System having an electric consumer

Patent metadata

Field	Value
Publication number	US-11890950-B2
Application number	US-201917298155-A
Country	US
Kind code	B2
Filing date	Oct 24, 2019
Priority date	Nov 29, 2018
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A system having electric consumers includes an electrical device including an operating device and wires supplying the consumer. A first wire is provided for conducting the first phase of a three-phase voltage during a normal operation, a second wire conducts a second phase of the three-phase voltage, and a third wire conducts a third phase of the three-phase voltage. The consumer is able to be supplied with the three-phase voltage from the wires during a normal operation. The operating device is configured so that: in a normal operation, the first wire is connected to the first phase of the three-phase voltage; and in a safety case, the first wire is separated from the first phase of the three-phase voltage and will be or is connected to the second phase of the three-phase voltage.

First claim

The invention claimed is:

1. A system, comprising:
an electric consumer; and
an electrical device including an operating device and wires adapted to supply the consumer, a first one of the wires adapted to conduct a first phase of a three-phase voltage during a normal operation, a second one of the wires adapted to conduct a second phase of the three-phase voltage, a third one of the wires adapted to conduct a third phase of the three-phase voltage, the wires adapted to supply the consumer with the three-phase voltage during the normal operation;
wherein the operating device is adapted to connect the first wire to the first phase of the three-phase voltage during the normal operation, and to separate the first wire from the first phase of the three-phase voltage and to connect the first wire to the second phase of the three-phase voltage in a safety case.

2. The system according to claim 1 , wherein the electric consumer includes a drive and/or an electric motor supplied by an inverter.

3. The system according to claim 1 , wherein the wires are arranged as collector wires.

4. The system according to claim 1 , wherein the operating device includes two contactors that include changeover contacts switchable in series.

5. The system according to claim 4 , wherein control coils of the two contactors are switchable in parallel.

6. The system according to claim 4 , wherein a changeover contact of a second contactor connects the first phase or the second phase of the three-phase voltage to an electrical wire, and the changeover contact of a first contactor connects the second phase or the electrical wire to the first wire.

7. The system according to claim 1 , wherein the consumer includes a control which having a safety relay, and the control is adapted to be supplied by a rectifier supplied from a voltage present between the second wire and the third wire.

8. The system according to claim 7 , wherein the consumer is arranged as a mobile part.

9. The system according to claim 1 , wherein a stationary emergency switch is adapted to trigger the safety case, to terminate the normal operation, and to transition from the normal operation to the safety case.

10. The system according to claim 9 , the emergency switch includes a pressure mat, a light barrier, and/or a light-barrier system having a light grating.

11. The system according to claim 1 , wherein the three-phase voltage is supplied from a public supply network and/or a public alternating voltage supply network.

12. The system according to claim 1 , wherein the consumer is arranged as a mobile part that includes at least one sliding collector for each one of the wires, each sliding collector touching a respective wire.

13. The system according to claim 4 , wherein the consumer is arranged as a mobile part that includes a third contactor and a fourth contactor having control coils switched in parallel and/or supplied from a voltage present between the first wire and the second wire, at least one contactor being adapted to generate and/or make available to a drive a release signal, and/or a safety-directed STO signal.

14. The system according to claim 13 , wherein the first wire is connected to the second wire or to an electrical ground via a resistor having a resistance that is less than half of an ohmic resistance of the control coil of the third contactor, the third contactor and the fourth contactor having an identical configuration.

15. A rail system, comprising:
rail sections; and
a mobile part:
wherein each rail section includes an electrical device including an operating device, a rail, and collector wires connected in parallel thereto, a first one of the collector wires adapted to conduct a first phase of a three-phase voltage during a normal operation, a second one of the collector wires adapted to conduct a second phase of the three-phase voltage, a third one of the collector wires adapted to conduct a third phase of the three-phase voltage, the mobile part including sliding collectors so that a drive of the mobile part is suppliable with the three-phase voltage from the collector wires during the normal operation;
wherein the operating device is adapted to connect the first conductor wire to the first phase of the three-phase voltage during the normal operation, and to separate the first collector wire from the first phase of the three-phase voltage and connect the first collector wire to the second phase of the three-phase voltage in a safety case.

16. The rail system according to claim 15 , wherein the drive includes an electric motor fed by an inverter.

17. The rail system according to claim 15 , wherein the wires are arranged as collector wires.

18. The rail system according to claim 15 , wherein the operating device includes two contactors that include changeover contacts switchable in series.

19. The rail system according to claim 18 , wherein control coils of the two contactors are switchable in parallel.

20. The rail system according to claim 18 , wherein a changeover contact of a second contactor connects the first phase or the second phase of the three-phase voltage to an electrical wire, and the changeover contact of a first contactor connects the second phase or the electrical wire to the first wire.

21. The rail system according to claim 15 , wherein the consumer includes a control which having a safety relay, and the control is adapted to be supplied by a rectifier supplied from a voltage present between the second wire and the third wire.

22. The rail system according to claim 21 , wherein the consumer is arranged as a mobile part.

23. The rail system according to claim 15 , wherein an isolation block is arranged between the first collector wires of the rail sections, a monitor unit adapted to supply the isolation block with voltage only if voltages detected by the monitoring unit at the first collector wires have peak values and/or effective values that are similar to one another in magnitude.

24. The rail system according to claim 15 , wherein a stationary emergency switch is adapted to trigger the safety case, to terminate the normal operation, and to transition from the normal operation to the safety case.

25. The rail system according to claim 24 , the emergency switch includes a pressure mat, a light barrier, and/or a light-barrier system having a light grating.

26. The rail system according to claim 15 , wherein the three-phase voltage is supplied from a public supply network and/or a public alternating voltage supply network.

27. The rail system according to claim 15 , wherein the consumer is arranged as a mobile part that includes at least one sliding collector for each one of the wires, each sliding collector touching a respective wire.

28. The rail system according to claim 18 , wherein the consumer is arranged as a mobile part that includes a third contactor and a fourth contactor having control coils switched in parallel and/or supplied from a voltage present between the first wire and the second wire, at least one contactor being adapted to generate and/or make available to a drive a release signal, and/or a safety-directed STO signal.

29. The rail system according to claim 15 , wherein a dataflow is modulated between the second collector wire and the third collector wire, so that a data transmission from a stationary part of the rail system is able to take pla

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Henkel Rico
• Bund Martin
• Epp Mario
• Hien Stefan

Classifications

• B60L5/36 Primary

  with means for collecting current simultaneously from more than one conductor, e.g. from more than one phase · CPC title

• B60M3/04 Primary

  Arrangements for cutting in and out of individual track sections (by passage of the vehicle B60M1/10) · CPC title

• H02H7/08

  for dynamo-electric motors · CPC title

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• B60M7/00

  Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway · CPC title