Linear motor

Details Linear motor Linear motor

2005-03-29

2005-03-29

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

Reexamination Certificate

active

06873066

ABSTRACT:
In a linear motor, magnetic poles on a stator (or moving element) and teeth on a moving element (or stator) face one another to form a gap. The gap-side surface of each of the magnetic poles or teeth has an external shape represented by a hyperbolic function or a reciprocal function of cosine. Thus, the cogging torque can be made lower than that of a conventional linear motor of which the magnetic poles (permanent magnets) or teeth have an external shape represented by a straight line, circular arc, parabola, or hyperbola.

REFERENCES:
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Linear-Motion Electrical Machines, E. R. Laithwaite and S. A. Nasar, Proceedings of the IEEE, vol. 58 No. 4, Apr. 1970.

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