WO2013132702A1 - 電力伝送システムおよび送電装置 - Google Patents
電力伝送システムおよび送電装置 Download PDFInfo
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- WO2013132702A1 WO2013132702A1 PCT/JP2012/079919 JP2012079919W WO2013132702A1 WO 2013132702 A1 WO2013132702 A1 WO 2013132702A1 JP 2012079919 W JP2012079919 W JP 2012079919W WO 2013132702 A1 WO2013132702 A1 WO 2013132702A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
Definitions
- the present invention relates to a power transmission system, and more particularly to a power transmission system that transmits electric power from a power transmission apparatus to a power reception apparatus using an electric field and / or a magnetic field.
- the present invention also relates to a power transmission device, and relates to a power transmission device applied to the above-described power transmission system.
- Patent Document 1 An example of this type of power transmission system is disclosed in Patent Document 1.
- authentication information start code, manufacturer ID, product ID, rated power information, resonance characteristic information, etc.
- the power transmission device performs device authentication and adjusts the maximum transmission power so as to conform to the rated power on the power reception device side. Normal power transmission is executed after such power adjustment is completed.
- a main object of the present invention is to provide a power transmission system and a power transmission device capable of appropriately controlling power supplied to a load while simplifying a circuit configuration.
- a power transmission system includes a power transmission device including an excitation unit that excites an electric field and / or a magnetic field based on an alternating voltage, a resonance unit that exhibits a resonance frequency corresponding to a rated power, and an electric field excited by the excitation unit and A power transmission system formed by a power receiving device including a supply unit that supplies power based on a magnetic field to a load, the power transmission device holding a correspondence relationship between a plurality of resonance frequencies and a plurality of rated powers Means for detecting the resonance frequency of the resonance means by sweeping the frequency of the AC voltage, and specifying the rated power corresponding to the resonance frequency detected by the detection means with reference to the correspondence relationship held by the holding means And the rated electric power specified by the specifying means for the magnitude of the electric field and / or magnetic field excited by the excitation means. Further comprising adjusting means for adjusting along the.
- the excitation means includes a plurality of first electrodes to which an alternating voltage is applied, and the resonance means is excited by a plurality of second electrodes that are electric field-coupled to the plurality of first electrodes, and the plurality of second electrodes.
- the supply means includes a first inductor to which an AC voltage is applied, and the supply means includes a second inductor that is inductively coupled to the first inductor.
- the detecting means is measured by the measuring means among a plurality of frequencies designated by the changing means for repeatedly changing the frequency of the AC voltage, the measuring means for measuring impedance in parallel with the processing of the changing means, and the changing means. Determining means for determining the frequency corresponding to the maximum value of the impedance as the resonance frequency of the resonance means.
- the power transmission device further includes current supply means for supplying a current, and switching means for periodically switching conduction of the current supplied by the current supply means for generation of an AC voltage, and the measurement means is a current The impedance is measured with reference to the voltage at the output terminal of the supply means.
- the determining unit determines the frequency corresponding to the maximum value on the high frequency side as the resonance frequency.
- the adjusting means includes voltage adjusting means for adjusting the height of the AC voltage.
- the power transmission device further includes a generating unit that generates an AC voltage by electromagnetic induction, and the adjusting unit includes a specific adjusting unit that adjusts the electromagnetic induction characteristics of the generating unit.
- the resonance frequency of the resonance unit decreases as the rated power increases, and the correspondence relationship held by the holding unit corresponds to a relationship in which the low rated power is associated with the high frequency resonance frequency.
- a power transmission device is a power transmission device combined with a power receiving device including a resonance unit that exhibits a resonance frequency corresponding to a rated power, and a supply unit that supplies power based on an excitation electric field and / or an excitation magnetic field to a load.
- Excitation means for exciting an electric field and / or magnetic field based on an alternating voltage
- holding means for maintaining a correspondence relationship between a plurality of resonance frequencies and a plurality of rated powers, and a resonance frequency of the resonance means by sweeping the frequency of the alternating voltage Detecting means for detecting, specifying means for specifying the rated power corresponding to the resonance frequency detected by the detecting means with reference to the correspondence relationship held by the holding means, and the magnitude of the electric field and / or magnetic field excited by the exciting means
- adjusting means for adjusting the height so as to conform to the rated power specified by the specifying means.
- the resonance means provided in the power receiving device is designed to exhibit a resonance frequency corresponding to the rated power of the power receiving device. Therefore, the resonance means of the power receiving apparatus having a certain rated power shows a certain resonance frequency, and the resonance means of the power receiving apparatus having another rated power shows another resonance frequency. Such a correspondence relationship between the rated power and the resonance frequency is held in the holding means.
- the power transmission device detects the resonance frequency of the resonance means provided in the power receiving device of the coupling destination, and refers to the correspondence relationship in which the rated power corresponding to the detected resonance frequency is held by the holding means. Identify.
- the power supplied to the load can be appropriately controlled while simplifying the circuit configuration.
- FIG. 1 Example It is a block diagram which shows the structure of one Example of this invention. It is an illustration figure which shows an example of the external appearance of FIG. 1 Example. It is an illustration figure which shows an example of a structure of the table referred by the power transmission apparatus of FIG. 1 Example. It is a graph which shows an example of the change of the impedance with respect to a frequency. It is a flowchart which shows a part of operation
- a power transmission system 100 includes a power transmission device 10 having an upper surface in which power transmission electrodes E1 and E2 are embedded, and a power reception device having a lower surface in which power reception electrodes E3 and E4 are embedded. Formed by the device 30.
- the power receiving device 30 When the lower surface of the power receiving device 30 is brought close to the upper surface of the power transmitting device 10 so that the power receiving electrodes E3 and E4 face the power transmitting electrodes E1 and E2 (see FIG. 2), the power receiving device 30 is electrically coupled to the power transmitting device 10. As a result, the power of the power transmission device 10 is transmitted to the power reception device 30.
- the DC power supply 12 applies a DC voltage to the input terminal of the switch SW1 connected to one of the terminals T1 and T2.
- the terminal T1 is directly connected to the inverter 18, and the terminal T2 is connected to the inverter 18 via the resistor R1. Therefore, when the switch SW1 is connected to the terminal T1, a DC voltage is supplied to the inverter 18, and when the switch SW1 is connected to the terminal T2, the voltage dropped by the resistor R1 is supplied to the inverter 18.
- the inverter 18 is turned on during a period when the PWM signal output from the PWM generation circuit 14 is at the H level, and is turned off during a period when the PWM signal output from the PWM generation circuit 14 is at the L level. Inverter 18 is also connected to inductor L1 among inductors L1 and L2 that form transformer 20 and are inductively coupled.
- the inverter 18 when the inverter 18 is turned on / off as described above, an AC voltage is induced in each of the inductors L1 and L2.
- the number of turns of the inductor L2 is larger than the number of turns of the inductor L1
- the AC voltage induced in the inductor L2 is higher than the AC voltage induced in the inductor L1.
- the frequency and height of the AC voltage induced in each of the inductors L1 and L2 depend on the frequency and duty ratio of the PWM signal, respectively.
- AC voltage induced in the inductance L2 is applied to the power transmission electrodes E1 and E2.
- An AC voltage having a frequency that corresponds to the frequency of the applied AC voltage and a height that depends on the degree of electric field coupling is excited in the receiving electrodes E3 and E4 that are field-coupled with the power transmission electrodes E1 and E2.
- the alternating voltage thus excited is supplied to the rectifier circuit 34 via the inductors L3 and L4 that form the transformer 32 and are inductively coupled.
- the number of turns of the inductor L4 is smaller than the number of turns of the inductor L3, and the AC voltage supplied to the rectifier circuit 34 is lower than the AC voltage excited by the power receiving electrodes E3 and E4.
- the rectifier circuit 34 rectifies such an AC voltage into a DC voltage and supplies the rectified DC voltage to the load 36.
- the power receiving circuit 30 of the power transmission system 100 illustrated in FIG. 1 is provided with a parallel resonant circuit including a capacitance C and an inductor L3.
