Electrical generator or motor structure – Dynamoelectric – Linear
Patent
1989-11-13
1991-10-08
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Linear
310 23, 310 12, 335253, H02K 4100
Patent
active
050557254
ABSTRACT:
A linear motor provides stepwise, incremental advance of a movable member. A linear motor includes an electric coil surrounded by a magnetic core. A co-axially aligned magnetic movable pole member and a magnetic plunger extend through the core and coil. Opposed faces of the movable pole member and the plunger are separated by an air gap. A biasing spring is connected between the plunger and the pole member to bias the pole member away from the plunger when electric current has been removed from the coil to re-establish the air gap between the pole member and the plunger. Latches act on the pole member and the plunger to provide unidirectional movement of the pole member and plunger when a magnetic field induced in the core when current is applied to the coil causes advance of the plunger into contact with the pole member. When current is removed from the coil, the magnetic field collapses and the biasing spring urges the pole member away from the plunger to re-establish the air gap for the next sequential energization of the coil. A latch release device is provided to release the latches and enable the pole member and the plunger to be retracted to a start position. In one embodiment, pairs of latches are associated in an opposite orientation with each of the pole member and the plunger. A latch control mechanism switches the latches between positions to provide bi-directional, incremental advance over the pole member and the plunger in opposite directions.
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Jones Judson H.
Stephan Steven L.
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