Electronic solenoid control apparatus and method with hall effec

Details Electronic solenoid control apparatus and method with hall effec Electronic solenoid control apparatus and method with hall effec

1994-11-14

1996-06-04

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

3242072, 324226, 32420726, 361179, 361210, 340686, G01B 714, G01N 2772, G01R 3300, H01H 4712

Patent

active

055236847

ABSTRACT:
In one aspect of the present invention, an electromagnetic actuator is disclosed. The electromagnetic actuator includes a plunger adapted to move between first and second positions, a pull coil adapted to receive electrical energy and responsively produce a high electromagnetic force causing the plunger to move from the first position to the second position, and a hold coil adapted to receive electrical energy and responsively produce a low electromagnetic force for maintaining the plunger at the second position. A sensing device is included to detect the magnetic flux density produced by the coils and responsively produce a position signal having a magnitude responsive to the position of the plunger. Advantageously, signal conditioning circuitry receives the position signal, and de-energizes the pull coil in response to the position signal indicating that the plunger is at the second position.

REFERENCES:
patent: 4434450 (1984-02-01), Gareis
patent: 4450427 (1984-05-01), Gareis
patent: 4656400 (1987-04-01), Pailthorp et al.
patent: 4659969 (1987-04-01), Stupak, Jr.
patent: 4665348 (1987-05-01), Stupak, Jr.
patent: 5032812 (1991-07-01), Banick et al.
patent: 5257014 (1993-10-01), Zimmermann
patent: 5377068 (1994-12-01), Kaylor et al.

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