US3919576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric D-C vehicle motor
Assignee: Robert Bosch GmbH
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Filing: 1974-02-11
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Granted: 1975-11-11
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Expires: 1994-02-11
Abstract
Abstract To permit light-weight construction with maximum efficiency, the d-c motor is a separately excited six-pole motor having a stepped, or split wave armature winding which is precisely symmetrically arranged on the armature, the armature itself forming a lamination package located on an armature carrier, for example of light-weight metal, for instance of aluminum, in wheel-type arrangement. The armature conductors are superimposed flat strips, the conductors of different windings being located adjacent each other in the armature slots, outer conductors of the armature being welded together, and, in turn, brazed or hardsoldered to the bottom conductor, and then to the commutator, to permit assembly without damage to surrounding insulation.
Inventors
- 👤 Hans Reinbeck
- 👤 Karl-Hubert Stracke
- 👤 Alfred Collmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:27
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/40; H02K13/00; H02K13/04; H02K23/26; H02K23/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
Light-weight electric d-c vehicle motor comprising a separately excited salient field pole stator and a rotor with slots in the magnetic circuit thereof a wave-type armature winding in the rotor slots, a commutator and light-weight structural support elements (100, 101) including end bells (100, 101), wherein the motor is a six-pole motor; the winding is an exactly symmetrical armature stepped wave winding; one side of the armature winding coil is located in a slot adjacent the other side of another coil of the winding to provide for said exactly symmetrical armature winding; the field pole has a non-uniform contour facing the air gap over its arcuate length, and is wider at the terminal ends of the field pole than at the center of the field pole, thus causing voltages between the commutator segments to be of a substantially uniform voltage potential over the circumference of the commutator; the armature winding includes at least three stacked, superimposed individual flat conductor strips electrically and mechanically joined together and the bottom strip thereof is secured to a connection flag of the commutator element.
Claim 2
Dependent Claim
180 words
Light-weight electric d-c vehicle motor comprising a separately excited salient field pole stator and a rotor with slots in the magnetic circuit thereof a wave-type armature winding in the rotor slots, a commutator and light-weight structural support elements (100, 101) including end bells (100, 101), wherein the motor is a six-pole motor; the winding is an exactly symmetrical armature stepped wave winding; one side of the armature winding coil is located in a slot adjacent the other side of another coil of the winding to provide for said exactly symmetrical armature winding; the field pole has a non-uniform contour facing the air gap over its arcuate length, and is wider at the terminal ends of the field pole than at the center of the field pole, thus causing voltages between the commutator segments to be of a substantially uniform voltage potential over the circumference of the commutator; the armature winding includes at least three stacked, superimposed individual flat conductor strips electrically and mechanically joined together and the bottom strip thereof is secured to a connection flag of the commutator element.
Claim 3
Dependent Claim
28 words
Motor according to claim 1, wherein the air gap between the stator field poles and the rotor circumference is in the order of 0,7-2 percent of rotor diameter.
Claim 4
Dependent Claim
86 words
Motor according to claim 1, wherein the field pole has a contour facing the air gap which is generated by two circles (31) symmetrical with respect to the center line (33) of the pole and passing through the motor axis, said circles having centers (32, 32'') spaced by a predetermined distance from and located at either side of said pole center line, to form said non-uniform air gap which, at the end portions of the pole will be wider than at the center of the pole.
Claim 5
Dependent Claim
20 words
Motor according to claim 1, wherein the superimposed individual conductor strips are welded together at the ends facing the commutator.
Claim 6
Dependent Claim
20 words
Motor according to claim 1, wherein the superimposed individual conductor striPs are hard-soldered together at the ends facing the commutator.
Claim 7
Dependent Claim
27 words
Motor according to claim 1, wherein the bottom conductor strip (22) is longer than the other strips (19-21), said bottom conductor being secured to the commutator (14).
Claim 8
Dependent Claim
27 words
Motor according to claim 4, wherein the ends of the superimposed conductors (19, 22) secured to the commutator have a shape in the form of ventilating elements.
Claim 9
Dependent Claim
29 words
Motor according to claim 1, further comprising a speed transducer (102, 103) located within the end bell (100) of the motor housing at the side remote from the commutator.
Claim 10
Dependent Claim
35 words
Motor according to claim 1, wherein the structural support elements further comprise an armature carrier (13) of light-weight metal secured to the motor shaft (10) and carrying the armature (17; 19-22) at its outer circumference.
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |