POWER SUPPLY OF A DETECTION UNIT

Abstract

A power supply device for supplying power to a consumer disposed on a rail vehicle is being configured for generating a supply voltage of the consumer from a voltage applied to the conductor. Transmission electronics and a bypass conductor connectable in an electrically conductive manner to the consumer via the transmission electronics are provided and the transmission electronics is switched between the bypass conductor and the consumer and the bypass conductor is connected in an electrically conductive manner to the conductor by means of two fastening interfaces, a potential difference being present between the fastening interfaces and the bypass conductor being designed in such a manner that the bypass conductor generates an output voltage and the transmission electronics being designed in such a manner that the transmission electronics generates the supply voltage of the consumer from the output voltage.

Claims

1. A power supply device (1) for supplying power to a consumer disposed on a rail vehicle, the rail vehicle having at least one conductor (4) and the power supply device (1) being configured for generating a supply voltage of the consumer (2) from a voltage applied to the conductor (4), wherein transmission electronics (5) and a bypass conductor (6) connectable in an electrically conductive manner to the consumer (2) via the transmission electronics (5) are provided and the transmission electronics (5) is switched between the bypass conductor (6) and the consumer (2) and the bypass conductor (6) is connected in an electrically conductive manner to the conductor (4) of the rail vehicle, by means of two fastening interfaces (8), a potential difference being present between the fastening interfaces (8) and the bypass conductor (6) being designed in such a manner that the bypass conductor (6) generates an output voltage which is lower than the potential difference at the conductor (4) between the fastening interfaces (8), the transmission electronics (5) being designed in such a manner that the transmission electronics (5) generates the supply voltage of the consumer (5) from the output voltage of the bypass conductor (6).

2. The power supply device according to claim 1, wherein the transmission electronics (5) has a component for voltage transformation (9).

3. The power supply device according to claim 1, wherein the transmission electronics (5) has a component for rectification (10).

4. The power supply device according to claim 1, wherein the transmission electronics (5) has charging electronics (12) comprising at least one component for energy storage, preferably at least one capacitor (13).

5. The power supply device according to claim 1, further including monitoring electronics (14) for monitoring the component for voltage transformation (9).

6. The power supply device according to claim 1, wherein the bypass conductor (6) is designed in the manner of a straight electric conductor.

7. The power supply device according to claim 1, wherein the input resistance of the bypass conductor (6) or the consumer (2) is greater than the internal resistance of the conductor (4).

8. The power supply device according to claim 1, further including a power generation unit selected from the group consisting of a fuel cell, a photoelectric generator, a piezoelectric generator, a kinetic generator and/or a thermoelectric generator.

9. A monitoring system (15) having a power supply device (1) according to claim 1 and a consumer designed as an acquisition unit (2) and serving to monitor operating units (3), data being acquired for different attributes of the corresponding operating units (3) by means of the acquisition device (2).

10. The monitoring system according to claim 9, wherein the acquisition unit (2) has a sensor device (16) fixedly disposed on a corresponding operating unit (3) or the rail vehicle.

11. The monitoring system according to claim 9, wherein the acquisition unit (2) has a transmission device (17) fixedly disposed on a corresponding operating unit (3) or the rail vehicle (11).

12. The monitoring system according to claim 9, wherein the acquisition unit (2) has a time sensor and a position sensor so that an acquisition time and a location of the corresponding operating unit (3) is determinable.

13. The monitoring system according to claim 9, wherein the monitoring system, in particular the acquisition unit (2), has an energy meter.

14. The monitoring system according to claim 9, wherein the monitoring system (15) comprises at least one operating unit (3).

15. A method for supplying power to a consumer (2) disposed on a rail vehicle, the consumer (2) being an acquisition unit (2) for monitoring rail vehicles, comprising applying a first voltage to a conductor (4) of the rail vehicle by a current flow through a conductor being generated, and a second voltage being tapped at the conductor (4) between two fastening interfaces (8) as an output voltage of the bypass conductor (6) by means of the bypass conductor (6) and the output voltage of the bypass conductor (6) being used for supplying power to the consumer (2).

