| 摘要 |
PURPOSE:To facilitate the synchronization of phase and to obtain stable rotation of a motor by providing an additional circuit at a phase delay compensating circuit. CONSTITUTION:An additional circuit Z which has resistors R5, R6, a capacitor C3 and diodes D1, D2 is inserted in parallel with a phase delay circuit W to an operational amplifier E. A phase error component can be excluded until the synchronization of the phase is completed after the motor is started by providing the additional circuit, and the circuit is operated by the frequency component. Accordingly, the synchronization of the phase can be facilitated, and the same function as that having no additional circuit Z is performed in the normal rotation time after the synchronization of the phase. |
