Harmonically graded airgap reluctance-type rotating electric res

Details Harmonically graded airgap reluctance-type rotating electric res Harmonically graded airgap reluctance-type rotating electric res

1985-09-03

1986-12-23

Grimley, Arthur T.

Inductor devices

Relatively movable core and coil

Plural relatively movable core parts

310168, H01F 2106, H02K 1924

Patent

active

046315101

ABSTRACT:
This invention relates to a harmonically graded airgap reluctance-type rotating electric resolver. The magnetic permeance of the airgap is made to vary sinusoidally. Therefore, only the fundamental wave exists, free of higher harmonics. The invention has application in numerous fields, including commutation of brushless motors and to precisely position machinery tools relative to work pieces in numerically controlled machines.

REFERENCES:
patent: 2494493 (1950-01-01), Schaevitz
patent: 3041486 (1962-06-01), Moffitt
patent: 3281655 (1966-10-01), Blasingame
patent: 3641467 (1972-02-01), Ringland et al.
patent: 3851199 (1974-11-01), Apsit et al.
patent: 4255682 (1981-03-01), Toida et al.
The Bell System Technical Journal-"Design, Performance and Application of the Vernier Resolver"-G. Kronacher, Nov. 1957, pp. 1487-1500.

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