| 摘要 |
PROBLEM TO BE SOLVED: To provide a load drive circuit capable of preventing contact spark well by a simple circuit structure. SOLUTION: A single-phase A.C. type motor (load) 1 is controlled by switching of contacts 21 and 31 of a first relay 2 and a second relay 3 connected in series to each other. A solid state relay (SSR) 4 is connected in parallel to the contacts 21 and 31. The SSR 4 is turned on earlier than the contacts 21 and 31, and turned off later than them. COPYRIGHT: (C)2008,JPO&INPIT
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