| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that, in a contactless power transmission device using magnetic coupling, power transmission resonance system is damaged since a resonance state changes due to load fluctuation, and a resonance voltage in a power transmission resonance system exceeds a breakdown voltage of a component which constitutes the power transmission resonance system.SOLUTION: The contactless power transmission device of the invention copes with the load fluctuation by detecting the current flowing in the power transmission resonance system, and controlling a time point to start supply of the power of the power transmission resonance system on the basis of a time point of zero crossing of the current, so as to variably control a time period from the time point of start of supply of the power until stop of the supply of the power and to adjust the power of the power transmission side with a simple configuration.SELECTED DRAWING: Figure 1 |
