US4035680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable reluctance motor
Assignee: Pont a Mousson SA
•
Filing: 1976-05-10
•
Granted: 1977-07-12
•
Expires: 1996-05-10
Abstract
Abstract The motor has a first element carrying toothed studs and windings mounted on the studs and a second element constituted by a mass of magnetic material on which second element there are formed teeth capable of effecting a relative movement with respect to the teeth of the first element, the number of teeth of the first element being different from the number of teeth of the second element so that said teeth are capable of modifying the reluctance of the magnetic circuits that they constitute respectively with said studs, in order to produce a relative movement of the two elements when the windings are supplied with a poly-phase current. The number of teeth of the two elements satisfies the following relation: |Z.sub.I - Z.sub.II | = sk in which: Z I = number of teeth of the first element including fictive teeth which may be assumed to be located between the studs; Z II = number of teeth of the second element; s = number of studs per phase of the supply; k = a submultiple of the number of phases of said supply, at the most equal to one third of the number of phases.
Inventors
- 👤 Claude Robert Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:07
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/10; H02K19/103
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
226 words
A motor device comprising in combination a source of polyphase current and a motor of the variable reluctance type, the motor comprising a fixed element and a moving element, a first of which elements carries toothed studs and windings mounted on the toothed studs and the second of which elements is constituted by a mass of magnetic material on which second element there are formed teeth capable of effecting a relative movement with respect to the teeth of the first element, the number of teeth of the first element being different from the number of teeth of the second element so that said teeth are capable of modifying the reluctance of the magnetic circuits that they constitute respectively with said studs, in order to produce a relative movement of the two elements when the windings are supplied with a poly-phase current, wherein the number of teeth of the two elements satisfies the following relation: |Z.sub.I - Z.sub.II | = sk in which: Z i = number of teeth of the first element including fictive teeth which may be assumed to be located between the studs; Z ii =number of teeth of the second element; s= number of studs per phase of the supply; k= a submultiple of the number of phases of said supply, at the most equal to one third of the number of phases.
Claim 2
Dependent Claim
226 words
A motor device comprising in combination a source of polyphase current and a motor of the variable reluctance type, the motor comprising a fixed element and a moving element, a first of which elements carries toothed studs and windings mounted on the toothed studs and the second of which elements is constituted by a mass of magnetic material on which second element there are formed teeth capable of effecting a relative movement with respect to the teeth of the first element, the number of teeth of the first element being different from the number of teeth of the second element so that said teeth are capable of modifying the reluctance of the magnetic circuits that they constitute respectively with said studs, in order to produce a relative movement of the two elements when the windings are supplied with a poly-phase current, wherein the number of teeth of the two elements satisfies the following relation: |Z.sub.I - Z.sub.II | = sk in which: Z i = number of teeth of the first element including fictive teeth which may be assumed to be located between the studs; Z ii =number of teeth of the second element; s= number of studs per phase of the supply; k= a submultiple of the number of phases of said supply, at the most equal to one third of the number of phases.
Claim 3
Dependent Claim
38 words
A device as claimed in claim 1, wherein all the windings are wound in the same direction on their respective studs so that the magnetic field generated in a given stud can close onto the two adjacent studs.
Claim 4
Dependent Claim
17 words
A device as claimed in claim 1, wherein said elements have a generally cylindrical and coaxial form.
Claim 5
Dependent Claim
21 words
A device as claimed in claim 3, wherein the first element is a stator and the second element is a rotor.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 3, wherein the first element is a rotor and the second element is a stator.
Claim 7
Dependent Claim
17 words
A device as claimed in claim 3, wherein the first element is surrounded by the second element.
Claim 8
Dependent Claim
17 words
A device as claimed in claim 3, wherein the second element is surrounded by the first element.
Claim 9
Dependent Claim
21 words
A device as claimed in claim 3, wherein said teeth are respectively formed on confronting cylindrical surfaces of the two elements.
Claim 10
Dependent Claim
21 words
A device as claimed in claim 3, wherein said teeth are respectively formed on confronting radial faces of the two elements.
Claim 11
Dependent Claim
56 words
A device as claimed in claim 9, wherein one of said elements is constructed in two parts, each of which parts carries the same number of teeth on confronting radial faces, the other of said elements being interposed between the two parts of said one element and carrying teeth on each one of its radial faces.
Claim 12
Dependent Claim
22 words
A device as claimed in claim 1, wherein the windings of the studs are connected individually in the form of a triangle.
Claim 13
Dependent Claim
22 words
A device as claimed in claim 1, wherein the windings of the studs are connected individually in the form of a star.
Claim 14
Dependent Claim
21 words
A device as claimed in claim 1, wherein the windings of the studs are connected by groups in a delta configuration.
Claim 15
Dependent Claim
21 words
A device as claimed in claim 1, wherein the windings of the studs are connected by groups in a star configuration.
Claim 16
Dependent Claim
22 words
A device as claimed in claim 1, wherein the windings connected to the same phase of said source are connected in series.
Claim 17
Dependent Claim
22 words
A device as claimed in claim 1, wherein the windings connected to the same phase of said source are connected in parallel.
Claim 18
Dependent Claim
30 words
A device as claimed in claim 1, wherein the windings connected to the same phase of said source are connected in series by groups, the groups being connected in parallel.
Claim 19
Dependent Claim
49 words
A device as claimed in claim 1, wherein the magnetic circuit of at least one of said elements is made from a material selected from the group consisting of soft iron, stacked sheet metal, sintered metal, an epoxide resin charged with particles of a magnetic metal such as iron.
Claim 20
Dependent Claim
36 words
A device as claimed in claim 1, wherein said studs are twelve in number and said windings are connected in such manner as to constitute four pairs of magnetic poles after connection to a three-phase supply.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |