US3924537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic rails for driving trains by thyristor-controlled linear motors
Assignee: Japan National Railways
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Filing: 1973-07-26
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Granted: 1975-12-09
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Expires: 1993-07-26
Abstract
Abstract Herein disclosed is an electromagnetic rail for driving a train by a thyristor-controlled linear motor including field structures mounted on the train and armature coils laid down on the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor. The electromagnetic rail according to the present invention is characterized in that said armature coils comprises a plurality of undulating composite coil arrays, an insulator covering said composite coil arrays and a support secured to the ground for anchoring said composite coil arrays and said insulator at the ground, and in that all of said composite coil arrays and said insulator are moulded into a unitary structure. The present electromagnetic rail is advantageous in that the floating and driving forces can be created smoothly, and in that it can stand a high voltage built up therein and an ample current which is flowing through the armature coil.
Inventors
- 👤 Kazumi Matsui
- 👤 Takashi Umemori
- 👤 Kenji Matsuura
- 👤 Yoshikado Hosoda
- 👤 Tadashige Nishikawa
- 👤 Makoto Tawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; H02K41/031; B; B60; B60L; B60L13/00; B60L13/03; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
186 words
In an electromagnetic rail for driving a train by a thyristor-controlled linear motor including a field structure mounted on the train and an armature coil fixed relative to the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor, the improvement wherein: said electromagnetic rail comprises an armature coil assembly consisting on N pairs of undulating coil arrays, the coil sides of which contributes a driving force and/or a floating force to the train and one coil array of each pair is displaced one coil pitch interval from the other coil array of said pair, said pairs are displaced at 1/N coil pitch intervals from one another, an insulator covers said coil arrays and is molded integrally with said coil arrays into a unitary plate-form body, and wherein a support supports said molded and insulated armature coil arrays in such a manner that the current loops of the currents flowing in said coil arrays are vertical to the ground.
Claim 2
Dependent Claim
186 words
In an electromagnetic rail for driving a train by a thyristor-controlled linear motor including a field structure mounted on the train and an armature coil fixed relative to the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor, the improvement wherein: said electromagnetic rail comprises an armature coil assembly consisting on N pairs of undulating coil arrays, the coil sides of which contributes a driving force and/or a floating force to the train and one coil array of each pair is displaced one coil pitch interval from the other coil array of said pair, said pairs are displaced at 1/N coil pitch intervals from one another, an insulator covers said coil arrays and is molded integrally with said coil arrays into a unitary plate-form body, and wherein a support supports said molded and insulated armature coil arrays in such a manner that the current loops of the currents flowing in said coil arrays are vertical to the ground.
Claim 3
Dependent Claim
30 words
An electromagnetic rail according to claim 1, wherein said armature coil assembly further comprises a linear conductor for merely contributing to the floating force, juxtaposed to said undulating coil arrays.
Claim 4
Dependent Claim
43 words
An electromagnetic rail according to claim 1, wherein said armature coil assembly comprises at least one longitudinal row of two undulating composite coil arrays respectively acting as a supply passage and as a return passage and juxtaposed at one-coil-pitch intervals from each other.
Claim 5
Dependent Claim
66 words
An electromagnetic rail according to claim 1, wherein said electromagnetic rail comprises two rail units each including same number of undulating composite coil arrays and laid down on the ground in parallel with each other and wherein the composite coil arrays of one of said two rail units act as a supply passage and the composite coil arrays of the other act as a return passage.
Claim 6
Dependent Claim
21 words
An electromagnetic rail according to claim 1, wherein said composite coil arrays are arranged symmetrically with respect to the longitudinal direction.
Claim 7
Dependent Claim
52 words
An electromagnetic rail according to claim 1, wherein said armature coil assembly further comprises a metal strip of heat conductivity disposed in a space, defined by the three sides of said undulating composite coil arrays and being in contact with coil sides foR conducting therethrough heat generated in said composite coil arrays.
Claim 8
Dependent Claim
34 words
An electromagnetic rail according to claim 1, wherein said armature coil assembly further comprises a led-out portion integrally moulded with the main body of said electromagnetic rail at the lower ends of said rail.
Claim 9
Dependent Claim
73 words
An electromagnetic rail according to claim 1, wherein said support comprises a hollow rectangular box body formed with a longitudinal opening of a predetermined width, and two support plates extend upright from the edges of said opening are juxtaposed to each other and clamped in between the armature coil structure such that the joint portion of said armature coil is suspended into the interior of said hollow rectangular box body through said opening.
Claim 10
Dependent Claim
39 words
An electromagnetic rail according to claim 1, wherein said armature coil assembly further comprises a longitudinal semiconductive layer coated on each of said armature coil arrays and an insulating covering enclosing said armature coil arrays and said semiconductive layer.
