Elevator speed control system

Details Elevator speed control system Elevator speed control system

1975-08-11

1977-06-07

Schaefer, Robert K.

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

040277453

ABSTRACT:
An electric generator energizes a driving motor for an elevator car. In order to control the generator field, a control circuit compares a command speed signal with a sensed speed signal of the elevator car and applies the result of the comparison to the field through a filter of electrically higher order operative to cancel out a resonance and an antiresonance frequency of a mechanical system formed of the elevator car and associated mechanical components.

REFERENCES:
patent: 3435916 (1969-04-01), Bell et al.
patent: 3743055 (1973-07-01), Hoelscher et al.
patent: 3921058 (1975-11-01), Tanaka et al.
patent: 3938624 (1976-02-01), Maynard

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