Electrically actuated disc stack having low response time due to

Details Electrically actuated disc stack having low response time due to Electrically actuated disc stack having low response time due to

1995-07-07

1997-02-18

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Axially engaging

192 90, 188 715, 188171, F16D 6534

Patent

active

056033958

ABSTRACT:
An integral motor-brake incorporating an electrically actuated disc stack having minimized residual magnetism. A plurality of alignment pins are provided having abutments at each end therefor for trapping therebetween the discs of the disc stacks. Residual magnetism is minimized by the following features being provided, singly or in combination: 1) A non-magnetic material is located between an armature plate and an electromagnetic coil assembly, wherein the non-magnetic material serves as a spacer to add reluctance to the magnetic circuit and may be for example a wafer for instance composed of aluminum or stainless steel or may be a coating; and 2) A driver circuit for energizing the primary and secondary electromagnetic coils, wherein the self-induced EMF produced when current is shut-off is rapidly dissipated.

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