Method and apparatus for controlling the operation of an electro

Details Method and apparatus for controlling the operation of an electro Method and apparatus for controlling the operation of an electro

1988-05-02

1990-11-13

Hix, L. T.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

123490, H01H 900

Patent

active

049706225

ABSTRACT:
A method and apparatus for controlling the operation of an electromagnet by comparing the frequency of its holding current pulses against a reference frequency and by initiating another energization cycle if a difference exceeding a predetermined value is detected.

REFERENCES:
patent: 4123729 (1978-10-01), Buetemeister
patent: 4544986 (1985-10-01), Buchl
patent: 4823825 (1989-04-01), Buchl

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