| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor drive circuit for valve in which a motor is accurately positioned, the structure is made compact and inexpensive, and required space can be saved. SOLUTION: This motor drive circuit comprises: a switch OLS operating at a valve opening side end; a switch SLS operating at a valve closing side end; a switching element FET1 for making short-circuit of a DC motor M when the switch OLS is in operation; a display output terminal OUT1 for outputting an opening side end signal for display when the switch OLS is in operation; a switching element FET2 for making short-circuit of the DC motor M when the switch SLS is in operation; and a display output terminal OUT 2 for outputting a closing side end signal for display when the switch SLS is in operation. |
