Magnetic drive unit

Details Magnetic drive unit Magnetic drive unit

1984-07-23

1986-02-04

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Linear

310 27, H02K 4102

Patent

active

045688451

ABSTRACT:
A magnetic drive unit includes a magnetic circuit composed of a yoke and a magnet which define a magnetic gap therebetween, and a voice coil movably disposed in the magnetic gap for moving a driven member, the voice coil comprising turns formed by helically cutting a tubular conductive body, the turns being spaced at pitches which are larger within the magnetic gap and become progressively smaller in directions away from the magnetic gap. The turns are of a rectangular cross section and insulated by a mass of resin coated on their surfaces.

REFERENCES:
patent: 2917692 (1959-12-01), Dubsky et al.
patent: 3743870 (1973-07-01), Hunt

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