US3629629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical machine having salient rotor poles
Assignee: Siemens AG
•
Filing: 1970-10-13
•
Granted: 1971-12-21
•
Expires: 1990-10-13
Abstract
Abstract An electrical machine has a salient pole rotor with respective pole windings and a stack of rotor laminations disposed radially with respect to the rotor. The machine is coolable by air passing parallel to the rotor axis through interpolar gaps defined by mutually adjacent rotor poles and continuing radially over the stator laminations. The improvement provides for a plurality of deflectors for partially blocking the respective interpolar gaps at the inlet side thereof. Each of the deflectors lies in a radial plane substantially perpendicular to the rotor axis and extends across the interpolar gap defined by a pair of nextadjacent rotor poles so as to lie against the respective pole windings corresponding to the latter; these deflectors block at least the respective radially inner portions of the openings.
Inventors
- 👤 Wolfgang Liebe
- 👤 Maria Susanne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:53
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/18; H02K3/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
128 words
In an electrical machine having salient-pole rotor with respective pole windings and a stack of stator laminations disposed radially with respect to said rotor, the machine being coolable by air passing parallel to the rotor axis through interpolar gaps defined by mutually adjacent rotor poles and continuing radially over the stator laminations, the improvement which comprises a plurality of deflectors for partially blocking the respective interpolar gaps at the air inlet side thereof, each of said deflectors lying in a radial plane substantially perpendicular to the rotor axis and extending across the interpolar gap defined by a pair of next-adjacent rotor poles so as to lie against the respective pole windings corresponding to the latter, said deflectors blocking at least the respective radially inner portions of said gaps.
Claim 2
Dependent Claim
128 words
In an electrical machine having salient-pole rotor with respective pole windings and a stack of stator laminations disposed radially with respect to said rotor, the machine being coolable by air passing parallel to the rotor axis through interpolar gaps defined by mutually adjacent rotor poles and continuing radially over the stator laminations, the improvement which comprises a plurality of deflectors for partially blocking the respective interpolar gaps at the air inlet side thereof, each of said deflectors lying in a radial plane substantially perpendicular to the rotor axis and extending across the interpolar gap defined by a pair of next-adjacent rotor poles so as to lie against the respective pole windings corresponding to the latter, said deflectors blocking at least the respective radially inner portions of said gaps.
Claim 3
Dependent Claim
41 words
In an electrical machine according to claim 1, each of said pole windings having laterally projecting cooling fins said deflectors being set back in axial direction against said pole windings by an amount corresponding to the width of said cooling fins.
Claim 4
Dependent Claim
29 words
In an electrical machine according to claim 1, each of said deflectors having an upper edge at an elevation corresponding to half of the height of said rotor poles.
Claim 5
Dependent Claim
14 words
In an electrical machine according to claim 1, said deflectors consisting of nonmagnetic material.
Claim 6
Dependent Claim
30 words
In an electrical machine according to claim 1, said improvement comprising holding means at the interface of said deflectors and said rotor for removably securing said deflectors to the latter.
Claim 7
Dependent Claim
64 words
In an electrical machine according to claim 5, said improvement comprising ancillary means engageable with said holding means for adjusting said deflectors in a direction parallel to said rotor axis. 7. In an electrical machine according to claim 6, said holding means being bolts engageable with said rotor in radial direction, and said ancillary means being slots in said rotor for holding said bolts.
Claim 8
Dependent Claim
73 words
In an electrical machine according to claim 1, at least two partitions disposed in each of said gaps for blocking the lower portion thereof, said partitions being transverse to the rotor axis and extending across said gap defined by said pair of next-adjacent rotor poles so as to lie against said respective pole windings corresponding to the latter, said partitions being positioned symmetrically with respect to the perpendicular center plane of the rotor.
Claim 9
Dependent Claim
20 words
In an electrical machine according to claim 8, said partitions having an elevation corresponding to the elevation of said deflectors.
Claim 10
Dependent Claim
18 words
In an electrical machine according to claim 8, said deflectors and said partitions being made of nonmagnetic material.
Claim 11
Dependent Claim
36 words
In an electrical machine according to claim 8, said improvement comprising holding means at the interfaces of said deflectors and said partitions with said rotor for removably securing said deflectors and said partitions to the latter.
Claim 12
Dependent Claim
33 words
In an electrical machine according to claim 11, said improvement comprising ancillary means engageable with said holding means for adjusting said deflectors and said partitions in a direction parallel to said rotor axis.
Claim 13
Dependent Claim
30 words
In an electrical machine according to claim 12, said holding means comprising bolts engageable with said rotor in radial direction, and said ancillary means being dovetail slots in said rotor.
References Cited (Backward Citations)
US2271981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |