Elevator control system

Details Elevator control system Elevator control system

1978-07-06

1980-07-22

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

B66B 130

Patent

active

042135176

ABSTRACT:
An elevator control system includes a power source which supplies AC power to an induction motor for driving an elevator car through a first thyristor gate circuit. Another induction motor provided for braking the elevator car is connected to the power source through a second thyristor gate circuit. A tachometer generator connected to the induction motors produces an speed signal indicative of the speed of the elevator car. The speed signal is compared with a reference signal and the difference therebetween is used to control the first and second thyristor gate circuits for controlling the elevator car speed.

REFERENCES:
patent: 3687235 (1972-08-01), Mitsui et al.
patent: 4042069 (1977-08-01), Ohira et al.
patent: 4068741 (1978-01-01), Ficheux et al.

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