| 摘要 |
PROBLEM TO BE SOLVED: To prevent a snubber resistor from becoming overloaded by pulling down the transient voltage applied across the resistor by providing a capacitor for suppressing transient voltage having a larger capacitance than the stray capacitance between the wiring connecting an inverter device and load to each other and the ground in parallel with a surge absorbing means. SOLUTION: A capacitor 10 for suppressing transient voltage is connected in parallel with a serial circuit composed of a snubber capacitor 41 and a snubber resistor 42. The capacitance of the capacitor 10 is made larger than stray capacitances 71, 72, and 73. Therefore, the resistor 42 is not overloaded and the overloading of the snubber means of a forward converting section can be prevented, because the voltage shared by a circuit network comprising the capacitor 41, the resistor 42, and the capacitor 10 becomes smaller. |
