Non-contact power receiving device, non-contact power transmitting device, and non-contact power transmitting and receiving system
A power receiving device and non-contact technology, applied in the field of non-contact power receiving devices, can solve the problem of low transmission efficiency, and achieve the effect of avoiding the reduction of efficiency
Inactive Publication Date: 2018-10-30
TOYOTA JIDOSHA KK
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Problems solved by technology
[0003] However, in the magnetic resonance method, there is an optimal distance, and when the distance is too short, the transmission efficiency will decrease
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[0058] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code|symbol is attached|subjected to the same or equivalent part in a figure, and the description is not repeated.
[0059] figure 1 is an overall configuration diagram of a power transmission and reception system according to an embodiment of the present invention.
[0060] refer to figure 1 , the power transmission and reception system 10 includes a vehicle 100 and a power transmission device 200 . Vehicle 100 includes power reception unit 110 and communication unit 160 .
[0061] Power reception unit 110 is provided on the underside of the vehicle body and configured to receive electric power transmitted from power transmission unit 220 of power transmission device 200 in a non-contact manner. Specifically, power receiving unit 110 includes a self-resonant coil (also referred to as a resonant coil) to be described later, and resonate...
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The invention provides a non-contact power receiving device, a non-contact power transmitting device and a non-contact power transmitting and receiving system. The non-contact power receiving device receives electric power transmitted from the power transmitting device (200) in a non-contact manner. The power transmission device includes: a power transmission unit (220); and a power supply unit (250) that supplies AC power to the power transmission unit. The non-contact power receiving device includes: a power receiving unit (110) that receives electric power from a power transmitting unit in a non-contact manner; and electric load devices (190, 120) that use the power received by the power receiving unit. The power receiving unit is configured so that, when the power receiving unit is arranged in a position shifted from the power transmitting unit, the transmission efficiency at the power frequency of the power supply unit used for non-contact power transmission reaches optimal. Preferably, the power receiving unit is configured so that when the power transmission frequency is changed when the positions in the horizontal direction of the central axis of the power receiving unit and the central axis of the power transmitting unit are offset. The transmission efficiency exhibits a peak whose peak frequency coincides with the power frequency.
Description
technical field [0001] The invention relates to a non-contact power receiving device, a non-contact power transmission device and a non-contact power transmission and power receiving system. Background technique [0002] In recent years, energy transmission using a magnetic field resonance method has attracted attention as a technology capable of transmitting electric energy in a non-contact manner. It is known that the magnetic resonance method can transmit power even when the distance between the power transmitting unit and the power receiving unit is larger than that of the electromagnetic induction method. [0003] However, in the magnetic resonance method, there is an optimum distance, and if the distance is too short, the transmission efficiency will decrease. Japanese Patent Laid-Open No. 2011-50140 (Patent Document 1) discloses a technique in which, in the case of carrying out transmission and reception of electric power in a non-contact manner using a resonance met...
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IPC IPC(8): H02J50/12H02J50/90B60L50/16
CPCB60L7/14B60L15/2009B60L2210/30B60L2210/40B60L2220/14B60L2240/423Y02T90/14B60L2210/10B60L2240/547B60L2240/549Y02T10/70Y04S30/14Y02T10/7072B60L50/40B60L50/16B60L53/38B60L53/36B60L53/65B60L58/12H02J7/00036B60L53/126H02J50/90H02J7/00047Y02T10/64Y02T10/72Y02T90/12Y02T90/167H02J50/12Y02T90/16H01F38/14
Inventor 市川真士堀内学
Owner TOYOTA JIDOSHA KK