Elevator motor control system for A.C. induction motor

Details Elevator motor control system for A.C. induction motor Elevator motor control system for A.C. induction motor

1976-02-19

1978-01-17

Schaefer, Robert K.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

318 46, B66B 130

Patent

active

040687414

ABSTRACT:
An alternating current induction motor control system suitable to employ the motor as a hoisting motor for an elevator. The motor includes a high speed winding and a low speed winding, the high speed winding being used for acceleration and the low speed winding for deceleration. The low speed winding is connected in such a way as to rotate the motor in a direction opposite to that in which the high speed winding rotated it. A motion detector is provided to prevent the elevator from moving in the opposite direction after being brought to a stop at a landing.

REFERENCES:
patent: 2982897 (1961-05-01), Eastcott
patent: 3011594 (1961-12-01), Borden
patent: 3687235 (1972-08-01), Mitsui et al.
patent: 3798519 (1974-03-01), Habisohn
patent: 3860093 (1975-01-01), Mitsui et al.

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