit 110AB may be switched to correspond to the both-end type. In the path from step S860 to step S880, it may be further determined whether the coil type is the both-ends front-rear type or the both-ends left-right type, and the corresponding configuration may be selected.
- step S870 or S880 After the coil configuration is selected in step S870 or S880, the vehicle ECU 300 starts a charging sequence for the vehicle in step S890, and the process moves to a charging processing routine in step S900.
- step S750 power transmission device 200 determines whether or not charging is possible based on the determination result of whether or not the vehicle can be charged. If charging is not possible in step S750, the process proceeds to step S780, and the charging process in power transmission device 200 ends.
- step S750 If charging is possible in step S750, the process proceeds to step S760.
- step S890 communication to start charging from the vehicle to the power transmission device is performed, and the charging sequence is also started in step S760 on the power transmission device side.
- step S770 the process moves to a charging process routine.
- the contactless power transmission device illustrated in FIGS. 7, 8, and 18 is a contactless power transmission device that can transmit power to the power receiving device (vehicle 100) in a contactless manner, and is configured to be able to transmit power to the power receiving device in a contactless manner.
- Power transmission unit 220, and a communication unit 230 that transmits information on the magnetic flux distribution of the power transmission unit during power transmission to the power receiving device.
- this information is used to determine whether the power receiving device (vehicle 100) receives power from the non-contact power transmitting device (power transmitting device 200).
- the communication unit 230 transmits information before the power transmission unit 220 starts power transmission to the power receiving device (the vehicle 100).
- the information includes information on a structure of a part constituting the power transmission unit that affects a magnetic flux distribution generated in the power transmission unit 200 during power transmission or a parameter of the power transmission unit.
- the structure of the component includes, for example, a coil type such as a center type, a both-end type, a front and rear type, and a left and right type.
- the structure of the component also includes information such as the core shape, winding direction, and winding direction.
- the information regarding the parameter of the power transmission unit includes, for example, a parameter indicating a magnetic flux distribution generated in the power transmission unit.
- the power transmission device 200 shown in FIGS. 7, 8, and 19 to 28 is a power transmission device capable of transmitting power to the power receiving device (vehicle 100) in a contactless manner, and is contactless to the power receiving device (the vehicle 100).
- a power transmission unit 220AB configured to transmit power and an adjustment device (switching units 502 to 506) that can adjust the magnetic flux distribution of the power transmission unit 220 during power transmission.
- power transmission device 200 adjusts based on information about the power receiving device so that the magnetic flux distribution of power transmission unit 220 during power transmission is a magnetic flux distribution that matches the power receiving device (vehicle 100).
- a control unit (power transmission ECU 240) for controlling the apparatus is further provided.
- the power receiving device (vehicle 100) shown in FIGS. 8 and 16 is a non-contact power receiving device that can receive power from the power transmitting device 200 in a contactless manner, and is configured to receive power from the power transmitting device 200 in a contactless manner.
- the unit 110 includes a communication unit 160 that transmits information on the magnetic flux distribution of the power receiving unit at the time of power reception to the power transmission device.
- the information is used for determining whether or not the power transmission device 200 transmits power to the non-contact power reception device (vehicle 100).
- the communication unit 160 transmits information before the power reception unit 110 starts to receive power from the power transmission device 200.
- the information includes information on a structure of a part constituting the power receiving unit or a parameter of the power receiving unit that affects a magnetic flux distribution to be generated in the power receiving unit 110 during power reception.
- the structure of the component includes, for example, a coil type such as a center type, a both-end type, a front and rear type, and a left and right type.
- the information regarding the parameters of the power receiving unit includes, for example, a parameter indicating the magnetic flux distribution assumed by the power receiving unit during charging.
- the power receiving device (vehicle 100) shown in FIGS. 7, 8, 24 to 26, and 31 is a non-contact power receiving device that can receive power from the power transmitting device 200 in a non-contact manner.
- the power receiving unit 110AB is configured to be capable of receiving power by contact, and an adjusting device (switching units 502 to 506) capable of adjusting a magnetic flux distribution suitable for the power receiving unit during power reception.
- the non-contact power receiving device is information related to the power transmission device 200 so that the magnetic flux distribution suitable for the power receiving unit 110AB at the time of power reception becomes the magnetic flux distribution suitable for the power transmission device 200.
- a control unit vehicle ECU 300 for controlling the adjustment device based on the control.
- the contactless power transmission / reception system shown in FIGS. 7, 8, and 18 includes a power reception device (vehicle 100) and a power transmission device 200 that can transmit power to the power reception device in a contactless manner.
- the power transmission device 200 includes a power transmission unit 220 configured to be able to transmit power to the power reception device (vehicle 100) in a non-contact manner, and a communication unit 230 that transmits information on the magnetic flux distribution of the power transmission unit during power transmission to the power reception device.
- the 7, 8, and 16 include a power transmission device 200 and a power receiving device (vehicle 100) that can receive power from the power transmission device 200 in a contactless manner.
- the power receiving device includes a power receiving unit 110 configured to be able to receive power from the power transmitting device 200 in a non-contact manner, and a communication unit 160 that transmits information regarding the magnetic flux distribution of the power receiving unit during power reception to the power transmitting device 200.
- the charging operation is started to determine what type of coil type the power transmission device can handle. You can know before. Further, the vehicle can know the information without going to the charging place.
- the vehicle can communicate with a plurality of power transmission devices, and selectively or emphasize the positions of the power transmission devices that can be used in the host vehicle to be displayed on the navigation device.
- a similar display may be performed by communicating with an information center in which such information is registered.
Abstract
Description
図1は、非接触送受電システムの一例を示す全体ブロック図である。車両100は、駆動源として回転電機を用いる電気自動車が例示されるが、非接触で受電するものであれば、他の自動車であってもよいし、さらに、受電対象は車両でなくてもよい。
図2を参照して、この共鳴法では、2つの音叉が共鳴するのと同様に、同じ固有振動数を有する2つのLC共振コイルが電磁場(近接場)において共鳴することによって、一方のコイルから他方のコイルへ電磁場を介して電力が伝送される。
f2=1/{2π(Lr×C2)1/2}・・・(2)
図4は、送電部93および受電部96の固有周波数のズレと、電力伝送効率との関係を示した図である。図4においては、インダクタンスLrおよびキャパシタンスC1,C2を固定して、インダクタンスLtのみを変化させた場合が示されている。
図4からも明らかなように、固有周波数のズレ(%)が±0%の場合には、電力伝送効率は、100%近くとなる。固有周波数のズレ(%)が±5%の場合には、電力伝送効率は、40%となる。固有周波数のズレ(%)が±10%の場合には、電力伝送効率は、10%となる。固有周波数のズレ(%)が±15%の場合には、電力伝送効率は、5%となる。すなわち、固有周波数のズレ(%)の絶対値(固有周波数の差)が、受電部96の固有周波数の10%以下の範囲となるように各送電部および受電部の固有周波数を設定することで電力伝送効率を高めることができることがわかる。さらに、固有周波数のズレ(%)の絶対値が受電部96の固有周波数の5%以下となるように、各送電部および受電部の固有周波数を設定することで電力伝送効率をより高めることができることがわかる。なお、シミュレーションソフトしては、電磁界解析ソフトウェア(JMAG(登録商標):株式会社JSOL製)を採用している。
図7は、図1に示した電力送受電システム10の詳細な構成を示す回路図である。図7を参照して、車両100は、受電ユニット110および通信部160に加えて、整流器180と、充電リレー(CHR)170と、蓄電装置190と、システムメインリレー(SMR)115と、パワーコントロールユニットPCU(Power Control Unit)120と、モータジェネレータ130と、動力伝達ギヤ140と、駆動輪150と、制御装置である車両ECU(Electronic Control Unit)300と、電流センサ171と、電圧センサ172とを含む。受電ユニット110は、コイル111(以下二次自己共振コイル111といい、「共鳴コイル」などと適宜の呼び方をしてもよい)と、コンデンサ112と、二次コイル113とを含む。
図8に示すように、図7の電磁誘導コイル113,223を介在させないようにしてもよい。図8の構成では、送電装置200には送電ユニット220Kが設けられ、車両100には受電ユニット110Kが設けられる。
送電ユニット、受電ユニットのコイルタイプは代表的には、磁束が中心を通過する中心型(円型コイルタイプ:Circular Coil Type)と、磁束が一方端から他方端に抜ける両端型(Polarized Coil Type)とがある。両端型は、磁束が通過する方向が車両の前後方向であるか左右方向であるかによって、両端前後型と両端左右型とにさらに分類される。
図9を参照して、中心型のコイルユニットは、送電ユニットは送電コイル221Aを含み、受電ユニットは受電コイル111Aを含む。
図9、図10を参照して、中心型のコイルユニットは、円形のコイルの中央部分に磁束が通る。円形コイルの外形円の中心付近であって、巻線が存在せず中空となっている部分を中央部と呼ぶことにする。送電コイル221Aの中央部から受電コイル111Aの中央部に抜けた磁束は、磁性材411Aの内部を外側に向けて通過して、コイル巻線の外側を戻り、磁性材421Aの内部を中央部に向けて通過して、送電コイル221Aの中央部に戻る。送電ユニットには交流電流が流れるので、コイルに流れる電流の向きが反転すると磁束の向きも反転する。
図11を参照して、両端型のコイルユニットは、送電ユニットは送電コイル221Bを含み、受電ユニットは受電コイル111Bを含む。送電コイル221Bは、平板状の磁性材421Bに巻回される。受電コイル111Bは、平板状の磁性材411Bに巻回される。
図11、図12を参照して、両端型のコイルユニットは、磁性材に巻回されたコイルの中央部分(磁性材内部)に磁束が通る。送電コイル221Bの一方端から他方端に向けて磁性材421Bの内部を通った磁束は、受電コイル111Bの一方端に向かい、受電コイル111Bの一方端から他方端に向けて磁性材411Bの内部を通り、送電コイル221Bの一方端に戻る。送電ユニットには交流電流が流れるので、コイルに流れる電流の向きが反転すると磁束の向きも反転する。
図13を参照して、両端前後型の受電コイル111BYは、磁束の通過方向が車両の前後方向となるように車両に配置されている。言い換えれば、受電コイル111BYは、コイル巻回軸方向が車両の前後方向となるように車両に配置されている。
図14を参照して、両端左右型の受電コイル111BXは、磁束の通過方向が車両の左右方向となるように車両に配置されている。言い換えれば、受電コイル111BYは、コイル巻回軸方向が車両の左右方向となるように車両に配置されている。
図15は、実施の形態1の非接触送受電システムの動作を説明するための図である。
図18は、実施の形態1の変形例において車両と送電装置で実行される制御を説明するためのフローチャートである。
図19を参照して、車両100には中心型または両端型のコイルユニットを含む受電ユニット110が搭載される。
図20を参照して、車両100には中心型または両端型のコイルユニットを含む受電ユニット110が搭載される。
図28を参照して、送電ユニット220AB2は、十字型(cross-shaped)の磁性材421と、磁性材421に4つに分かれて巻回されたコイル221-1X,221-2X,221-1Y,221-2Yとを含む。
図30を参照して、送電装置には中心型または両端型のコイルユニットを含む送電ユニット220が搭載される。
以上説明したように、本実施の形態によれば、車両と送電装置との間で通信することによって、どのようなコイルタイプのユニットに送電装置が対応可能であるかを、充電動作を開始する前に知ることができる。また充電場所に行かなくても車両は、その情報を知ることができる。
Claims (14)
- 受電装置(100)に非接触で送電することが可能な非接触送電装置であって、
前記受電装置に非接触で送電可能に構成された送電ユニット(220)と、
送電時の前記送電ユニットの磁束分布に関する情報を前記受電装置に送信する通信部(230)とを備える、非接触送電装置。 - 前記情報は、前記受電装置が前記非接触送電装置から受電を行なうか否かの判断をするために用いられる、請求項1に記載の非接触送電装置。
- 前記通信部は、前記送電ユニットが前記受電装置に送電を開始する前に、前記情報を送信する、請求項2に記載の非接触送電装置。
- 前記情報は、送電時に前記送電ユニットに生じる磁束分布に影響する前記送電ユニットを構成する部品の構造または前記送電ユニットのパラメータに関する情報を含む、請求項1に記載の非接触送電装置。
- 受電装置に非接触で送電することが可能な送電装置であって、
前記受電装置に非接触で送電可能に構成された送電ユニット(220)と、
送電時の前記送電ユニットの磁束分布を調整可能な調整装置(502~506)とを備える、非接触送電装置。 - 送電時の前記送電ユニットの磁束分布が前記受電装置に適合する磁束分布となるように、前記受電装置に関する情報に基づいて前記調整装置を制御する制御部(240)をさらに備える、請求項5に記載の非接触送電装置。
- 送電装置(200)から非接触で受電することが可能な非接触受電装置であって、
前記送電装置から非接触で受電可能に構成された受電ユニット(110)と、
受電時の前記受電ユニットの磁束分布に関する情報を前記送電装置に送信する通信部(160)とを備える、非接触受電装置。 - 前記情報は、前記送電装置が前記非接触受電装置に送電を行なうか否かの判断をするために用いられる、請求項7に記載の非接触受電装置。
- 前記通信部は、前記受電ユニットが前記送電装置からの受電を開始する前に、前記情報を送信する、請求項8に記載の非接触受電装置。
- 前記情報は、受電時に前記受電ユニットに生じるべき磁束分布に影響する前記受電ユニットを構成する部品の構造または前記受電ユニットのパラメータに関する情報を含む、請求項7に記載の非接触受電装置。
- 送電装置から非接触で受電することが可能な非接触受電装置であって、
前記送電装置から非接触で受電可能に構成された受電ユニットと、
受電時の前記受電ユニットに適する磁束分布を調整可能な調整装置とを備える、非接触受電装置。 - 受電時の前記受電ユニットに適する磁束分布が前記送電装置に適合する磁束分布となるように、前記送電装置に関する情報に基づいて前記調整装置を制御する制御部をさらに備える、請求項11に記載の非接触受電装置。
- 非接触送受電システムであって、
受電装置と、
前記受電装置に非接触で送電することが可能な送電装置とを備え、
前記送電装置は、
前記受電装置に非接触で送電可能に構成された送電ユニット(220)と、
送電時の前記送電ユニットの磁束分布に関する情報を前記受電装置に送信する通信部(230)とを含む、非接触送受電システム。 - 非接触送充電システムであって、
送電装置と、
前記送電装置(200)から非接触で受電することが可能な受電装置とを備え、
前記受電装置は、
前記送電装置から非接触で受電可能に構成された受電ユニット(110)と、
受電時の前記受電ユニットの磁束分布に関する情報を前記送電装置に送信する通信部(160)とを備える、非接触送受電システム。
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Also Published As
Publication number | Publication date |
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RU2014134198A (ru) | 2016-04-10 |
RU2596613C2 (ru) | 2016-09-10 |
EP3300212B1 (en) | 2019-04-24 |
CN104137385A (zh) | 2014-11-05 |
JP5884890B2 (ja) | 2016-03-15 |
KR20140117566A (ko) | 2014-10-07 |
NO2819272T3 (ja) | 2018-05-19 |
KR101696527B1 (ko) | 2017-01-13 |
US10411522B2 (en) | 2019-09-10 |
IN2014DN06725A (ja) | 2015-05-22 |
EP2819272B1 (en) | 2017-12-20 |
EP3300212A1 (en) | 2018-03-28 |
CN104137385B (zh) | 2017-12-12 |
JPWO2013124977A1 (ja) | 2015-05-21 |
EP2819272A4 (en) | 2016-03-09 |
US20150015084A1 (en) | 2015-01-15 |
EP2819272A1 (en) | 2014-12-31 |
ES2731701T3 (es) | 2019-11-18 |
ES2662449T3 (es) | 2018-04-06 |
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