Non-contact power distribution system

  • US 5,898,579 A
  • Filed: 11/24/1997
  • Issued: 04/27/1999
  • Est. Priority Date: 05/10/1992
  • Status: Expired due to Term
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First Claim
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1. In a non-contact power distribution system for causing electric power to be transferred from a primary pathway to a vehicle on the primary pathway, wherein the primary pathway has elongated primary conductors that are part of a primary resonance circuit having an inductance and a capacitance for resonating at a primary resonant frequency, the elongated primary conductors having an inherent inductance that is a part of the inductance of the primary resonance circuit, wherein the primary resonance circuit is for generating an alternating magnetic field for being intercepted by the vehicle, wherein the vehicle is provided with at least one secondary resonant circuit for resonating at a secondary resonant frequency and an inductive coil for intercepting the magnetic field to generate an electromotive force, the improvement comprising:

  • a switching power supply for generating a high frequency primary resonant current at the primary resonant frequency; and

    means for maintaining the primary resonant frequency and the secondary resonant frequency at the same frequency when the vehicle is moving on the primary pathway.

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