US3579001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear motor having radial armature plates
Assignee: Merlin Gerin SA
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Filing: 1969-10-16
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Granted: 1971-05-18
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Expires: 1989-10-16
Abstract
Abstract Compact linear motor of high thrust having an annular magnetic field structure with a plurality of radially directed air gaps in which extend armature plates of the motor. The armature plates are subjected to the magnetic flux produced by the field structure resulting in axially directed forces which displace the armature with respect to the field structure.
Inventors
- 👤 Yves F Pelenc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:46
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A linear induction motor comprising an armature and a generally ring-shaped magnetic field structure relatively movable one with respect to the other, said armature comprising a plurality of radially extending fins of electrically conductive material, said magnetic field structure including a plurality of elementary multiphase wound magnetic field members extending between successive pairs of adjacent fins, respectively, to define a plurality of radially extending air gaps accommodation coextensive portions of said fins, respectively, along a major part of the radial length of said fins so that said elementary field members, when multiphase energized, produce axially moving magnetic fields in said air gaps causing axial relative movement of said armature and said magnetic field structure.
Claim 2
Dependent Claim
114 words
A linear induction motor comprising an armature and a generally ring-shaped magnetic field structure relatively movable one with respect to the other, said armature comprising a plurality of radially extending fins of electrically conductive material, said magnetic field structure including a plurality of elementary multiphase wound magnetic field members extending between successive pairs of adjacent fins, respectively, to define a plurality of radially extending air gaps accommodation coextensive portions of said fins, respectively, along a major part of the radial length of said fins so that said elementary field members, when multiphase energized, produce axially moving magnetic fields in said air gaps causing axial relative movement of said armature and said magnetic field structure.
Claim 3
Dependent Claim
19 words
A motor according to claim 1, further comprising ring-shaped peripheral support means to carry said elementary magnetic field members.
Claim 4
Dependent Claim
27 words
A motor according to claim 1, further comprising ring-shaped peripheral support means to carry said fins, and axial support means to carry said elementary magnetic field members.
Claim 5
Dependent Claim
46 words
A motor according to claim 1, said elementary magnetic field members including magnetic core means filling in a major part of the wedge-shaped space included between said fins and carrying a ring winding having active conductors extending substantially along said major part of said radial length.
Claim 6
Dependent Claim
16 words
A motor according to claim 1, said elementary magnetic field members comprising longitudinal extending cooling conduits.
Claim 7
Dependent Claim
113 words
A linear induction motor comprising an armature having a plurality of planar radially extending fins of electrically conductive material, a generally wedge-shaped multiphase wound magnetic field member between each pair of adjacent fins to define a pair of opposed pole faces facing corresponding coextensive portions of confronting inner surfaces of said pair of adjacent fins, respectively, and spaced apart a small distance therefrom, said coextensive portions having a radial length constituting a major part of the total radial length of said fins, whereby said magnetic field member, when multiphase energized, produces a magnetic field axially progressing along said pole faces to cause axial relative movement of said armature and said magnetic field member.
Claim 8
Dependent Claim
113 words
A linear induction motor comprising an armature having a plurality of planar radially extending fins of electrically conductive material, a generally wedge-shaped multiphase wound magnetic field member between each pair of adjacent fins to define a pair of opposed pole faces facing corresponding coextensive portions of confronting inner surfaces of said pair of adjacent fins, respectively, and spaced apart a small distance therefrom, said coextensive portions having a radial length constituting a major part of the total radial length of said fins, whereby said magnetic field member, when multiphase energized, produces a magnetic field axially progressing along said pole faces to cause axial relative movement of said armature and said magnetic field member.
Claim 9
Dependent Claim
101 words
A linear induction motor comprising an armature having a plurality of radially extending armature plates defining therebetween a plurality of intervals having a substantially sector-type cross section, a plurality of generally wedge-shaped multiphase wound magnetic field members inserted in said intervals, respectively, to define a plurality of radially extending pole faces closely spaced apart from said armature plates, said magnetic field members being substantially entirely located within said intervals, said magnetic field members being adapted to produce, when multiphase energized, adjacent said pole faces an axially progressing magnetic field causing axial relative movement of said armature and said magnetic field members.
Claim 10
Dependent Claim
101 words
A linear induction motor comprising an armature having a plurality of radially extending armature plates defining therebetween a plurality of intervals having a substantially sector-type cross section, a plurality of generally wedge-shaped multiphase wound magnetic field members inserted in said intervals, respectively, to define a plurality of radially extending pole faces closely spaced apart from said armature plates, said magnetic field members being substantially entirely located within said intervals, said magnetic field members being adapted to produce, when multiphase energized, adjacent said pole faces an axially progressing magnetic field causing axial relative movement of said armature and said magnetic field members.
Claim 11
Dependent Claim
103 words
A linear induction motor comprising an armature having a plurality of radially extending armature plates of electrically conductive material, a plurality of generally wedge-shaped multiphase wound magnetic field members inserted between each pair of said armature plates, each of said magnetic field members defining a pair of dihedral pole faces closely spaced apart from the corresponding pair of plates, said magnetic field members being substantially entirely accommodated between said armature plates, said magnetic field members being adapted to produce, when multiphase energized, adjacent said pole faces an axially progressing magnetic field causing axial relative movement of said armature and said magnetic field members.
Claim 12
Dependent Claim
103 words
A linear induction motor comprising an armature having a plurality of radially extending armature plates of electrically conductive material, a plurality of generally wedge-shaped multiphase wound magnetic field members inserted between each pair of said armature plates, each of said magnetic field members defining a pair of dihedral pole faces closely spaced apart from the corresponding pair of plates, said magnetic field members being substantially entirely accommodated between said armature plates, said magnetic field members being adapted to produce, when multiphase energized, adjacent said pole faces an axially progressing magnetic field causing axial relative movement of said armature and said magnetic field members.
References Cited (Backward Citations)
US1422427A
Cited
US2112264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |