US4011479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator construction for a permanent magnet-excited d-c machine
Assignee: Siemens AG
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Filing: 1975-12-15
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Granted: 1977-03-08
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Expires: 1995-12-15
Abstract
Abstract A permanent magnet-excited d-c machine including a stator, a plurality of flux-conducting pieces disposed in the stator, and a plurality of tangentially magnetized permanent magnets disposed in the stator between each of the flux-conducting pieces. Compensation slots are provided in the flux-conducting pieces on both sides of each of the permanent magnets and form a compensation tooth on the flux-conducting pieces between each of the slots and the permanent magnets in the stator. A winding is disposed in the slots adjacent each magnet and is looped around each magnet and each compensation tooth disposed between the compensation slots.
Inventors
- 👤 Wolfgang Volkrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:43
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/02; H02K23/22; H02K3/00; H02K3/04; H02K3/18; H02K3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
In a permanent magnet-excited d-c machine including a stator, a plurality of flux-conducting pieces disposed in said stator, and a plurality of tangentially magnetized permanent magnets disposed in said stator between each of said flux-conducting pieces, the improvement comprising compensation slots disposed in said flux-conducting pieces on both sides of each of said permanent magnets, said slots each forming a compensation tooth on said flux-conducting pieces between each of said slots and said permanent magnets, and a winding disposed in said slots adjacent each magnet and looped around each said magnet and each compensation tooth disposed between said slots, so as to form counter-ampere-turns in said pieces for compensating armature-ampere-turns in said pieces thereby providing a reversing zone for commutation in said machine.
Claim 2
Dependent Claim
123 words
In a permanent magnet-excited d-c machine including a stator, a plurality of flux-conducting pieces disposed in said stator, and a plurality of tangentially magnetized permanent magnets disposed in said stator between each of said flux-conducting pieces, the improvement comprising compensation slots disposed in said flux-conducting pieces on both sides of each of said permanent magnets, said slots each forming a compensation tooth on said flux-conducting pieces between each of said slots and said permanent magnets, and a winding disposed in said slots adjacent each magnet and looped around each said magnet and each compensation tooth disposed between said slots, so as to form counter-ampere-turns in said pieces for compensating armature-ampere-turns in said pieces thereby providing a reversing zone for commutation in said machine.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |