Electricity: transmission to vehicles – Magnetic induction
Reexamination Certificate
1998-09-25
2001-04-10
Le, Mark T. (Department: 3617)
Electricity: transmission to vehicles
Magnetic induction
C104S130030, C104S242000
Reexamination Certificate
active
06213269
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a power supply system for a long-stator drive.
BACKGROUND INFORMATION
A conventional power supply system is described, for example, in German Patent No. 28 05 994. The conventional power supply system has two mutually independent tracks, each having a long-stator winding. The winding sections of each track can be connected to the substations via two parallel power cables and switching devices. The switching devices include non-contacting semiconductor switches and contacting switching elements. The contacting switching element is closed by the corresponding semiconductor switch before the voltage is connected, while in contrast the contacting switching element is opened by the semiconductor switch after the voltage has been disconnected.
Furthermore, “Energieversorgund des Langstatorantriebs” Supplying Power to a Long-Stator Drive), J. Meins, “etz”, Vol. 108, No. 9, 1987, pp. 378-81 describes a conventional power supply system for a long-stator drive. This power supply system includes a track having a left and a right motor side. A plurality of long-stator sections are combined to form at least one drive region. Each drive region is characterized in that all its stator sections are supplied with power by the same converter. The limits for the drive regions are generally chosen such that these limits are at the preselected interval between trains, so that a plurality of vehicles may travel at the same time interval on the single track.
In addition, for a track having a long stator, a track-changing device, designed as a switch, is described in “Stand der Entwicklung des elektromagnetischen Schnellbahnsystems” (Development Status of the Electromagnetic High-Speed Railway System), Von Rudolf Zurek, ZEV-Glas. Ann., Vol. 104, Nos. 8-9, August-September 1980, pp. 233-40. The relevant switching section ends at the moving end of the switch.
In addition, French Patent No. 2,688,523 describes a track-changing device for two independent tracks of a long-stator drive. The track-changing device is designed as a switch and the two independent tracks each have at least one long-stator segment.
Finally, German Patent No. 25 44 665 describes a mechanically regulatable switch for a magnetic overhead railway. The switch includes a movable tongue, on which a stator winding of a linear motor and secondary conductor loops, situated beneath, are arranged.
SUMMARY OF THE INVENTION
An object of the present invention is to simplify supplying power to a long-stator section. The relevant switching section ends at the moving end of the switch.
In addition, French Patent 2,688,523 A1 discloses a track-changing device for two independent tracks of a long-stator drive. The track-changing device is designed as a switch and the two independent tracks each have at least one long-stator segment.
The object of the present invention, in the case of a power supply system for a long-stator drive, is to make it simple to supply power to a long-stator section which is routed via at least one track-changing device.
The power supply system according to the present invention for a long-stator drive includes at least two independent tracks which each have at least one long-stator section and which can be connected to one another using at least one track-changing device. The long-stator sections are split into a plurality of drive regions, by means of which each vehicle can be independently driven. At least one track-changing device has at least one electrical contact which is positively guided by the track-changing device in such a manner that an electrical connection can be produced or eliminated between various long-stator sections.
In the case of a power supply system, at least one long-stator section is connected to one drive region or the other. The limits of the drive regions can therefore be set as required. The track or parts of it can thus be assigned to different drive regions as a function of the position of the track-changing device or devices. The time during which the drive regions are occupied can thus be adjusted in a simple manner.
Reliable disconnection of the relevant long-stator section is necessary, for example, if the vehicle is moving towards an open switch end, under conditions of a fault having occurred. The switches would therefore have to be monitored continuously for correct operation by very expensive monitoring devices in the highest safety category. In the event of a fault, i.e., in the event of the failure of the monitoring device or failure of the switching devices, all the drive regions which could be supplied on the relevant track region must be disconnected from the power supply system. This generally results in a serious operational disturbance.
The cabling cost for a power supply system according to an exemplary embodiment of the present invention is particularly low, whereas, in contrast, a power supply system according to another exemplary embodiment of the present invention allows large drive regions to be reconfigured.
REFERENCES:
patent: 3854411 (1974-12-01), Lichtenberg
patent: 5499583 (1996-03-01), Blumel
patent: 25 44 665 (1977-04-01), None
patent: 28 05 994 (1979-08-01), None
patent: 2 688 523 (1993-09-01), None
“Energieversorgung des Langstatorantriebs” [Supplying Power to a Long-Stator Drive], J. Meins, “etz”, vol. 108, No. 9, 1987, pp. 378-381.*
“Stand der Entwicklung des elektromagnetischen Schnellbahnsystems” [Development Status of the Electromagnetic High-Speed Railway System], Von Rudolf Zurek, ZEV-Glas. Ann., vol. 104, Nos. 8-9, Aug.-Sep. 1980, pp. 233-240.
Kenyon & Kenyon
Le Mark T.
Siemens AG
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