US3904941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive power supply system for thyristorized linear motor utilizing feeder section switches controlled by position detectors for controlling the energization of ground coils
Assignee: Japan National Railways
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Filing: 1973-05-31
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Granted: 1975-09-09
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Expires: 1993-05-31
Abstract
Abstract A transport means drive power supply control system is provided in which the transport means includes field coils. At least one dc constant current forward-reverse converter is provided and a first plurality of thyristor switch circuits are provided which correspond to the dc constant current forward-reverse converters. A feeder is coupled to the output of the thyristor switch circuits, and a second plurality of ground coils are provided wherein the plurality of thyristor switch circuits is less than the plurality of ground coils. Position detectors are located in proximity to the ground coils for detecting the position of the transport means, and feeder section switches are coupled between the feeder and the ground coils and are controlled by the position detectors for controlling the energization of the ground coils in a predetermined relationship to the position of the transport means. Thus, the magnetic fields of the ground coils interact with the field coils to provide a driving force to the transport means.
Inventors
- 👤 Kazumi Matsui
- 👤 Takashi Umemori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/002; B60L15/005; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A transport means drive power supply control system wherein said transport means includes field coils said system comprising: a. at least one dc constant current forward-reverse converter; b. a first plurality of thyristor switch circuits corresponding to said dc constant current forward-reverse converters; c. feeder means coupled to the output of said thyristor switch circuits; d. a second plurality ground coil means, said ground coil means being geometrically integral but electrically sectioned wherein said first plurality is less than said second plurality; e. position detector means located in proximity to said ground coil means for detecting the position of said transport means; and f. feeder section switch means, coupled between said feeder means and said ground coil means, and controlled by said position detector means for controlling the energization of said ground coiL means in a predetermined relationship to the position of said transport means whereby the magnetic fields of said ground coil means interacts with said field coils to provide a driving force to said transport means.
Claim 2
Dependent Claim
168 words
A transport means drive power supply control system wherein said transport means includes field coils said system comprising: a. at least one dc constant current forward-reverse converter; b. a first plurality of thyristor switch circuits corresponding to said dc constant current forward-reverse converters; c. feeder means coupled to the output of said thyristor switch circuits; d. a second plurality ground coil means, said ground coil means being geometrically integral but electrically sectioned wherein said first plurality is less than said second plurality; e. position detector means located in proximity to said ground coil means for detecting the position of said transport means; and f. feeder section switch means, coupled between said feeder means and said ground coil means, and controlled by said position detector means for controlling the energization of said ground coiL means in a predetermined relationship to the position of said transport means whereby the magnetic fields of said ground coil means interacts with said field coils to provide a driving force to said transport means.
Claim 3
Dependent Claim
45 words
The system of claim 1 wherein a position detector means corresponds to each ground coil means and is coupled to the feeder section switch means corresponding to the ground coil means prior to and succeeding the ground coil means corresponding to said position detector means.
Claim 4
Dependent Claim
39 words
The system of claim 1 wherein a position detector means corresponds to each ground coil means and is coupled to the feeder section switch means of the succeeding ground coil means and to the second preceeding ground coil means.
Claim 5
Dependent Claim
169 words
A transport means drive power supply control system wherein said transport means includes field coils said system comprising; a. ground coil means, electrically sectioned but geometrically integral; b. at least one dc constant current forward-reverse converter; c. feeder means coupled to said dc constant current forward-reverse converter; d. feeder section switch means coupled to said feeder means; e. thyristor switch circuit means coupled to said feeder section switch means and coupled to said ground coil means, wherein said feeder section switch means control the current through said thyristor switch circuit means; and f. position detector means located in proximity to the ground coil means and coupled to said feeder section switch means for controlling said feeder section switch means in accordance with the position of said transport means, whereby said ground coils are energized in a predetermined relationship to the position of said transport means such that the magnetic field of said ground coil means interacts with said field coil to provide a driving force to said transport means.
Claim 6
Dependent Claim
169 words
A transport means drive power supply control system wherein said transport means includes field coils said system comprising; a. ground coil means, electrically sectioned but geometrically integral; b. at least one dc constant current forward-reverse converter; c. feeder means coupled to said dc constant current forward-reverse converter; d. feeder section switch means coupled to said feeder means; e. thyristor switch circuit means coupled to said feeder section switch means and coupled to said ground coil means, wherein said feeder section switch means control the current through said thyristor switch circuit means; and f. position detector means located in proximity to the ground coil means and coupled to said feeder section switch means for controlling said feeder section switch means in accordance with the position of said transport means, whereby said ground coils are energized in a predetermined relationship to the position of said transport means such that the magnetic field of said ground coil means interacts with said field coil to provide a driving force to said transport means.
Claim 7
Dependent Claim
21 words
The system of claim 4 wherein said feeder section switch means includes a positive switch means and a negative switch means.
Claim 8
Dependent Claim
44 words
The system of claim 5 wherein said position detector means correspond to said ground coil means and are coupled to said negative switch means corresponding to the succeeding ground coil means and to the positive switch means corresponding to the corresponding ground coil means.
Claim 9
Dependent Claim
45 words
The system of claim 5 wherein said position detector means correspond to said ground coil means and are connected to the negative switch means corresponding to the succeeding ground coil means and to the positive switch means corresponding to the second preceeding ground coil means.
Claim 10
Dependent Claim
90 words
The system of claim 5 wherein said position detector means correspond to said ground coil means and produce an on signal coupled to the negative switch means of the succeeding coil means and the positive switch means of the corresponding ground coil means and an off signal coupled to the positive switch means of the preceeding ground coil means and the negative switch means of the corresponding ground coil means and wherein the output of each negative switch means is coupled to the output of a succeeding positive switch means.
Claim 11
Dependent Claim
72 words
The system of claim 5 wherein said position detector means correspond to said ground coil means and produce an on signal coupled to a succeeding negative switch means and a preceeding positive switch means and an off signal coupled to the corresponding negative switch means and the second preceeding positive switch means and where the output of each negative switch means is coupled to the output of the succeeding positive switch means.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |