AC Elevator control system

Details AC Elevator control system AC Elevator control system

1981-07-31

1984-04-10

Roskoski, Bernard

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 128

Patent

active

044415842

ABSTRACT:
In an AC elevator system employing a three-phase induction motor for driving an elevator car, the primary voltage supplied to the induction motor is controlled to control the motoring torque in the acceleration mode and in the rated-speed running mode, while, in the deceleration mode, a power converter unit supplies AC power of low frequency to the induction motor to apply regenerative braking.

REFERENCES:
patent: 3667016 (1972-05-01), Dunfield et al.
patent: 3710218 (1973-01-01), Roundy et al.
patent: 4227138 (1980-10-01), Espelage et al.
patent: 4292577 (1981-09-01), Cesarz et al.
patent: 4319665 (1982-03-01), Komuro et al.

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