Controlled flux contactor

Details Controlled flux contactor Controlled flux contactor

1981-12-21

1984-02-28

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361159, H01H 4732

Patent

active

044344503

ABSTRACT:
Apparatus disclosed for regulating a substantially constant magnetic flux level in an electromagnetic contactor. In one form a flux sensing device mounted in the contactor magnetic circuit provides a linear signal indicative of the level of magnetic flux in the contactor. A linear amplifier utilizes the flux signal to regulate contactor excitation to maintain flux at a desired value. In another form digital flux sensing device switches between first and second states as the level of magnetic flux varies between first and second values. A contactor excitation circuit "chops" the contactor excitation in response to the sensing device to thereby maintain magnetic flux at a value varying between the first and second values.

REFERENCES:
patent: 2906945 (1959-09-01), Weiss
patent: 2913557 (1959-11-01), Immel et al.
patent: 3060370 (1962-10-01), Varterasian
patent: 3172020 (1965-03-01), Spinelli et al.
patent: 3482163 (1969-12-01), Peek et al.
patent: 3671814 (1972-06-01), Dick

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