Pulse motor control circuit

摘要

A pulse motor control circuit for starting up and synchronizing a sync pulse motor (for use typically in factory automation or precise machining) with an external sync signal. The control circuit applies a starting drive pulse signal to start up and drive the motor to place it in synchronism with the external signal, and then switches the drive pulse signal to the external signal for the synchronous revolution of the motor. The starting drive pulse signal has a variable frequency which is varied from a frequency in the self-starting region to that of the external sync signal.