US3963950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator of rotary electric machine
Assignee: Hitachi Ltd
•
Filing: 1974-10-15
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Granted: 1976-06-15
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Expires: 1994-10-15
Abstract
Abstract A stator for an electric rotary machine adopting a so called gap winding system in which the stator winding is arranged on the smooth inner surface of the stator core. The winding strand groups arranged on the inner surface of the annular stator core are fixedly secured to cooling pipes formed in a cylindrical frame, so that the cooling pipes support the winding strand groups thereby to facilitate transportation and assemblage of the stator winding on the one hand and to provide a sufficiently rugged stator winding to withstand the mechanical stress due to vibrations or electrical short-circuiting which are caused during the running of the electric rotary machine.
Inventors
- 👤 Masatoshi Watanabe
- 👤 Noriyoshi Takahashi
- 👤 Miyoshi Takahaski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:46
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/24; H02K3/46; H02K3/47; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
A stator for a rotary electric machine comprising an annular stator core, a stator winding including a plurality of fine strands and arranged at the inner surface of said stator core, and a plurality of cooling pipes in the form of a separate cylindrical frame fitted onto the inner surface of said stator core, said strands of said winding being supported by said cylindrical frame of said cooling pipes, in which said cylindrical frame of cooling pipes includes in at least double layers of cooling pipes, said strands of said winding being securely supported between said double layers of said cylindrical frame of cooling pipes, and in which said strands of said windings are disposed in winding sections, each of said sections being securely supported between respective adjacent ones of said plurality of cooling pipes in each of said double layers of said cylindrical frame.
Claim 2
Dependent Claim
145 words
A stator for a rotary electric machine comprising an annular stator core, a stator winding including a plurality of fine strands and arranged at the inner surface of said stator core, and a plurality of cooling pipes in the form of a separate cylindrical frame fitted onto the inner surface of said stator core, said strands of said winding being supported by said cylindrical frame of said cooling pipes, in which said cylindrical frame of cooling pipes includes in at least double layers of cooling pipes, said strands of said winding being securely supported between said double layers of said cylindrical frame of cooling pipes, and in which said strands of said windings are disposed in winding sections, each of said sections being securely supported between respective adjacent ones of said plurality of cooling pipes in each of said double layers of said cylindrical frame.
Claim 3
Dependent Claim
23 words
A stator for a rotary electric machine according to claim 1, in which spacers are disposed between adjacent ones of said winding sections.
References Cited (Backward Citations)
US3082337A
Cited
US3032665A
Cited
US3049634A
Cited
US3109947A
Cited
US3469126A
Cited
US3529192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |