Device for emergency operation of an elevator motor

Details Device for emergency operation of an elevator motor Device for emergency operation of an elevator motor

1996-03-20

1998-10-13

Nappi, Robert

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

318441, B66B 106, H02P 100

Patent

active

058214763

ABSTRACT:
Device (100) for rotating an elevator motor during an emergency situation, such as a power failure, comprising a d.c. supply (4) and a rotary switch (8) used as a switching device for supplying a d.c. voltage into the windings (R-S, R-T, S-T) of the elevator motor (1). The d.c. voltage (DCC+, DCC-) controlled by the rotary switch is fed by turns into each winding (R-S, R-T, S-T). In addition, the device comprises a switch (6) used to supply a voltage to the brake (3) and to short-circuit the windings.

REFERENCES:
patent: 1598268 (1926-08-01), De Coninck
patent: 2701033 (1955-02-01), Chiselbrook
patent: 3658156 (1972-04-01), Abbot
patent: 3863123 (1975-01-01), Godard et al.
patent: 4024455 (1977-05-01), Yarrow et al.
patent: 4376471 (1983-03-01), Uchino et al.

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