Brake control system in elevator control apparatus

Details Brake control system in elevator control apparatus Brake control system in elevator control apparatus

1991-08-07

1993-09-21

Stephan, Steven L.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187115, 318757, H02P 304

Patent

active

052471403

ABSTRACT:
The current an inverter is used as a power source for a brake circuit. The brake circuit includes a current detector, a comparator for comparing the detected value with a dictated brake current pattern, and a switch which switches the brake current in accordance with the magnitude of the difference between the detected current value and the dictated value. The brake current is selected to smoothly increase and decrease the brake current to prevent vibration and noise.

REFERENCES:
patent: 4479565 (1984-10-01), Nomura
patent: 4503940 (1985-03-01), Watanabe
patent: 4667776 (1987-05-01), Nomura
patent: 4678980 (1987-07-01), Sugimoto et al.
patent: 4713595 (1987-12-01), Yonemoto
patent: 4749932 (1988-06-01), Yonemoto
patent: 4984659 (1991-01-01), Nomura
patent: 4987977 (1991-01-01), Nomura

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