Apparatus for controlling an AC power elevator

Details Apparatus for controlling an AC power elevator Apparatus for controlling an AC power elevator

1982-09-14

1984-06-19

Rubinson, G. Z.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

307 64, 307 82, H02J 900

Patent

active

044549300

ABSTRACT:
An apparatus for controlling an AC powered elevator by rectifying a commercial AC power source into a direct current through a rectifier, converting the direct current into a variable frequency AC power through a main inverter, driving the AC motor by the thus converted AC power to operate the cage of the elevator, and sending the regenerated electric power back to the commercial AC power source via a regeneration inverter connected to the DC side of the main inverter when regeneration braking is applied to the electric motor. If the main inverter becomes defective, the main inverter is separated from the electric motor, the AC side of the regeneration inverter is connected to the motor, and the motor is operated by relying upon the regeneration inverter.

REFERENCES:
patent: 4376471 (1983-03-01), Uchino et al.
patent: 4381457 (1983-04-01), Wiles

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