Control apparatus for A.C. elevator

Details Control apparatus for A.C. elevator Control apparatus for A.C. elevator

1987-04-01

1988-01-26

Shoop, Jr., William M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

363 37, B66B 106

Patent

active

047211881

ABSTRACT:
A control apparatus for an A.C. elevator comprises resistances connected between an A.C. power source and a converter, a detection device to detect the build-up rate of the charged voltage of a smoothing capacitor, and control means to generate a signal for closing a contact interposed between the A.C. power source and the converter, when the output of the detection device is not greater than a predetermined value. The detection and control devices are preferably provided by a microcomputer.

REFERENCES:
patent: 4454930 (1984-06-01), Nomura et al.
patent: 4471855 (1984-09-01), Nomura
patent: 4482031 (1984-11-01), Yoshida et al.
patent: 4503938 (1985-03-01), Nomura
patent: 4625159 (1986-11-01), Ikejima
patent: 4667777 (1987-05-01), Nomura

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