Speed control apparatus for elevator

Details Speed control apparatus for elevator Speed control apparatus for elevator

1981-05-15

1983-02-15

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

043736106

ABSTRACT:
A speed control apparatus for an elevator wherein a current command signal for controlling the firing angle of dual thyristor converters is supplied through a filter circuit. On switching from one converter to the other pursuant to reversing the elevator direction, the filter circuit is reset to bring the current command signal momentarily to zero, after which it rises smoothly in a positive or negative direction together with the elevator motor armature current.

REFERENCES:
patent: 3741348 (1973-06-01), Caputo
patent: 3917029 (1975-11-01), Maynard
patent: 3921046 (1975-11-01), Anzai et al.
patent: 3938624 (1976-02-01), Maynard
patent: 3941214 (1976-03-01), Young et al.

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