US4255682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipolar resolver
Assignee: Okuma Corp
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Filing: 1979-04-30
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Granted: 1981-03-10
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Expires: 1999-04-30
Abstract
Abstract A multipolar resolver is so constructed that the need of the conventionally indispensable coil on the resolver rotor is eliminated by providing a center coil on a stator, and 5n or 3n rotor poles and 4n stator poles are provided where n is a positive integer. Sine and consine coils are wound on the stator poles alternately, thus simplifying the construction of the multipolar resolver.
Inventors
- 👤 Ryuji Toida
- 👤 Yuji Sakai
- 👤 Mitsuru Ikegami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:46
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2046; G08; G08C; G08C19/00; G08C19/38; G08C19/40; H; H02; H02K; H02K24/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A multipolar resolver comprising a substantially cylindrical rotor of magnetic material with 5n rotor poles provided equidistantly on the outer periphery thereof where n is a positive integer, a stator of magnetic material with 4n stator poles proveded equidistantly along the circumference concentric with the axis of said rotor, a central coil provided on said stator along substantially the same axis as said rotor axis, and sine and cosine coils wound on said stator poles, said sine and cosine coils being wound alternately on said stator poles, said sine coils being connected in series with each other and wound in opposite directions of winding alternately, and said cosine coils being connected in series with each other and wound in opposite directions of winding alternately.
Claim 2
Dependent Claim
124 words
A multipolar resolver comprising a substantially cylindrical rotor of magnetic material with 5n rotor poles provided equidistantly on the outer periphery thereof where n is a positive integer, a stator of magnetic material with 4n stator poles proveded equidistantly along the circumference concentric with the axis of said rotor, a central coil provided on said stator along substantially the same axis as said rotor axis, and sine and cosine coils wound on said stator poles, said sine and cosine coils being wound alternately on said stator poles, said sine coils being connected in series with each other and wound in opposite directions of winding alternately, and said cosine coils being connected in series with each other and wound in opposite directions of winding alternately.
Claim 3
Dependent Claim
39 words
A multipolar resolver according to claim 1, wherein said central coil is excited, so that induced voltages representing the sine and cosine components of the rotational angle of said rotor are produced from said sine and cosine coils respectively.
Claim 4
Dependent Claim
33 words
A multipolar resolver according to claim 1, wherein said sine and cosine coils are excited, so that an induced voltage representing the rotational angle of said rotor is produced from said central coil.
Claim 5
Dependent Claim
124 words
A multipolar resolver comprising a substantially cylindrical rotor of magnetic material with 3n rotor poles provided equidistantly on the outer periphery thereof where n is a positive integer, a stator of magnetic material with 4n stator poles provided equidistantly along the circumference concentric with the axis of said rotor, a central coil provided on said stator along substantially the same axis as said rotor axis, and sine and cosine coils wound on said stator poles, said sine and cosine coils being wound alternately on said stator poles, said sine coils being connected in series with each other and wound in opposite directions of winding alternately, and said cosine coils being connected in series with each other and wound in opposite directions of winding alternately.
Claim 6
Dependent Claim
124 words
A multipolar resolver comprising a substantially cylindrical rotor of magnetic material with 3n rotor poles provided equidistantly on the outer periphery thereof where n is a positive integer, a stator of magnetic material with 4n stator poles provided equidistantly along the circumference concentric with the axis of said rotor, a central coil provided on said stator along substantially the same axis as said rotor axis, and sine and cosine coils wound on said stator poles, said sine and cosine coils being wound alternately on said stator poles, said sine coils being connected in series with each other and wound in opposite directions of winding alternately, and said cosine coils being connected in series with each other and wound in opposite directions of winding alternately.
Claim 7
Dependent Claim
39 words
A multipolar resolver according to claim 4, wherein said central coil is excited, so that induced voltages representing the sine and cosine components of the rotational angle of said rotor are produced from said sine and cosine coils respectively.
Claim 8
Dependent Claim
33 words
A multipolar resolver according to claim 4, wherein said sine and cosine coils are excited, so that an induced voltage representing the rotational angle of said rotor is produced from said central coil.
References Cited (Backward Citations)
US3281655A
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US3041486A
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US3404359A
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US3368142A
Cited
US3641467A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |