外国特許コード F190009694
整理番号 (S2016-1075-N0)
掲載日 2019年1月23日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2017JP042525
国際公開番号 WO 2018150678
国際出願日 平成29年11月28日(2017.11.28)
国際公開日 平成30年8月23日(2018.8.23)
  • 特願2017-027568 (2017.2.17) JP
発明の概要(英語) The present invention stably performs highly efficient contactless power supply even when a power supply object is freely displaced in an irregular manner. A contactless power supply system 100 that supplies power in a contactless manner from a power-transmitting device 110 to a power-receiving device 120 through magnetic resonance coupling, wherein the contactless power supply system 100 is characterized by being provided with: a power-transmitting coil 112 provided to the power-transmitting device; a power-receiving coil 122 provided to the power-receiving device; a power-transmitting coil position/angle adjustment mechanism 115 that adjusts the position and relative angle of the power-transmitting coil with respect to the power-receiving coil; a detection means 125 that detects the distance from the power-transmitting coil to the power-receiving coil and the angle of inclination relative to a vertical direction; and a control unit that, on the basis of the results of detection by the detection means, adjusts the position and relative angle of the power-transmitting coil with respect to the power-receiving coil by means of the power-transmitting coil position/angle adjustment mechanism, and performs control so that the transmission efficiency from the power-transmitting device to the power-receiving device reaches a maximum value.
従来技術、競合技術の概要(英語) BACKGROUND ART
In recent years, the power supply cable from the power supply apparatus without the use of an electronic device to supply electric power to the load of the non-contact (wireless power supply system) of the non-contact power feeding system has been studied and put into practical use.In the non-contact power supply as a technique capable of, using electromagnetic induction 'an electromagnetic induction method', using the resonance phenomenon of the electromagnetic field and 'electromagnetic field resonance type', such as a laser or microwave power and the electromagnetic wave transmitted and received via the antenna and converted into the 'radio frequency' is.
The electromagnetic induction method, the most industry has been put into practical use in the art, the number of kW is possible to transmit power, can be transmitted to several cm on a short distance, the power transmission coil, and the positional displacement is generated between the power receiving coil, the coupling coefficient between coils is reduced, transmission efficiency is significantly reduced.On the other hand, electric power is supplied by radio waves, research and development stage and yet still, the number of kW is expected to be transmitted, transmission efficiency is low compared to other systems can, in addition, extremely high directivity, and the power receiving side has moved slightly, the power transmission, the power receiving device is an obstacle between a case where intervention, the disabling of the transmission has been a problem.
On the other hand, the power transmission side resonance frequency of the LC circuit, the resonance frequency of the LC circuit of the power receiving side to coincide with the power frequency electromagnetic field (magnetic field resonance coupling method) is the resonance method, transmission efficiency and coupling coefficient between coils, the resonant circuit Q value represents the sharpness of the resonance determined by the product of, on the possible transmission distance meter order, some of the coupling coefficient deteriorates due to a shift of the coil, the higher the Q value is an advantage in that it is possible to transmit.Therefore, magnetic field resonant coupling type non-contact power feeding system, research in practical use, for example, Patent Document 1 and 2 as described, the power receiving coil to the electric car equipped with the power supply and the like are applied.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • 発明者(英語)
  • HIJIKATA Wataru