发明授权
US3858100A D.c. motor speed control system through phase control and phase locking circuit 失效
直流电机速度控制系统通过相位控制和相位锁定电路

D.c. motor speed control system through phase control and phase locking circuit
摘要:
A digital phase control adjustment system is provided for a d.c. motor which finds particular utility in applications where fast start and stop operations of the motor are required. The pulses forming a reference signal and those forming a variable signal are stored sequentially in a shift register and when the shift register is alternately storing ones and zeros, the pulses of the two signals are in alternate sequence for a certain number of periods, indicating that the motor speed is near the intended value.
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