Speed control device for an elevator

Details Speed control device for an elevator Speed control device for an elevator

1980-04-04

1982-11-09

Skaggs, H. Grant

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

318328, B66B 100

Patent

active

043579965

ABSTRACT:
An elevator speed control device in which the cage of the elevator can be stopped at a desired floor with a high accuracy without increasing the capacity of power supply equipment to compensate for periods of low AC source voltage. A detecting circuit produces an output signal in response to the generation of a deceleration instruction signal. This signal is converted into a short duration pulse signal which is used to set the output of an integrator included in the control circuit loop to a predetermined value.

REFERENCES:
patent: 3599063 (1971-08-01), Nanai et al.
patent: 3948357 (1976-04-01), Maynard et al.
patent: 3983464 (1976-09-01), Peterson
patent: 4027745 (1977-06-01), Watanabe
patent: 4083431 (1978-04-01), Oohira et al.
patent: 4094386 (1978-06-01), Suzuki et al.
patent: 4124101 (1978-11-01), Satoh

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