Oscillating-armature motor for electric dryshavers and the like

Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control

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Details

318128, 318129, 318130, H02K 3300

Patent

active

043920926

ABSTRACT:
An oscillating-armature electric motor comprises an armature which, during operation of the motor, moves along a path of oscillatory movement that includes a substantial range of movement in which the armature poles are located remote from the stator poles. When the poles are remote from each other, the efficiency of electrical to mechanical energy conversion would be low. The stator winding is energized in dependence upon the position of the motor, to avoid wasteful electrical energy dissipation during that part of the armature swing in which the aforementioned efficiency would be low. During the part of the armature swing in which the efficiency is high, the energization is great enough to establish a range of armature movement which goes beyond the high-efficiency armature positions to predominantly comprise low-efficiency armature positions.

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patent: 3898732 (1975-08-01), Krainer

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