US3835339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement relative to linear induction motors and cooling devices applied to the same
Assignee: Compagnie Electro Mecanique SA
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Filing: 1973-05-09
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Granted: 1974-09-10
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Expires: 1993-05-09
Abstract
Abstract A linear induction motor comprises armature and inductor components one of which is mounted for movement along a rectilinear path relative to the other. The inductor component includes a rectangular laminated body made from sheets of magnetic material and which provides a row of spaced teeth confronting the armature member, longitudinally spaced energizable coil means surround the body of the inductor between the teeth and longitudinally spaced heat-radiating units made from a material, which has good heat-conductivity characteristic, and is also amagnetic, surround the inductor body on all sides except the toothed side. These heat radiating units are provided with vaned surfaces to collect part of the heat given off by the coils and other vaned surfaces for dissipating the heat thus collected to the ambient air. If the heat-radiating unit is made from a material which is also electrically conductive, it effects a reduction in leakage flux.
Inventors
- 👤 J Laronze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:56
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
A linear type induction motor structure characterized by an inductor component comprising a laminated rectilinear member made from magnetic material including a main body portion serving as a yoke and a row of spaced teeth projecting from one side thereof to thereby establish coil slots therebetween, energizable ringshaped coils surrounding the main body portion of said inductor component, each said coil having a portion thereof seated in a correspondingly positioned slot of said inductor component, and a U-shaped heat- radiating unit made from a metallic amagnetic material having a good heat conductivity characteristic and which straddles said rectilinear inductor component on three sides, said heat-radiating unit including one set of vane surfaces located respectively between corresponding portions of adjacently positioned coils for Collecting part of the heat given off by said coils and functioning also as a magnetic screen between adjacent coils to oppose flow of leakage flux and further including another set of vane surfaces projecting beyond the peripheries of said coils for dissipating into the ambient air the heat collected from said coils.
Claim 2
Dependent Claim
175 words
A linear type induction motor structure characterized by an inductor component comprising a laminated rectilinear member made from magnetic material including a main body portion serving as a yoke and a row of spaced teeth projecting from one side thereof to thereby establish coil slots therebetween, energizable ringshaped coils surrounding the main body portion of said inductor component, each said coil having a portion thereof seated in a correspondingly positioned slot of said inductor component, and a U-shaped heat- radiating unit made from a metallic amagnetic material having a good heat conductivity characteristic and which straddles said rectilinear inductor component on three sides, said heat-radiating unit including one set of vane surfaces located respectively between corresponding portions of adjacently positioned coils for Collecting part of the heat given off by said coils and functioning also as a magnetic screen between adjacent coils to oppose flow of leakage flux and further including another set of vane surfaces projecting beyond the peripheries of said coils for dissipating into the ambient air the heat collected from said coils.
Claim 3
Dependent Claim
24 words
A linear induction motor structure as defined in claim 1 wherein the material from which said heat-radiating unit is made is also electrically conductive.
Claim 4
Dependent Claim
59 words
A linear induction motor structure as defined in claim 1 wherein said heat-radiating unit comprises a body having a U-shaped profile which fits upon and straddles said inductor component, said U-shaped body being provided with a plurality of interior vanes engaged with the surface of the inductor component between adjacent coils, and a plurality of exterior heat dissipating vanes.
Claim 5
Dependent Claim
58 words
A linear induction motor structure as defined in claim 1 wherein said heat-radiating unit is constituted by U-shaped plates which straddle the body of said inductor component between adjacent coils and project radially on three sides thereby to constitute both a vane surface collecting heat and a vane surface for dissipating the collected heat to the ambient air.
Claim 6
Dependent Claim
55 words
A linear induction motor structure as defined in claim 4 wherein the body of said inductor component is covered by a layer of insulating material from the yoke side thereof to the level of the bottoms of the notches between adjacent teeth and said vanes are engaged in transverse grooves provided in said insulating layer.
Claim 7
Dependent Claim
32 words
A linear induction motor structure as defined in claim 5 wherein the layer of insulating material applied to the body of said inductor component is a synthetic resin of the thermo-setting type.
Claim 8
Dependent Claim
31 words
A linear induction motor structure as defined in claim 5 wherein the surfaces of said vanes are insulated and lie in direct contact with the coil units of said coil means.
Claim 9
Dependent Claim
40 words
A linear induction motor structure as defined in claim 1 wherein the thickness of the vane surfaces on said heat-radiating unit is equal to the distance between adjacent coils so as to make contact with the sides of said coils.
Claim 10
Dependent Claim
40 words
A linear induction motor structure as defined in claim 1 wherein the vane surfaces on said heat-radiating unit between adjacently positioned coils are constituted by two spaced vane elements so as to establish therebetween a channel for circulation of air.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |