| 摘要 |
<P>PROBLEM TO BE SOLVED: To exhibit a function of a power switch in a converter circuit without use of an electromagnetic relay. <P>SOLUTION: A control section 300A, which controls switching of switching elements Trp, Ttp, Trn, Ttn mounted on upper and lower arms of at least two phases of a converter circuit 10A connected with a three-phase AC power supply E3 and a capacitor C and switching of an opening/closing relay 84C, controls switching of each of the switching elements Trp, Trn, Ttp, Ttn so that the opening/closing relay (84C) becomes a closing state, the upper and lower arms of one phase become a conduction state and the remaining upper and lower arms becomes a non-conduction state until an inrush current can be suppressed after starting energization to the converter circuit 10A. <P>COPYRIGHT: (C)2013,JPO&INPIT |
