Electric system

Patent metadata

Field	Value
Publication number	US-11358472-B2
Application number	US-201816487656-A
Country	US
Kind code	B2
Filing date	Feb 16, 2018
Priority date	Feb 24, 2017
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

An electric system has an electrical energy source connected to an electrical energy sink by at least one feeding line. Each feeding line (8) is in at least one position therealong between said source and said sink provided with an arrangement configured to interrupt arcing in the feeding line would such arcing reach this position. The arrangement has a temperature dependent member which upon an increase of the temperature thereof above a predetermined level activates an irreversible movement of movable means (24) which by this movement cuts off the arc (a) and/or removes hot ionized gases (28) and by that prevents the arcing to continue in the feeding line past the arrangement.

First claim

The invention claimed is:

1. An electric system comprising:
an electrical energy source ( 500 ), and
an electrical energy sink ( 2 ) connected to the electrical energy source through at least one feeding line,
wherein said at least one feeding line is in at least one position therealong between said source and said sink provided with an arrangement configured to interrupt arcing in the feeding line would such arcing reach said position, and
said arrangement comprises a temperature dependent member ( 26 , 126 , 229 , 332 , 434 , 537 ) arranged close to the feeding line in said position and configured to, upon an increase of the temperature thereof above a predetermined level, activate an irreversible movement of movable means ( 24 , 124 , 230 , 330 , 424 , 538 , 640 ) included in the arrangement and configured to by this movement cut off the arc (a) and/or remove hot ionized gases ( 28 , 128 , 228 , 328 , 428 , 528 , 628 ) required to maintain the arc to prevent the arcing to continue in this feeding line.

2. An electric system according to claim 1 , wherein the temperature dependent member is formed by a part of the feeding line ( 8 - 10 ) in the region of said position (P) to activate said movement when this part of the feeding line is consumed by an arcing (A).

3. An electric system according to claim 1 , wherein said temperature dependent member comprises a solid body ( 26 , 126 , 229 , 332 , 537 ) of a material melting or losing its mechanical strength at a temperature increasing above said predetermined level and activating movement of said means.

4. An electric system according to claim 1 , wherein said temperature dependent member comprises an explosive ( 434 ) configured to generate an explosion upon an increase of the temperature thereof above said predetermined level to cause a movement of said movable means ( 424 ).

5. An electric system according to claim 1 , wherein each feeding line ( 8 - 10 ) is provided with a plurality of said arrangements at positions spaced along the extension of the feeding line from the electrical energy source ( 1 ) to the electrical energy sink ( 2 ).

6. An electric system for propulsion of a rail vehicle (V), comprising:
an electrical energy source ( 500 ), and
an electrical energy sink ( 2 ) connected to the electrical energy source through at least one feeding line,
wherein said at least one feeding line is in at least one position therealong between said source and said sink provided with an arrangement configured to interrupt arcing in the feeding line would such arcing reach said position,
said arrangement comprises a temperature dependent member ( 26 , 126 , 229 , 332 , 434 , 537 ) arranged close to the feeding line in said position and configured to, upon an increase of the temperature thereof above a predetermined level, activate an irreversible movement of movable means ( 24 , 124 , 230 , 330 , 424 , 538 , 640 ) included in the arrangement and configured to by this movement cut off the arc (a) and/or remove hot ionized gases ( 28 , 128 , 228 , 328 , 428 , 528 , 628 ) required to maintain the arc to prevent the arcing to continue in this feeding line, and as said electrical energy sink;
an electric machine ( 2 ) configured to act as a motor for creating a force of a rail vehicle and comprising:
a) a stator having a stator body with at least one phase ( 4 - 6 ) formed by a stator winding wound therearound and configured to electrically create a plurality of stator poles disposed around the inner periphery of the stator body, and
b) a rotor rotatably disposed within the stator and having a rotor body with a plurality of permanent magnets received therein,
the system further comprising a converter ( 1 ), one side of which being connected to the electrical energy source and the other side of which being connected to terminals ( 11 - 13 ) of each phase of the electric machine through electric conductors in a feeding line in the form of a phase line ( 8 - 10 ) for each phase for feeding electric power between the converter and the electric machine, and
said feeding line is provided with said arrangement in at least one said position located along the feeding line between the electric energy source and the converter and/or in at least one said position located along the feeding line between the converter and the electric machine.

7. An electric system according to claim 6 , wherein each phase line is in at least one position (P) therealong between the converter ( 1 ) and the terminal ( 11 - 13 ) of the electric machine ( 2 ) for that phase provided with said arrangement configured to interrupt arcing in the phase line ( 8 - 10 ) would such arcing reach said position from the converter side thereof.

8. A rail vehicle having an electric system for propulsion thereof according to claim 6 .

9. An electric system for propulsion of a rail vehicle (V), comprising:
an electrical energy source ( 500 ), and
an electrical energy sink ( 2 ) connected to the electrical energy source through at least one feeding line,
wherein said at least one feeding line is in at least one position therealong between said source and said sink provided with an arrangement configured to interrupt arcing in the feeding line would such arcing reach said position,
said arrangement comprises a temperature dependent member ( 26 , 126 , 229 , 332 , 434 , 537 ) arranged close to the feeding line in said position and configured to, upon an increase of the temperature thereof above a predetermined level, activate an irreversible movement of movable means ( 24 , 124 , 230 , 330 , 424 , 538 , 640 ) included in the arrangement and configured to by this movement cut off the arc (a) and/or remove hot ionized gases ( 28 , 128 , 228 , 328 , 428 , 528 , 628 ) required to maintain the arc to prevent the arcing to continue in this feeding line,
said electrical energy source is a DC source in the form of a battery, a fuel cell or a shoegear or pantograph obtaining the energy from a DC-contact line ( 30 ),
the system further comprises a line circuit breaker ( 31 ), one side of which being connected to the electrical energy source and the other side of which being connected to the electrical energy sink, and
said arrangement is arranged in a position along a line connecting said line circuit breaker ( 31 ) to the electrical energy source and configured to interrupt arcing in said line would such arcing reach said position from the line circuit breaker side thereof.

10. An electric system comprising:
an electrical energy source ( 500 ), and
an electrical energy sink ( 2 ) connected to the electrical energy source through at least one feeding line, wherein said at least one feeding line is in at least one position therealong between said source and said sink provided with an arrangement configured to interrupt arcing in the feeding line would such arcing reach said position,
said arrangement comprises a temperature dependent member ( 26 , 126 , 229 , 332 , 434 , 537 ) arranged close to the feeding line in said position and configured to, upon an increase of the temperature thereof above a predetermined level, activate an irreversible movement of movable means ( 24 , 124 , 230 , 330 , 424 , 538 , 640 ) included in the arrangement and configured to by this movement cut off the arc (a) and/or remove hot ionized gases ( 28 , 128 , 228 , 328 , 428 , 528 , 628 ) required to maintain the arc to prevent the arcing to continue in this feeding line, and
said arrangement comprises an element ( 19 , 119 , 219 , 319 , 419 , 519 , 619 ) of arc and heat resistant material surrounding an extension of the feeding line ( 8 - 10 ) including said position and

Assignees

• Bombardier Transp Gmbh

Inventors

• Andersson Svante

Classifications

• H01H9/30

  Means for extinguishing or preventing arc between current-carrying parts · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B60L58/25

  by controlling the electric load · CPC title

• B60L3/0069 Primary

  relating to the isolation, e.g. ground fault or leak current · CPC title

• B60L2220/14

  Synchronous machines · CPC title