- the characteristics of the capacitance C and the inductance L3 that is, the characteristics of the power receiving electrodes E3 to E4 and the transformer 32) so that the resonance frequency Fpr shows different values depending on the rated power of the power receiving device 30. Is adjusted.
- the characteristics of the capacitance C and the inductance L3 are adjusted so that the resonance frequency Fpr is within the range of the frequencies f1 to f2, and the rated power of the power receiving device 30 is 3 W. If so, the characteristics of the capacitance C and the inductance L3 are adjusted so that the resonance frequency Fpr falls within the range of the frequencies f2 to f3.
- the characteristics of the capacitance C and the inductance L3 are adjusted so that the resonance frequency Fpr is within the frequency f3 to f4, and if the rated power of the power receiving device 30 is 7 W.
- the characteristics of the capacitance C and the inductance L3 are adjusted so that the resonance frequency Fpr falls within the range of the frequencies f4 to f5.
- Such a relationship between the resonance frequency Fpr and the rated power is registered in the table 22 provided in the power transmission device 10 as shown in FIG.
- the CPU 16 provided in the power transmitting device 10 specifies the rated power of the power receiving device 30 with reference to the table 22 when starting power feeding to the power receiving device 30 that is electric field coupled, and follows the specified rated power. Thus, the operation of the PWM generation circuit 14 is controlled.
- the CPU 16 first switches the connection destination of the switch SW1 from the terminal T1 to the terminal T2, sets the duty ratio of the PWM signal to a constant value, and sets the frequency of the PWM signal from “f1” to “f5”. Sweep.
- the PWM generation circuit 14 provides the inverter 18 with a PWM signal having the duty ratio and frequency thus defined. As a result, an AC voltage having a height and frequency depending on the duty ratio and frequency is applied to the power transmission electrodes E1 to E2, and the impedance Z is measured based on the voltage at the input terminal of the inverter 18.
- the impedance Z shows a frequency characteristic indicated by a solid line in FIG.
- the impedance Z shows a frequency characteristic indicated by a dotted line in FIG.
- the CPU 16 detects the frequency at which the measured impedance Z has a maximum value as the resonance frequency Fpr, and compares the detected frequency with the description in the table 22 to identify the rated power of the power receiving device 30.
- the rated power of 3 W is specified corresponding to the frequency characteristic indicated by the solid line in FIG. 4
- the rated power of 5 W is specified corresponding to the frequency characteristic indicated by the dotted line in FIG.
- the CPU 16 sets the frequency of the PWM signal to the resonance frequency Fpr, adjusts the duty ratio of the PWM signal so as to follow the rated power, and then returns the connection destination of the switch SW1 to the terminal T1. . Thereby, power supply to the power receiving device 30 is started.
- the CPU 16 executes processing according to the flowcharts shown in FIGS.
- a control program corresponding to this flowchart is stored in the flash memory 16m.
- step S1 the connection destination of switch SW1 is switched from terminal T1 to terminal T2, in step S3, the frequency of the PWM signal is set to “f1”, and in step S5, the duty ratio of the PWM signal is set to a constant value.
- PWM generation circuit 14 provides inverter 18 with a PWM signal having a set frequency and duty ratio.
- step S7 the impedance Z is measured based on the voltage at the input terminal of the inverter 18, and in step S9, it is determined whether or not the set frequency has reached “f5”. If the determination result is NO, the set frequency is increased by a predetermined width in step S11, and then the process returns to step S7. As a result, the frequency characteristic of the impedance Z in the range of the frequencies f1 to f5 is found.
- step S9 If the determination result of step S9 is YES, it will progress to step S13 and will detect the frequency in which the impedance Z shows the maximum value as the resonance frequency Fpr.
- step S ⁇ b> 15 the rated power of the power receiving device 30 is specified by comparing the detected frequency with the table 22.
- step S17 the frequency of the PWM signal is set to the resonance frequency Fpr, and in step S19, the duty ratio of the PWM signal is adjusted so as to conform to the rated power specified in step S15.
- the connection destination of the switch SW1 is returned to the terminal T1 in step S21, and then the process ends.
- the power receiving device 30 includes the power receiving electrodes E3 to E4 that are electric field coupled to the power transmitting electrodes E1 to E2 provided in the power transmitting device 10, and the electric field excited to the power receiving electrodes E3 to E4 by electric field coupling.
- a transformer 32 and a rectifier circuit 34 for supplying power based on
- the power receiving electrodes E3 to E4 and the transformer 32 form a parallel resonance circuit.
- the power transmission device 10 includes a transformer 20 that generates an AC voltage applied to the power transmission electrodes E1 to E2, and a table 22 in which correspondence relationships between a plurality of resonance frequencies and a plurality of rated powers are described.
- the CPU 16 of the power transmission device 10 sweeps the frequency of the PWM signal to detect the resonance frequency Fpr of the parallel resonance circuit, specifies the rated power corresponding to the detected resonance frequency Fpr with reference to the description of the table 22, and PWM Adjust the duty ratio of the signal to match the specified rated power.
- the parallel resonant circuit provided in the power receiving device 30 is designed to exhibit a resonance frequency corresponding to the rated power of the power receiving device 30. Therefore, the resonance frequency Fpr of the parallel resonance circuit provided in the power receiving device 30 having a certain rated power shows a certain value, and the resonance frequency Fpr of the parallel resonance circuit provided in another power receiving device 30 having the rated power is Other values are shown.
- the table 22 describes the correspondence between the rated power and the resonance frequency Fpr.
- the power transmission device 10 detects the resonance frequency Fpr of the parallel resonance circuit provided in the power receiving device 30 of the coupling destination, and the rated power corresponding to the detected resonance frequency Fpr is described in the table 22 Identify by referring to the relationship.
- the power supplied to the load can be appropriately controlled while simplifying the circuit configuration.
- the duty ratio of the PWM signal is adjusted in order to match the height of the AC voltage applied to the power transmission electrodes E1 to E2 with the rated power of the power receiving device 30 (see step S19).
- the four transformers 20a to 20d corresponding to 1W, 3W, 5W and 7W and switches SW2 and SW3 for controlling the connections are provided in the power transmitting apparatus 10 in place of the transformer 20 (see FIG. 7). You may make it adjust the connection of switch SW2 and SW3 so that a rated power may be met.
- step S31 for adjusting the connection between the switches SW2 and SW3 needs to be executed instead of step S19 shown in FIG. 6 (see FIG. 8).
- step S41 for adjusting the connection of the switch SW4 needs to be executed instead of step S19 shown in FIG. 6 (see FIG. 10).
- the present invention can also be applied to the inductive coupling type power transmission system shown in FIG.
- the capacitor C11 and the inductor L11 are connected in series to the inverter 18, the inductor L12 and the capacitor C12 are connected in parallel to the rectifier circuit 34, and the alternating voltage is transmitted via the inductors L11 and L12.
- the resonance frequency Fpr of the power receiving device 30 is adjusted in the range of frequencies f1 to f2 corresponding to the rated power of 1 W, and the frequency f2 corresponding to the rated power of 3 W. Is adjusted in the range of f3, adjusted in the range of frequencies f3 to f4 corresponding to the rated power of 5 W, and adjusted in the range of frequencies f4 to f5 corresponding to the rated power of 7 W. Further, the correspondence relationship between the resonance frequency Fpr and the rated power is registered in the table 22 provided in the power transmission device 10 (see FIG. 3).
- the frequency characteristics of the power receiving device 30 are adjusted so that the resonance frequency Fpr decreases as the rated power of the power receiving device 30 increases, and the correspondence relationship between the resonance frequency Fpr and the rated power is registered in the table 22. You may do it.
- the resonance frequency Fpr of the power receiving device 30 is adjusted in the range of frequencies f1 to f2 corresponding to the rated power of 7 W, adjusted in the range of frequencies f2 to f3 corresponding to the rated power of 5 W, and 3 W
- the frequency is adjusted in the range of frequencies f3 to f4 corresponding to the rated power, and is adjusted in the range of frequencies f4 to f5 corresponding to the rated power of 1 W.
- the correspondence shown in FIG. 12 is registered in the table 22. According to FIG.
- the table 22 shown in FIG. 12 is adopted, and the frequency characteristic of the power receiving device 30 is adjusted so as to correspond to this. As a result, it is possible to prevent the power receiving device 30 from being destroyed due to erroneous detection of the rated power.
- step S1301 a maximum value, that is, a maximum impedance is detected from the impedance Z measured by the processing in steps S3 to S13, and the number of detected maximum impedances is set in a variable CNT.
- step S1303 it is determined whether or not the variable CNT exceeds “1”. If the determination result is YES, the process proceeds directly to step S1305, whereas if the determination result is NO, the process proceeds to step S1307.
- step S1305 the maximum impedance on the highest side is designated from the detected plurality of maximum impedances.
- step S1307 the detected maximum impedance is specified.
- the process of step S1305 or S1307 the process proceeds to step S1309, and the frequency corresponding to the specified maximum impedance is detected as the resonance frequency Fpr.
- the process returns to the upper hierarchy routine.
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Abstract
Description
[数1]
Fpr=1/(2π√(L3*C)
Fpr:並列共振回路の共振周波数
14 …PWM発生回路
16 …CPU
18 …インバータ
20,32 …トランス
22 …テーブル
34 …整流回路
E1~E2 …送電電極
E3~E4 …受電電極
Claims (9)
- 交流電圧に基づいて電界および/または磁界を励起する励起手段を備える送電装置と、定格電力に対応する共振周波数を示す共振手段、および前記励起手段によって励起された電界および/または磁界に基づく電力を負荷に供給する供給手段を備える受電装置とによって形成された電力伝送システムであって、
前記送電装置は、
複数の共振周波数と複数の定格電力との対応関係を保持する保持手段、
前記交流電圧の周波数を掃引して前記共振手段の共振周波数を検出する検出手段、
前記検出手段によって検出された共振周波数に対応する定格電力を前記保持手段によって保持された対応関係を参照して特定する特定手段、および
前記励起手段によって励起される電界および/または磁界の大きさを前記特定手段によって特定された定格電力に沿うように調整する調整手段をさらに備える、電力伝送システム。 - 前記励起手段は前記交流電圧が印加される複数の第1電極を含み、
前記共振手段は、前記複数の第1電極と電界結合される複数の第2電極、および前記複数の第2電極に励起された交流電圧が印加される第1インダクタを含み、
前記供給手段は前記第1インダクタと誘導結合される第2インダクタを含む、請求項1記載の電力伝送システム。 - 前記送電装置は、前記交流電圧を昇圧するトランスを有し、
前記検出手段は、前記交流電圧の周波数を繰り返し変更する変更手段、前記変更手段の処理と並列して前記トランスのインピーダンスを測定する測定手段、および前記変更手段によって指定された複数の周波数のうち前記測定手段によって測定されたインピーダンスの極大値に対応する周波数を前記共振手段の共振周波数として決定する決定手段を含む、請求項1または2記載の電力伝送システム。 - 前記送電装置は、電流を供給する電流供給手段、および前記電流供給手段によって供給された電流の導通を前記交流電圧の生成のために周期的に切り換える切り換え手段をさらに備え、
前記測定手段は前記電流供給手段の出力端の電圧を参照して前記インピーダンスを測定する、請求項3記載の電力伝送システム。 - 前記決定手段は前記測定手段によって測定されたインピーダンスが複数の極大値を有するとき高域側の極大値に対応する周波数を前記共振周波数として決定する、請求項3または4記載の電力伝送システム。
- 前記調整手段は前記交流電圧の高さを調整する電圧調整手段を含む、請求項1ないし5のいずれかに記載の電力伝送システム。
- 前記送電装置は電磁誘導によって前記交流電圧を生成する生成手段をさらに備え、
前記調整手段は前記生成手段の電磁誘導特性を調整する特定調整手段を含む、請求項1ないし5のいずれかに記載の電力伝送システム。 - 前記共振手段の共振周波数は前記定格電力の増大に応じて減少し、
前記保持手段によって保持された対応関係は高域共振周波数に低定格電力が対応付けられる関係に相当する、請求項1ないし7のいずれかに記載の電力伝送システム。 - 定格電力に対応する共振周波数を示す共振手段、および励起電界および/または励起磁界に基づく電力を負荷に供給する供給手段を備える受電装置と結合される送電装置であって、
交流電圧に基づいて電界および/または磁界を励起する励起手段、
複数の共振周波数と複数の定格電力との対応関係を保持する保持手段、
前記交流電圧の周波数を掃引して前記共振手段の共振周波数を検出する検出手段、
前記検出手段によって検出された共振周波数に対応する定格電力を前記保持手段によって保持された対応関係を参照して特定する特定手段、および
前記励起手段によって励起される電界および/または磁界の大きさを前記特定手段によって特定された定格電力に沿うように調整する調整手段を備える、送電装置。
