Elevator control apparatus

Details Elevator control apparatus Elevator control apparatus

1989-01-26

1990-05-22

Pellinen, A. D.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187140, B66B 502

Patent

active

049280210

ABSTRACT:
An elevator control apparatus comprises a torque control device for calculating a torque command for a motor for hoisting an elevator cage, a brake which operates in response to a braking command so as to restrain the motor, a brake abnormality detector adapted to operate when a difference between a maximum value and a minimum value of the torque command is less than a predetermined value, and a brake abnormality output circuit which delivers a predetermined signal when an inferior release of the brake has been detected by the operation of the brake abnormality detector.

REFERENCES:
patent: 4465162 (1984-08-01), Yokota
patent: 4719995 (1988-01-01), Ikejima
patent: 4833380 (1989-05-01), Magee

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