US3819964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutating structure for d.c.permanent magnet machines
Assignee: Kollmorgen Corp
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Filing: 1973-07-30
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Granted: 1974-06-25
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Expires: 1993-07-30
Abstract
Abstract A DC permanent magnet machine in which the functions typically attributed to the stator and rotor assemblies are reversed to provide an ''''inside out'''' design. The stator is provided with a plurality of electrically energizable poles having windings which are electrically coupled to associated commutator bars forming an annular array. Also associated with the stator are a pair of annular conductive rings. The rotor is provided with a plurality of permanent magnet poles equal in number to the poles provided in the stator. The rotor also carries a plurality of roller contacts which serve to couple the commutator bars to the conductive rings which are in turn connected to opposite polarities of the DC energizing source, thereby providing electrical power to associated coils of the stator winding.
Inventors
- 👤 S Noodleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
H; H02; H02K; H02K25/00; H02K13/00; H02K13/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
205 words
Switching apparatus for a machine responsive to a source of DC power and having interacting rotor and stator assemblies wherein at least one of said assemblies if provided with a winding having a plurality of energizeable coils, said coils having an annular array of commutator bars associated therewith for supplying electrical power thereto, and the other of said assemblies having a plurality of permanent magnets associated therewith, said apparatus comprising: a. first and second annular conductive rings associated with said assembly having said winding, said conductive rings being adapted respectively for coupling to opposite polarities of said DC source; and b. first and second roller contact means associated with the other of said assemblies whereby said contact means and said commutator bars rotate relative to each other: i. said first roller contact means being adapted to progressively and sequentially engage said commutator bars and to continuously engage said first conductive ring to momentarily couple said commutator bars to said first conductive ring; ii. said second roller contact means being displaced from said first roller contact means and adapted to progressively and sequentially engage said commutator bars and to continuously engage said second conductive ring to momentarily couple said commutator bars to said second conductive ring.
Claim 2
Dependent Claim
205 words
Switching apparatus for a machine responsive to a source of DC power and having interacting rotor and stator assemblies wherein at least one of said assemblies if provided with a winding having a plurality of energizeable coils, said coils having an annular array of commutator bars associated therewith for supplying electrical power thereto, and the other of said assemblies having a plurality of permanent magnets associated therewith, said apparatus comprising: a. first and second annular conductive rings associated with said assembly having said winding, said conductive rings being adapted respectively for coupling to opposite polarities of said DC source; and b. first and second roller contact means associated with the other of said assemblies whereby said contact means and said commutator bars rotate relative to each other: i. said first roller contact means being adapted to progressively and sequentially engage said commutator bars and to continuously engage said first conductive ring to momentarily couple said commutator bars to said first conductive ring; ii. said second roller contact means being displaced from said first roller contact means and adapted to progressively and sequentially engage said commutator bars and to continuously engage said second conductive ring to momentarily couple said commutator bars to said second conductive ring.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein said first and second roller contact means are angularly displaced from one another so as to simultaneously engage commutator bars associated with the same coil.
Claim 4
Dependent Claim
25 words
The apparatus according to claim 1 wherein said first and second conductive rings are disposed on opposite sides of said annular array of commutator Bars.
Claim 5
Dependent Claim
19 words
The apparatus of claim 3 wherein said first and second roller contact means are linearly displaced from one another.
Claim 6
Dependent Claim
43 words
The apparatus of claim 1 wherein the axes of said commutator bars are disposed at an acute angle with respect to each other so that when said first and second roller contact means engage said commutator bars they effect a make-before-break contact sequence.
Claim 7
Dependent Claim
194 words
Switching apparatus for a machine responsive to a source of DC power, said apparatus comprising: a. a stator assembly having a winding comprising a plurality of energizable coils, said coils having an annular array of commutator bars associated therewith for supplying electrical power thereto; b. a rotor assembly including permanent magnet means for creating a rotating magnetic field; c. first and second annular conductive rings associated with said stator assembly and said commutator bars, said conductive rings being adapted respectively for coupling to opposite polarities of said DC source; and d. first and second roller contact means associated with said rotor assembly whereby said roller contact means and said commutator bars rotate relative to each other: i. said first roller contact means being adapted to progressively and sequentially engage said commutator bars and to continuously engage said first conductive ring to momentarily couple said commutator bars to said first conductive ring, ii. said second roller contact means being displaced from said first roller contact means and adapted to progressively and sequentially engage said commutator bars and to continuously engage said second conductive ring to momentarily couple said commutator bars to said second conductive ring.
Claim 8
Dependent Claim
194 words
Switching apparatus for a machine responsive to a source of DC power, said apparatus comprising: a. a stator assembly having a winding comprising a plurality of energizable coils, said coils having an annular array of commutator bars associated therewith for supplying electrical power thereto; b. a rotor assembly including permanent magnet means for creating a rotating magnetic field; c. first and second annular conductive rings associated with said stator assembly and said commutator bars, said conductive rings being adapted respectively for coupling to opposite polarities of said DC source; and d. first and second roller contact means associated with said rotor assembly whereby said roller contact means and said commutator bars rotate relative to each other: i. said first roller contact means being adapted to progressively and sequentially engage said commutator bars and to continuously engage said first conductive ring to momentarily couple said commutator bars to said first conductive ring, ii. said second roller contact means being displaced from said first roller contact means and adapted to progressively and sequentially engage said commutator bars and to continuously engage said second conductive ring to momentarily couple said commutator bars to said second conductive ring.
Claim 9
Dependent Claim
17 words
Apparatus according to claim 6 wherein said roller contact means includes roller contacts comprising an electro-graphitic material.
Claim 10
Dependent Claim
12 words
Apparatus according to claim 7 wherein said electro-graphitic material is silver graphite.
Claim 11
Dependent Claim
21 words
Apparatus according to claim 6 wherein said rotor assembly includes a roller contact support assembly adapted to rotate with said rotor.
Claim 12
Dependent Claim
35 words
Apparatus according to claim 6 wherein said conductive rings are disposed on opposite sides of said annular array of commutator bars and said first and second roller contact means are linearly displaced from one another.
Claim 13
Dependent Claim
32 words
Apparatus according to claim 6 wherein said first and second roller contact means are angularly displaced from one another so as to simultaneously engage the commutator bars associated with the same coil.
Claim 14
Dependent Claim
43 words
Apparatus according to claim 6 wherein the axes of said commutator bars are disposed at an acute angle with respect to each other so that when said first and second roller contact means engage said commutator bars they effect a make-before-break contact sequence.
Claim 15
Dependent Claim
33 words
Apparatus according to claim 6 wherein said first and second roller contact means comprise tubular conductive members having first and second conductive sleeves for respectively engaging a conductive ring and said commutator bars.
Claim 16
Dependent Claim
17 words
Apparatus according to claim 13 wherein at least one of said conductive sleeves comprises an electro-graphitic material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |