US3793548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding for electromechanical transducers with coreless rotor
Assignee: RETOBOBINA HANDELSANSTALT
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Filing: 1973-02-07
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Granted: 1974-02-19
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Expires: 1993-02-07
Abstract
Abstract An electromechanical transducer has a coreless rotor winding formed of a series of loops, each of the loops having an active portion inclined to both the axial and tangential directions of the rotor and an inactive head portion oriented perpendicular to the axial direction. The relative length of the head portion of each loop affects the electrical characteristics of the transducer, such as starting torque, time constant and efficiency. By selecting the proper relative length for the head portion, the performance characteristics of the transducer may be optimized.
Inventors
- 👤 F Faulhaber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:02
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
In an electromechanical transducer having means for generating a magnetic field and a coreless rotor adapted to rotate through said field, a winding for said rotor comprising a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the tangential direction of said rotor and an inactive winding head portion oriented generally perpendicularly to said radial direction.
Claim 2
Dependent Claim
69 words
In an electromechanical transducer having means for generating a magnetic field and a coreless rotor adapted to rotate through said field, a winding for said rotor comprising a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the tangential direction of said rotor and an inactive winding head portion oriented generally perpendicularly to said radial direction.
Claim 3
Dependent Claim
18 words
The winding according to claim 1, wherein said winding head portion is oriented generally in a tangential direction.
Claim 4
Dependent Claim
27 words
The winding according to claim 1, wherein said winding head portion has a tangential length greater than 0.4 of the tangential length of one of said loops.
Claim 5
Dependent Claim
27 words
The winding according to claim 3, wherein said winding head portion has a tangential length less than 0.7 of the tangential length of one of said loops.
Claim 6
Dependent Claim
14 words
The winding according to claim 1, wherein said loops are formed as individual loops.
Claim 7
Dependent Claim
17 words
The winding according to claim 1, wherein said loops are formed of a single length of wire.
Claim 8
Dependent Claim
86 words
In an electromechanical transducer having means for generating a magnetic field and a coreless rotor adapted to rotate through said field, a winding for said rotor comprising a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the peripheral direction of said rotor and an inactive winding head portion connected with said active portion, said winding head portion having a tangential length of between 0.4 and 0.7 of the length of said loop.
Claim 9
Dependent Claim
86 words
In an electromechanical transducer having means for generating a magnetic field and a coreless rotor adapted to rotate through said field, a winding for said rotor comprising a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the peripheral direction of said rotor and an inactive winding head portion connected with said active portion, said winding head portion having a tangential length of between 0.4 and 0.7 of the length of said loop.
Claim 10
Dependent Claim
94 words
In an electromechanical transducer having means for generating a magnetic field and a coreless rotor adapted to rotate through said field, a winding for said rotor comprising a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the peripheral direction of said rotor and an inactive winding head portion connected with said active portion, said winding head portion having a tangential length of between 0.4 and 0.7 of the distance between two points separated by 180 electrical degrees of said field.
Claim 11
Dependent Claim
94 words
In an electromechanical transducer having means for generating a magnetic field and a coreless rotor adapted to rotate through said field, a winding for said rotor comprising a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the peripheral direction of said rotor and an inactive winding head portion connected with said active portion, said winding head portion having a tangential length of between 0.4 and 0.7 of the distance between two points separated by 180 electrical degrees of said field.
Claim 12
Dependent Claim
81 words
In an electromechanical transducer having means for generating a magnetic field, the combination comprising a winding located within said field, and means for rotating said magnetic field relative to said winding, said winding having a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the tangential direction of said rotor and an inactive winding head portion, said winDing head portion being oriented generally perpendicularly to said radial direction.
Claim 13
Dependent Claim
81 words
In an electromechanical transducer having means for generating a magnetic field, the combination comprising a winding located within said field, and means for rotating said magnetic field relative to said winding, said winding having a plurality of loops, each of said loops having an active portion inclined to the axial direction of said rotor and inclined to the tangential direction of said rotor and an inactive winding head portion, said winDing head portion being oriented generally perpendicularly to said radial direction.
Claim 14
Dependent Claim
24 words
Apparatus according to claim 9, wherein said means for rotating comprises means for supporting said winding and means for rotating said field generating means.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |