Control apparatus for a.c. elevator

Details Control apparatus for a.c. elevator Control apparatus for a.c. elevator

1982-07-30

1984-10-30

Truhe, J. V.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

318757, B66B 132

Patent

active

044795653

ABSTRACT:
Described is a control device for an a.c. elevator wherein the a.c. voltage from the commercial a.c. source is rectified by a rectifier device, the thus rectified voltage is converted by an inverter into an a.c. power of variable frequency and variable phase order, and an a.c. motor is driven by this a.c. power for driving the elevator car, characterized in that electrical contacts are inserted between said a.c. source and said rectifier so as to be closed and opened at the time of start and stop of the elevator car, respectively.

REFERENCES:
patent: 4209082 (1980-06-01), Anzai et al.
patent: 4227138 (1980-10-01), Espelage et al.
patent: 4319177 (1982-03-01), Kawada et al.

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