| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there are limitations in reduction in the size and weight of a power-receiving section since heat is generated in a voltage stabilization circuit at the power-receiving section for supplying a stable voltage to a load, in a non-contact power supply unit using a separation transformer. SOLUTION: An oscillation frequency in the inverter of a non-contact power supply unit is determined by a feeder coil and a main capacitor and a subordinate capacitor (an auxiliary coil) that are connected to the feeder coil. A power- receiving coil forms a power-receiving resonance circuit with a power-receiving capacitor. When the oscillation frequency of the inverter is synchronized with the power-receiving resonance circuit, power is transmitted from the feeder coil to the power-receiving coil most efficiently. When the oscillation frequency of the inverter is detuned from the power-receiving resonance circuit, efficiency in power transmission is reduced. The oscillation frequency of the inverter is controlled, thus controlling power transmission efficiency for stabilizing an output voltage at the power-receiving section, so that the need for the conventional voltage stabilization circuit is eliminated. As a result, the size and weight of the power-receiving section are reduced.
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