Method and apparatus for fault time operating of an elevator _

Details Method and apparatus for fault time operating of an elevator _ Method and apparatus for fault time operating of an elevator _

1984-07-03

1985-03-26

Shoop, Willim M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 29R, 307 64, 307 66, 363 37, 318801, 318802, B66B 502

Patent

active

045067660

ABSTRACT:
An elevator drive motor 1 is normally energized from an AC power source 8 via an AC-DC converter 4 and a DC-AC inverter 3. When the power source fails the elevator is braked and the inverter is supplied from an emergency battery 11 to access the nearest floor for passenger discharge. If a fault occurs in the inverter it is disconnected from the motor by opening a switch contact 15a, and the closing of a further contact 15b enables the converter to energize the motor in a "reverse function" mode from the battery.

REFERENCES:
patent: 3614461 (1971-10-01), Speer
patent: 3986098 (1976-10-01), Tamii et al.
patent: 4122516 (1978-10-01), Tokunaga
patent: 4284175 (1981-08-01), Ishii et al.
patent: 4316097 (1982-02-01), Reynolds
patent: 4331994 (1982-05-01), Wirth
patent: 4376471 (1983-03-01), Uchino et al.
patent: 4399892 (1983-08-01), Watanabe
patent: 4454930 (1984-06-01), Nomura et al.
patent: 4471855 (1984-09-01), Masami et al.

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