CONNECTING SYSTEM FOR CONNECTION OF AN ELECTRIC MACHINE TO A CONVERTER

• US 20140306558A1
• Filed: 04/16/2013
• Published: 10/16/2014
• Est. Priority Date: 04/16/2013
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (GE Aerospace)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Fried, Not-Curdin, Novosel, Damir, Hediger, Daniel, Arndt, Andre, Safari Zadeh, Hossein, Vienne, Gregoire
• Granted Patent: US 9,438,094 B2
• Time in Patent Office: Days
• US Class Current: 310/59
• CPC Class Codes: H02K 3/40 for high voltage, e.g. affording protection against corona discharges
• CPC Class Codes: H02K 47/00 Dynamo-electric converters
• CPC Class Codes: H02K 47/18 AC/AC converters
• CPC Class Codes: H02K 47/20 Motor/generators
• CPC Class Codes: H02K 47/22 Single-armature frequency converters with or without phase-number conversion
• CPC Class Codes: H02K 47/30 Single-armature phase-number converters without frequency conversion
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 9/28 Cooling of commutators, slip-rings or brushes e.g. by ventilating

Abstract

The arrangement of an electric machine, a connecting system and a converter, includes the connecting system connected between the electric machine and the converter. The connecting system has an enclosure that houses non-shielded conductors each non-shielded conductor is connected between a phase of the electric machine and the inner side of the converter. The non-shielded conductors of the connecting system that are connected to an operating phase of the electric machine are adjacent to conductors of the connecting system that are not connected to operating phases of the electric machine.

Claims

1. Arrangement of an electric machine, a connecting system and a converter, wherein

the electric machine has more than three phases

the connecting system is connected between the electric machine and

the converter, the converter has an inner side connected to the connecting system and an outer side, wherein

the connecting system has an enclosure that houses non-shielded conductors , each non-shielded conductor is connected between a phase of the electric machine and the inner side of the converter, wherein

the converter outer side has a number of phases that is different from the number of phases of the electric machine, wherein

a number of phases of the electric machine equal to or greater than the number of phases of the converter outer side operates substantially at the same time, the non-shielded conductors of the connecting system that are connected to an operating phase of the electric machine are adjacent to conductors of the connecting system that are not connected to operating phases of the electric machine.

2. Arrangement according to claim 1, wherein each of the conductors that is connected to a conducting phase of the electric machine is not adjacent to the conductors of the connecting system that are connected to the phases of the electric machine that are electrically shifted zero or one or two steps forward or backward with respect to the other conducting phases of the electric machine.

3. Arrangement according to claim 1, wherein the adjacent conductors are those conductors that are at least partly included in a circular zone with a given radius and centered in the center of the cross section of the conductor.

4. Arrangement according to claim 3, wherein the given radius is such that the losses due to proximity effect are negligible.

5. Arrangement according to claim 1, wherein each moment in time an operating phases of the electric machine is a phase through which a current passes through.

6. Arrangement according to claim 1, wherein the phases of the electric machine that operate substantially at the same time are electrically equidistant from one another.

7. Arrangement according to claim 1, wherein the electric machine is an electric generator.

18. Arrangement according to claim 2, wherein the adjacent conductors are those conductors that are at least partly included in a circular zone with a given radius and centered in the center of the cross section of the conductor.

8. A connecting system for connection of an electric machine to a converter, characterized by comprising an enclosure made of an electrically conductive material that houses a plurality of non-shielded conductors, wherein the non-shielded conductors are preferably more than three.

9. The connecting system of claim 8, wherein the non-shielded conductors have a tubular structure with inlets and and outlets for a cooling gas.

10. The connecting system of claim 9, wherein at least the inlets are defined by apertures in the non-shielded conductors, wherein the apertures open inside of the enclosure.

11. The connecting system of claim 10, wherein the enclosure has at least a chamber that partly houses the conductors, wherein the inlets of the conductors open in the chamber and the outlets open outside of the chamber.

12. The connecting system of claim 11, further comprising a fan or compressor to supply a cooling gas into the chamber.

13. The connecting system of claim 8, wherein the enclosure includes at least a fan or compressor for conveying a cooling gas around the non-shielded conductors.

14. The connecting system of claim 8, further comprising a purge system for the enclosure.

15. The connecting system of claim 8, wherein the enclosure includes walls defining a cooling circuit.

16. The connecting system of claim 15, wherein walls are connected to and extend from the enclosure, wherein the walls have at least a bypass at a zone connected to the enclosure.

17. The connecting system of claim 8, further comprising a heater to heat the inside of the enclosure.

19. The connecting system of claim 14, wherein the enclosure includes walls defining a cooling circuit.