| 摘要 |
<p>PURPOSE:To increase starting torque by supplying power to two-phase coils corresponding to the target rotary position of an output shaft, connecting one more phase coil to positive or negative power supply according to the rotational direction, and interrupting power supply upon elapse of predetermined time. CONSTITUTION:Four permanent magnets 3 are secured to a rotary shaft 6 thus forming a rotor, while coils 8-13 are wound in star around a stator 7 and terminals 15a-15c are connected to a power supply control circuit 101. The control circuit 101 is provided with a timer 101a and a rotational direction indicating circuit 101b. When the output from a switch 18 is switched from soft mode 18c to hard mode 18a, for example, the rotational direction indicating circuit 101b outputs a reverse rotation signal. The main power supply terminals 15a, 15b are connected with positive and negative poles and the sub-conduction terminal 15c is switched to positive pole thus rotating the rotary shaft rightward. The timer circuit 101a is turned ON simultaneously with start of power supply and turned OFF upon elapse of predetermined time thus stopping rotation.</p> |
