| 摘要 |
<p>PURPOSE:To obtain a drive circuit for a motor which is inexpensive and has a low voltage drop by using a semiconductor element only for a switching and a relay for the other. CONSTITUTION:When a motor M is rotatably driven in a positive direction, signals are outputted from the output terminals (1) and (4) of a control circuit C to energize a solenoid of a relay RY1 to connect a contact, and to conduct a transistor TR4. On the contrary, when the motor M is rotatably driven in a reverse direction, a signal is outputted from the output terminals (2) and (3) of the control circuit C to energize a solenoid of a relay RY3 to connect a contact, and to conduct a transistor TR3. Thus, the number of large current semiconductor elements is reduced to provide a drive circuit for the motor which has low voltage drop inexpensively.</p> |
