Elevator start jerk removal

Details Elevator start jerk removal Elevator start jerk removal

1994-06-29

1995-06-13

Stephan, Steven L.

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes control for power source of drive-means

187393, B66B 144

Patent

active

054244986

ABSTRACT:
A constant bias velocity is dictated from a profile generator, while a torque value sent to an elevator drive is increased linearly until motion is detected. Then, the torque value is frozen. A normal velocity profile is started and coupled without discontinuity to the prior bias velocity dictation. In response to activation of an elevator loadweighing switch, an initial torque value is provided without boundary values stored in a table. Such static friction keeps an elevator car motionless when an elevator brake is lifted.

REFERENCES:
patent: 3847251 (1974-11-01), Maltby et al.
patent: 4337848 (1982-07-01), Kindler
patent: 4828075 (1989-05-01), Klingbeil et al.
patent: 4995478 (1991-02-01), Oshima et al.
patent: 5025896 (1991-06-01), Arabori et al.
patent: 5076399 (1991-12-01), Horbruegger et al.

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