Drive apparatus of a direct current linear motor having two or m

Electrical generator or motor structure – Dynamoelectric – Linear

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H02K 4102

Patent

active

058313524

ABSTRACT:
A direct current linear motor including a primary side having plural armature coils, and a secondary side having two movable tables each with a field magnet. The primary and secondary sides are disposed for relative motion, and the field magnet on each movable table is disposed in opposition to the armature coils. The field magnet on one movable table is offset in a first direction transverse to a direction of relative motion of the primary side and the secondary side, and the field magnet on the other movable table is offset in a second direction opposite the first direction. A first group of position detection devices is disposed on one side of the armature coils, and a second group of position detection devices is disposed on an opposite side of the armature coils. Each one of the position detection devices of the first group and the second group correspond to a respective one of the armature coils. For each armature coil, the position detection device of the first group is disposed proximate one corner of the armature coil and the position detection device of the second group is disposed proximate a diagonally opposite corner of the armature coil.

REFERENCES:
patent: 5023495 (1991-06-01), Ohsaka et al.
patent: 5225725 (1993-07-01), Shiraki et al.
patent: 5530303 (1996-06-01), Takei

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