Power transfer system

摘要

The frequency generated by a high-frequency high-voltage generator is set to a higher one of the frequencies of two coupled modes which take place when a resonance circuit of a power transmission device and that of a power reception device are coupled to each other. For this reason, charge generated on an active electrode of the power transmission device and that generated on an active electrode of the power reception device have the same polarity, while an electric potential of a passive electrode of the power transmission device and that of a passive electrode of the power reception device have the same polarity. When the passive electrode of the power transmission device is connected to the ground, the electric potential of the passive electrode is zero V. Therefore, the electric potential of the passive electrode of the power reception device is substantially zero V.

主权项

1. A power transfer system comprising:
a power transmission device including a power transmission device side active electrode, a power transmission device side passive electrode, and a high-frequency high-voltage generator circuit configured to generate a high voltage of high frequency to the power transmission device side active electrode and the power transmission device side passive electrode; and a power reception device including a power reception device side active electrode opposed to the power transmission device side active electrode, a power reception device side passive electrode, and a high-frequency high-voltage load circuit connected between the power reception device side active electrode and the power reception device side passive electrode, wherein the high-frequency high-voltage generator circuit generates the high voltage with the high frequency being a frequency such that a phase difference between a first phase of a first electric potential difference between the power transmission device side active electrode and the power transmission device side passive electrode and a second phase of a second electric potential difference between the power reception device side active electrode and the power reception device side passive electrode has an absolute value of not less than zero degrees and less than 90 degrees.