Dual flux path voice coil motor

Details Dual flux path voice coil motor Dual flux path voice coil motor

1988-03-14

1989-11-21

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Linear

360 7813, 310 12, H02K 4100

Patent

active

048825085

ABSTRACT:
A dual flux path linear voice coil motor (VCM) for use as a disk file linear actuator has a magnetically permeable center core which is separated by non-magnetic insert into two sections spaced apart along a longitudinal axis parallel to the VCM's linear access direction. The center core has recessed parallel flat faces equally spaced on opposite sides of the longitudinal axis which form pockets in the center core. Permanent magnets are embedded in the pockets of the center core and span the space between the center core sections. The VCM generates is essentially constant force on the coil for a constant current, regardless of coil stroke position or direction of movement.

REFERENCES:
patent: 3505544 (1970-04-01), Helms
patent: 3723780 (1973-03-01), Gillum
patent: 3889139 (1975-06-01), Hughes
patent: 4439699 (1984-03-01), Brende et al.
patent: 4456934 (1984-06-01), Wedman et al.
patent: 4462054 (1984-07-01), Dong et al.
patent: 4546277 (1985-10-01), Carbonneau et al.
patent: 4652779 (1987-03-01), Wilcox
patent: 4661729 (1987-04-01), Hames et al.
patent: 4728830 (1988-03-01), Gamble

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