Flux compensated rotational position detector and operating...

Details Flux compensated rotational position detector and operating... Flux compensated rotational position detector and operating...

2006-03-07

2006-03-07

Patidar, Jay (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207250, C324S207170, C310S06800R, C318S653000

Reexamination Certificate

active

07009385

ABSTRACT:
A flux compensated rotational position detector includes a rotating element having a plurality of magnetic poles extending over its entire periphery, and a fixed element having a plurality of protruding fixed-element magnetic poles with fixed-element magnetic pole teeth opposing the rotating element, and first and second compensating poles disposed on either side of the fixed-element magnetic poles, the first and second compensating poles having respective first and second magnetic pole teeth opposing the rotating element, wherein the fixed element does not form a closed magnetic path around the entire periphery of the rotating element, magnetizing windings are provided on all of the first and second compensating poles and the fixed-element magnetic poles, and sine output and cosine output windings are provided on each of the fixed element magnetic poles. Methods for operating the detector are also described.

REFERENCES:
patent: 3501664 (1970-03-01), Veillette
patent: 3679953 (1972-07-01), Bedford
patent: 3705343 (1972-12-01), Ringland et al.
patent: 4631510 (1986-12-01), Nagarkatti et al.
patent: 4794511 (1988-12-01), Lundin
patent: 5025201 (1991-06-01), Berger
patent: 5444368 (1995-08-01), Horber
patent: 2004/0007926 (2004-01-01), Tsukada
patent: 5-252711 (1993-09-01), None
patent: WO 02/25216 (2001-09-01), None
patent: 2002-168652 (2002-06-01), None

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