Claim 11
Dependent Claim
40 words
An electromagnetic rail according to claim 9, wherein said insulating covering includes two undulating halves formed with grooves which are sized to receive therein said armature coil arrays together with said semiconductive layer when they are joined to each other.
Claim 12
Dependent Claim
60 words
An electromagnetic rail according to claim 1, wherein said armature coil assembly further comprises an induction coil made of a rectangular short circuited coil disposed in a lower space, which is surrounded by the three sides of said composite coil array, and wherein said composite coil arrays are moulded together with said induction coil into a unitary armature coil structure.
Claim 13
Dependent Claim
248 words
In an electromagnetic rail for driving a train by a thyristor-controlled linear motor including a field structure mounted on the train and an armature coil fixed relative to the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor, the improvement wherein: said electromagnetic rail comprises an armature coil assembly consisting on N pairs of undulating coil arrays, the coil sides of which contributes a driving force and/or a floating force to the train and one coil array of each pair is displaced one coil pitch interval from the other coil array of said pair, said pairs are displaced at 1/N coil pitch intervals from one another, an insulator covers said coil arrays and is molded integrally with said coil arrays into a unitary plate-form body, and wherein a support supports said molded and insulated armature coil arrays in such a manner that the current loops of the currents flowing in said coil arrays are vertical to the ground and wherein said armature coil assembly comprises a plurality of composite coil arrays each including two rows of undulating coils, juxtaposed at a one-coil-pitch interval from each other and which have their vertical sides extended to have a thickness no greater than 1/2 of that of their horizontal sides and being overlapped one on the other but separated by an insulator therebetween.
Claim 14
Dependent Claim
248 words
In an electromagnetic rail for driving a train by a thyristor-controlled linear motor including a field structure mounted on the train and an armature coil fixed relative to the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor, the improvement wherein: said electromagnetic rail comprises an armature coil assembly consisting on N pairs of undulating coil arrays, the coil sides of which contributes a driving force and/or a floating force to the train and one coil array of each pair is displaced one coil pitch interval from the other coil array of said pair, said pairs are displaced at 1/N coil pitch intervals from one another, an insulator covers said coil arrays and is molded integrally with said coil arrays into a unitary plate-form body, and wherein a support supports said molded and insulated armature coil arrays in such a manner that the current loops of the currents flowing in said coil arrays are vertical to the ground and wherein said armature coil assembly comprises a plurality of composite coil arrays each including two rows of undulating coils, juxtaposed at a one-coil-pitch interval from each other and which have their vertical sides extended to have a thickness no greater than 1/2 of that of their horizontal sides and being overlapped one on the other but separated by an insulator therebetween.
Claim 15
Dependent Claim
232 words
In an electromagnetic rail for driving a train by a thyristor-controlled linear motor including a field structure mounted on the train and an armature coil fixed relative to the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor, the improvement wherein: said electromagnetic rail comprises an armature coil assembly consisting of N pairs of undulating coil arrays, the coil sides of which contributes a driving force and/or a floating force to the train and one coil array of each pair is displaced one coil pitch interval from the other coil array of said pair, said pairs are displaced at 1/N coil pitch intervals from oNe another, an insulator covers said coil arrays and is molded integrally with said coil arrays into a unitary plate-form body, a support supports said molded and insulated armature coil arrays in such a manner that the current loops of the currents flowing in said coil arrays are vertical to the ground and wherein said armature coil arrays have undulations such that their interconnecting portions are located at the vertical sides thereof, which are extended to have a thickness no greater than 1/2 of that of the remaining sides and which are overlapped one on the other for electrical connection.
Claim 16
Dependent Claim
232 words
In an electromagnetic rail for driving a train by a thyristor-controlled linear motor including a field structure mounted on the train and an armature coil fixed relative to the ground and juxtaposed to said field structure for imparting a driving force and/or a floating force to the train through said field structure when an electric current flowing through said armature coil is commutated by the thyristor, the improvement wherein: said electromagnetic rail comprises an armature coil assembly consisting of N pairs of undulating coil arrays, the coil sides of which contributes a driving force and/or a floating force to the train and one coil array of each pair is displaced one coil pitch interval from the other coil array of said pair, said pairs are displaced at 1/N coil pitch intervals from oNe another, an insulator covers said coil arrays and is molded integrally with said coil arrays into a unitary plate-form body, a support supports said molded and insulated armature coil arrays in such a manner that the current loops of the currents flowing in said coil arrays are vertical to the ground and wherein said armature coil arrays have undulations such that their interconnecting portions are located at the vertical sides thereof, which are extended to have a thickness no greater than 1/2 of that of the remaining sides and which are overlapped one on the other for electrical connection.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |