Control apparatus for A.C. elevator

Details Control apparatus for A.C. elevator Control apparatus for A.C. elevator

1989-11-01

1991-01-29

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

187108, B66B 106

Patent

active

049879774

ABSTRACT:
In a control apparatus for A.C. elevator, this invention consists in comprising a current control circuit which compares a current command of a brake coil current generated by a current command generator and an actual current thereof detected by a current detector, so as to control the brake coil current, whereby a riding quality of a cage is improved. This invention further comprises a velocity control circuit which adds a bias corresponding to a load in the cage, to a reference velocity command for the cage generated by a velocity command generator, whereby the riding quality of the cage is improved still further.

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patent: 4545464 (1985-10-01), Nomura
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patent: 4815567 (1989-03-01), Ikejima
patent: 4851982 (1989-07-01), Tanahashi

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