Linear motor and control method thereof

Details Linear motor and control method thereof Linear motor and control method thereof

1986-01-10

1987-07-07

Duggan, Donovan F.

Electricity: motive power systems

Linear-movement motors

310 12, H02K 4100

Patent

active

046789715

ABSTRACT:
A linear motor comprises a first magnetic pole having a plurality of uneven magnetic pole teeth of magnetic material arranged longitudinally at predetermined regular intervals of length, and a second magnetic pole having a yoke and plurality of uneven magnetic pole teeth made of magnetic material opposed to the first magnetic pole with a slight gap and a coil wound on each magnetic pole tooth and the permanent magnets, in which the relative position of the first and second magnetic poles in the longitudinal direction can be varied. The longitudinal lengths of the protruded portion of the second magnetic pole are substantially equal with each other. The longitudinal length of the recessed portion of the second magnetic pole is set to about one-third of the longitudinal length of the protruded portion of the first magnetic pole. The number of the protruded portions of the first magnetic pole is set to be a multiple of two.

REFERENCES:
patent: 3904941 (1978-09-01), Matsui
IBM Tech Disclosure Bulletin, "Linear Incremental Motor", Thompson, vol. 6, No. 9, 2/64, pp. 19 & 20.

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