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CN201290001176.3U CN204068434U (zh) | 2012-03-07 | 2012-11-19 | 电力传输系统以及输电装置 |
JP2014503419A JP5614510B2 (ja) | 2012-03-07 | 2012-11-19 | 電力伝送システムおよび送電装置 |
US14/463,842 US20140354075A1 (en) | 2012-03-07 | 2014-08-20 | Electric power transmission system and power transmission device |
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Cited By (3)
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WO2015072374A1 (ja) * | 2013-11-13 | 2015-05-21 | 株式会社村田製作所 | 周波数特性測定方法 |
CN106068607A (zh) * | 2014-02-12 | 2016-11-02 | 飞利浦灯具控股公司 | 包括led阵列的光照系统 |
WO2020039594A1 (ja) * | 2018-08-24 | 2020-02-27 | トヨタ自動車東日本株式会社 | 電力伝送装置 |
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CN204721100U (zh) * | 2012-12-28 | 2015-10-21 | 株式会社村田制作所 | 电力输送系统 |
CN113358912B (zh) * | 2021-06-11 | 2022-03-08 | 南方电网数字电网研究院有限公司 | 电压测量装置、电压测量方法和存储介质 |
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JP2008206233A (ja) * | 2007-02-16 | 2008-09-04 | Seiko Epson Corp | 送電制御装置、受電制御装置、無接点電力伝送システム、送電装置、受電装置および電子機器 |
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- 2012-11-19 JP JP2014503419A patent/JP5614510B2/ja not_active Expired - Fee Related
- 2012-11-19 WO PCT/JP2012/079919 patent/WO2013132702A1/ja active Application Filing
- 2012-11-19 CN CN201290001176.3U patent/CN204068434U/zh not_active Expired - Lifetime
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2014
- 2014-08-20 US US14/463,842 patent/US20140354075A1/en not_active Abandoned
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JP2008206233A (ja) * | 2007-02-16 | 2008-09-04 | Seiko Epson Corp | 送電制御装置、受電制御装置、無接点電力伝送システム、送電装置、受電装置および電子機器 |
JP2010022076A (ja) * | 2008-07-08 | 2010-01-28 | Mitsumi Electric Co Ltd | 無接点電力伝送装置 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015072374A1 (ja) * | 2013-11-13 | 2015-05-21 | 株式会社村田製作所 | 周波数特性測定方法 |
JPWO2015072374A1 (ja) * | 2013-11-13 | 2017-03-16 | 株式会社村田製作所 | 周波数特性測定方法 |
US10018659B2 (en) | 2013-11-13 | 2018-07-10 | Murata Manufacturing Co., Ltd. | Frequency characteristic measurement method |
CN106068607A (zh) * | 2014-02-12 | 2016-11-02 | 飞利浦灯具控股公司 | 包括led阵列的光照系统 |
WO2020039594A1 (ja) * | 2018-08-24 | 2020-02-27 | トヨタ自動車東日本株式会社 | 電力伝送装置 |
JPWO2020039594A1 (ja) * | 2018-08-24 | 2021-08-10 | トヨタ自動車東日本株式会社 | 電力伝送装置 |
JP7116288B2 (ja) | 2018-08-24 | 2022-08-10 | 弘 櫻庭 | 電力伝送装置 |
Also Published As
Publication number | Publication date |
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CN204068434U (zh) | 2014-12-31 |
US20140354075A1 (en) | 2014-12-04 |
JP5614510B2 (ja) | 2014-10-29 |
JPWO2013132702A1 (ja) | 2015-07-30 |
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