| 摘要 |
PROBLEM TO BE SOLVED: To prevent a recovery current from flowing to a diode, and perform transmission of a target electric power more properly.SOLUTION: A switch SW is attached so as to be parallelly connected to an inductor L12 of a filter 144 removing a high frequency noise of an AC power from an invertor. In a case where a coefficient of coupling of a power transmission coil and a power reception coil is large, the switch SW is turned off, and in the case where the coefficient of coupling is small, the switch SW is turned on. Thus, a phase of an output current from the invertor is properly delayed to the output voltage, and a recovery current (short circuit current) flows to a diode by advancing a current phase, and therefore, an abnormal heat evolution or failure or the like of transmission equipment due to it can be suppressed. Since an inductance becomes too large when the coefficient of coupling is small, it can prevent a power factor from becoming deterioration or prevent the transmission of the target electric power from becoming difficult.SELECTED DRAWING: Figure 4 |
