Elevator control apparatus

Details Elevator control apparatus Elevator control apparatus

1988-01-26

1988-09-27

Shoop, Jr., William M.

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

047735082

ABSTRACT:
An inverter, which supplies an induction motor for driving an elevator with DC power, is controlled by means of a vector control method. A rotating angular speed of the induction motor is detected from a torque component of a detected motor current. A present position of an elevator cage is calculated on the basis of the detected rotating angular speed.

REFERENCES:
patent: 4083431 (1978-04-01), Oohira et al.
patent: 4485895 (1984-12-01), Tachino et al.
patent: 4501343 (1985-02-01), Salihi
patent: 4503939 (1985-03-01), Lawrence et al.
patent: 4600088 (1986-07-01), Yonemoto
patent: 4602701 (1986-07-01), Tanahashi

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