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Power supply system, and fixed body and movable body therefor

  • US 8,907,526 B2
  • Filed: 02/19/2010
  • Issued: 12/09/2014
  • Est. Priority Date: 02/20/2009
  • Status: Active Grant
First Claim
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1. A power supply system for supplying power from a fixed body placed in a power-supplying region, via a movable body placed in a power-consuming region, to a predetermined load,wherein the fixed body comprises:

  • a first power-transmitting electrode and second power-transmitting electrode to which AC power is supplied and are configured to be placed at a position in the neighborhood of the interface between the power-supplying region and power-consuming region; and

    an AC power supply to supply power to the first power-transmitting electrode and second power-transmitting electrode,wherein the movable body comprises;

    a first power-receiving electrode and second power-receiving electrode to be placed in a manner opposed to and not contacting the first power-transmitting electrode and second power-transmitting electrode with the interface interposed therebetween;

    a first capacitor and first coil connected to each other in parallel between the first power-receiving electrode and second power-receiving electrode,wherein, while a first coupling capacitor is formed when one of the first power-receiving electrode and second power-receiving electrode is placed in a manner opposed to the first power-transmitting electrode, a second coupling capacitor is formed when the other one of the first power-receiving electrode and second power-receiving electrode is placed in a manner opposed to the second power-transmitting electrode,wherein the AC power supply transmits power to the load via the first and second coupling capacitors under a condition that causes parallel resonance between the first capacitor and first coil.

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