A.C. motor control

Details A.C. motor control A.C. motor control

1991-04-02

1993-12-21

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318603, G05B 102

Patent

active

052724255

ABSTRACT:
A low cost control system for precise positioning employs an a.c. motor and a variable frequency power source for the motor. When the desired position is approached, the frequency of the source is decreased to a low constant value, and the motor is stopped in timed relation to the leading edge of a feedback signal from a position responsive feedback sensor.

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