16. The method for supplying power according to claim 15, comprising generating the supply voltage required by the consumer (2) by the voltage transformation of the outlet voltage of the bypass conductor (6).

17. The method for supplying power according to claim 15, comprising rectifying the output voltage of the bypass conductor (6).

18. The method for supplying power according to claim 15, comprising providing the supply voltage of the consumer (2) by at least one component for energy storage (12).

19. The method according to claim 15, comprising detecting and recording the traveling current or electric arcs or a traveling.

Description

[0054] In the following, a preferred embodiment of the invention is explained in more detail with reference to the attached drawing.

[0055] FIG. 1 shows a schematic representation of a monitoring system according to the invention with a power supply device disposed on a current collector.

[0056] FIG. 1 shows a schematic representation of a monitoring system 15 with a power supply device 1 together with a current collector 7 designed as a pantograph and comprising a part of a conductor of a rail vehicle designed as a main conductor 4. The transmission electronics 5 is used to transmit the electrical energy from the bypass conductor 6 to the consumer in the form of an acquisition unit 2. Not shown here is the catenary to which the current collector 7 is connected via the contact strip of the current collector 7 to supply the rail vehicle with power from the supply network. Also not shown is the rail vehicle, on whose roof the current collector 7 is disposed and which can be moved on the rails 18, which also form the ground of the system. FIG. 1 also shows that the fastening interfaces 8 of the power supply device 1 are disposed in such a manner on the current collector 7 that there is a maximum potential difference of 100 V between the fastening interfaces 8. In contrast, there is a potential difference of 15 kV between the current transfer point, i.e., the point at which the contact strip of the current collector 7 and the catenary (not shown) touch, and the ground potential. The bypass conductor 6 generates a voltage of at least 0.2 V, preferably 0.4 V, via the electrical bypass line with a lower current flow than in the main conductor 4. According to the embodiment shown, the bypass conductor 6 generates an alternating voltage. This AC voltage is rectified with the component for rectification 10, the voltage also being limited with the aid of an active limiter 11. A voltage of 3.8 V is generated from the outlet voltage of the component for rectification 10, which can be between 0.35 V and 16 V, with the aid of the component for voltage transformation 9, in this case a voltage converter. The capacitors used as component for energy storages 13 are supplied via charging electronics 12, so that the acquisition unit 2 can be supplied with the necessary supply voltage of 3.3 V even when the rail vehicle is at a standstill or during braking phases in operation, when the voltage drop on the bypass conductor 6 is too low. FIG. 1 thus shows an embodiment in which the current flows from the bypass conductor 6 through a component for rectification 10 and a voltage limitation component 11, then through a component for voltage transformation 9 and the charging electronics 12 to the acquisition unit 2. Owing to the shown design of the power supply device, the acquisition unit 2 can be safely and reliably supplied with the DC voltage required to operate the acquisition unit 2 via an AC voltage tapped at the current collector 7. In addition to the acquisition unit 2, the active limiter 11, the rectifier 10 and the voltage converter 9 are also supplied via the component for energy storage 13 of the charging electronics 12. The initial ignition of the voltage converter 9 is generated via a pulse whose energy requirement is also covered by the component for energy storage 13. In order to avoid unnecessary discharging of the component for energy storage 13, monitoring electronics 14 is provided which monitors the ignition of the voltage converter 9 and prevents unnecessary ignition processes, for example when the bypass voltage is unstable. The acquisition unit 2 has a sensor device 16 fixedly disposed on the rail vehicle and serving to monitor an operating unit 3, in this case a current collector 7, the acquisition unit 2 being used to record data for various attributes of the current collector 7. The data can be transmitted to an evaluation device (not shown), using the transmission device 17. For example, the condition of the contact strip of the current collector 7 can be determined and maintenance and/or replacement of the contact strips can be carried out in good time.