MOTOR'S OVER-CROWING PRESENT SITUATION FOR DETECTING DEVICE

摘要

The cct. for servo motor comprises an outer computer (1), an inner microprocessor (2), an I/O cct. (3), a freq. converter (4), an up/ down selector (5), an error counter (6), a D/A converter (7), an amplifier (8), a speed controller (9), an encoder (10), a speed detector (11), a position controller (11'), (+)(-) voltage comparators (12,13), (+)(-) reference voltage generators (14,15), and a signal mixer (16). When the output (a) of (7) is higher than the outputs (c,d) of (14,15), the rotation angle of a motor (M) is reduced to minimum so that the overrunning is prevented.