Patent US5036238A successfully refreshed from Google Patents.
US5036238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor of salient-pole type rotary machine
Assignee: Mitsubishi Electric Corp
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Filing: 1990-07-11
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Granted: 1991-07-30
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Expires: 2010-07-11
Abstract
Abstract A rotor of a salient-pole type rotary machine is disclosed in which field coils are held by a coil brace disposed between adjacent magnetic poles. In addition to the coil brace, a holder provided with an elastic member is also disposed between the magnetic poles, and another elastic member is disposed between the coil brace and the said holder, whereby the said two elastic members are utilized for the fixing of the field coils and for the pressing force of the coil brace. And the whole of the coil holding mechanism is separated from a spider. This construction permits the field coils to be held in place without any great change in the holding force under any dimensional change.
Inventors
- 👤 Masaaki Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:36
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/52; H02K3/527; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/19; Y10S174/21
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A rotor of a salient-pole type rotary machine comprising: a coil brace disposed between adjacent magnetic poles through a coil brace insulator to hold field coils; a holder engaged and supported by said magnetic poles in a position above said coil brace; a coil supporting plate disposed under said field coils, said coil supporting plate being in abutment with the field coils to press and thereby support the coils between it and coil receiving portions of said magnetic poles; a mounting bolt extending through both said holder and said coil brace and engaged threadedly with said coil supporting plate; a first elastic member interposed between a lower surface of said holder and an upper surface of said coil brace; and a second elastic member interposed between a lower end of a head portion of said mounting bolt, said head portion being larger in diameter than the other portion of the mounting bolt, and an upper surface of said holder.
Claim 2
Dependent Claim
159 words
A rotor of a salient-pole type rotary machine comprising: a coil brace disposed between adjacent magnetic poles through a coil brace insulator to hold field coils; a holder engaged and supported by said magnetic poles in a position above said coil brace; a coil supporting plate disposed under said field coils, said coil supporting plate being in abutment with the field coils to press and thereby support the coils between it and coil receiving portions of said magnetic poles; a mounting bolt extending through both said holder and said coil brace and engaged threadedly with said coil supporting plate; a first elastic member interposed between a lower surface of said holder and an upper surface of said coil brace; and a second elastic member interposed between a lower end of a head portion of said mounting bolt, said head portion being larger in diameter than the other portion of the mounting bolt, and an upper surface of said holder.
Claim 3
Dependent Claim
15 words
A rotor according to claim 1, wherein said holder is formed of a non-magnetic material.
Claim 4
Dependent Claim
14 words
A rotor according to claim 2, wherein said non-magnetic material is an aluminum alloy.
Claim 5
Dependent Claim
15 words
A rotor according to claim 1, wherein said first elastic member is a coil spring.
Claim 6
Dependent Claim
20 words
A rotor according to claim 1 or claim 4, wherein said second elastic member is constituted by a synthetic rubber.
Claim 7
Dependent Claim
19 words
A rotor according to claim 1 or claim 4, wherein said second elastic member is a coned disc spring.
Claim 8
Dependent Claim
17 words
A rotor according to claim 1, wherein said first elastic member is constituted by a synthetic rubber.
Claim 9
Dependent Claim
16 words
A rotor according to claim 1, wherein said first elastic member is a coned disc spring.
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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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |