| 摘要 |
PROBLEM TO BE SOLVED: To provide an induction type vehicle power feed device which can obtain higher transmission efficiency by a simple structure. SOLUTION: The tire W rotates a lever plate 34. The lever plate 34 turns an arm 32 through a shaft 33. A power transmission device 1 fixed to the tip of the arm 32 contacts with a power receiving device 2 fixed to the bottom face of a vehicle after being ascended to the bottom face of the vehicle from the surface of the ground. An oscillation circuit which feeds AC power to a primary coil of the power transmission device 1 detects a resonance frequency of a load circuit. The oscillation circuit outputs an AC voltage having a frequency equal to the detected resonance frequency. An AC voltage induced to a secondary coil is rectified by a three-phase inverter for driving a traveling motor of an electric automobile 100. A switching element of a DC-DC converter which applies a boosting voltage to the three-phase inverter adjusts a charge current fed to a battery from the three-phase inverter. COPYRIGHT: (C)2011,JPO&INPIT
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