US3866104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Five phase stepping motor
Assignee: Gerhard Berger GmbH and Co KG Fabrik Elektrisher Gerate
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Filing: 1973-07-16
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Granted: 1975-02-11
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Expires: 1993-07-16
Abstract
Abstract In the homopolar five phase stepping motor disclosed, five stator windings are distributed on u groups each having five main poles and coacting with a permanent magnet rotor. Each pole has n+1 pole teeth. The five stator windings are connected in series to form a loop having five connecting points. A control switches five transfer switches having an armature connected to a connecting point, between a positive and negative potential so as simultaneously to energize four windings and short-circuit the fifth. The control means then shifts the short-circuited condition to other windings in cyclical sequence while energizing the remaining four windings at any time. The pole divisions exhibit the relationships
Inventors
- 👤 Gunter Heine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:32
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/22; H02K; H02K37/00; H02K37/02; H02K37/04; H02K37/10; H02K37/12; H02K37/14; H02K37/18
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
215 words
A five phase stepping motor system, comprising a stepping motor having five untapped stator windings connected said stator windings forming a plurality of connecting points, a permanent magnet rotor, control means connected to said five connecting points for energizing said windings, said stepping motor including u groups each having five main poles, each of said main poles having n + 1 pole teeth, said stator windings being distributed on said groups and poles, said poles being divided in accordance with the relations Tau p n Tau z + Alpha i Alpha Tau z(K + 0.6) Tau p'' n Tau z + Beta i Beta Tau z(K'' + 0.6), the ratio of rotor tooth widths to stator tooth widths at the outer diameter of the rotor being equal to or smaller than unity, the number of rotor teeth Tr corresponding to the relationship Tr u(5n +4K + K'' + 3), where Tau p is the pitch of adjacent main poles, Tau z is the pitch of adjacent pole teeth, Alpha is the angle between adjacent pole teeth on adjacent poles, Tau p'' is the pitch between adjacent poles on adjacent groups, Beta is the angle between adjacent pole teeth on adjacent groups and n, K, and K'' are whole numbers equal to or greater than 0.
Claim 2
Dependent Claim
215 words
A five phase stepping motor system, comprising a stepping motor having five untapped stator windings connected said stator windings forming a plurality of connecting points, a permanent magnet rotor, control means connected to said five connecting points for energizing said windings, said stepping motor including u groups each having five main poles, each of said main poles having n + 1 pole teeth, said stator windings being distributed on said groups and poles, said poles being divided in accordance with the relations Tau p n Tau z + Alpha i Alpha Tau z(K + 0.6) Tau p'' n Tau z + Beta i Beta Tau z(K'' + 0.6), the ratio of rotor tooth widths to stator tooth widths at the outer diameter of the rotor being equal to or smaller than unity, the number of rotor teeth Tr corresponding to the relationship Tr u(5n +4K + K'' + 3), where Tau p is the pitch of adjacent main poles, Tau z is the pitch of adjacent pole teeth, Alpha is the angle between adjacent pole teeth on adjacent poles, Tau p'' is the pitch between adjacent poles on adjacent groups, Beta is the angle between adjacent pole teeth on adjacent groups and n, K, and K'' are whole numbers equal to or greater than 0.
Claim 3
Dependent Claim
43 words
A motor as in claim 1, wherein said control means short-circuits one of said windings while energizing the others of said windings simultaneously and shifts the short-circuited winding in succession from winding to winding while simultaneously energizing the remaining ones of said windings.
Claim 4
Dependent Claim
20 words
A motor as in claim 1, wherein said control means include means for connecting said winding in a pentagonal loop.
Claim 5
Dependent Claim
20 words
A motor as in claim 2, wherein said control means include means for connecting said winding in a pentagonal loop.
Claim 6
Dependent Claim
23 words
A motor as in claim 1, wherein said control means connects the stator winding so that the main poles always exhibit alternating polarity.
Claim 7
Dependent Claim
23 words
A motor as in claim 2, wherein said control means connects the stator winding so that the main poles always exhibit alternating polarity.
Claim 8
Dependent Claim
23 words
A motor as in claim 3, wherein said control means connects the stator winding so that the main poles always exhibit alternating polarity.
Claim 9
Dependent Claim
44 words
A motor as in claim 1, wherein said control means energizes each of said windings so that two of successive ones of said windings have current flowing in the same direction while the remainder of the successive windings have currents flowing in opposite directions.
Claim 10
Dependent Claim
35 words
A motor as in claim 1, wherein said control means connects the windings so that, independent of the switching position, two adjacent main poles always have the same polarity while the others, have alternating polarities.
Claim 11
Dependent Claim
37 words
A motor as in claim 1, wherein said pole teeth have trapezoidal shapes, the ratio of tooth width to tooth gap at the outer diameter of the rotor being 1:2 and at the tooth root about 2:1.
Claim 12
Dependent Claim
37 words
A motor as in claim 3, wherein said pole teeth have trapezoidal shapes, the ratio of tooth width to tooth gap at the outer diameter of the rotor being 1:2 and at the tooth root about 2:1.
Claim 13
Dependent Claim
26 words
A motor as in claim 1, wherein each main pole has n + 1 pole teeth, the ratio of stator to rotor tooth width being 2:1.
Claim 14
Dependent Claim
26 words
A motor as in claim 3, wherein each main pole has n + 1 pole teeth, the ratio of stator to rotor tooth width being 2:1.
Claim 15
Dependent Claim
21 words
A motor as in claim 1, wherein said control means can switch the individual windings in series connection and parallel connection.
Claim 16
Dependent Claim
12 words
A motor as in claim 1, wherein Tau p Tau p .
Claim 17
Dependent Claim
12 words
A motor as in claim 3, wherein Tau p Tau p .
Claim 18
Dependent Claim
12 words
A motor as in claim 4, wherein Tau p Tau p .
Claim 19
Dependent Claim
20 words
A motor as in claim 1, wherein Alpha Beta and at least one of said main poles has tooth gaps.
Claim 20
Dependent Claim
20 words
A motor as in claim 3, wherein Alpha Beta and at least one of said main poles has tooth gaps.
Claim 21
Dependent Claim
20 words
A motor as in claim 14, wherein Alpha Beta and at least one of said main poles has tooth gaps.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |