Multi phase generator arrangement

• US 7,880,350 B2
• Filed: 06/10/2009
• Issued: 02/01/2011
• Est. Priority Date: 06/13/2008
• Status: Expired due to Fees

• Current Assignee: Alstom Technology Ltd. (Alstom SA)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Arndt, Andre, Rajput, Nagib
• Primary Examiner(s): Nguyen; Tran N
• Application Number:
  US12/481,751
• Publication Number:
  US 20090309434A1
• Time in Patent Office: 601 Days
• Field of Search: 310/52, 310 54- 55, 310/71, 310/89
• US Class Current: 310/71
• CPC Class Codes: H02K 2203/09 Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence
• CPC Class Codes: H02K 5/207 with openings in the casing specially adapted for ambient air
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 9/10 by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing

Abstract

A hydrogen cooled generator having an axis and more than three phases, the generator comprises a main casing section enclosing a stator with windings; a casing end section; at least one end winding disposed in the casing end section; a toroidal duct formed on at least one of the casing end section and the main casing section having a bottom wall and two side walls, wherein at least one of the bottom wall and the two side walls shares a wall of the casing end section so as to form a common wall; at least one bushing penetrating the common wall and inclined towards the axis of the generator so as to form an inclination, the at least one bushing having a first end connected to the at least one winding and a second end terminating in the toroidal duct.

Claims

1. A hydrogen cooled generator having an axis and more than three phases, the generator comprising:

a main casing section enclosing a stator with windings;

a casing end section;

at least one end winding disposed in the casing end section;

a toroidal duct formed on at least one of the casing end section and the main casing section having a bottom wall and two side walls, wherein at least one of the bottom wall and the two side walls shares a wall of the casing end section so as to form a common wall;

at least one bushing penetrating the common wall and inclined towards the axis of the generator so as to form an inclination relative to a radial direction of the generator, the at least one bushing having a first end connected to the at least one winding and a second end terminating in the toroidal duct; and

a plurality of phase rings disposed in the toroidal duct, each of the plurality of phase rings having a first end connected to the second end of the at least one bushing, wherein the inclination of the at least one bushing forms a compact radial design so as to enable the toroidal duct to enclose the plurality of phase rings outside of the casing end section.

2. The generator as recited in claim 1, wherein at least a part of the bottom wall shares a wall with the main casing section.

3. The generator as recited in claim 1, wherein the at least one phase ring is air-cooled within the toroidal duct.

4. The generator as recited in claim 1, wherein the at least one bushing includes at least two bushings having second ends disposed in at least two circumferentially different rows.

5. The generator as recited in claim 1, wherein the plurality of phase rings are disposed in a plurality of layers.

6. The generator as recited in claim 1, wherein the plurality of phase rings are disposed in at least one parallel stack.

7. The generator as recited in claim 1, further comprising a cover enclosing the toroidal duct.

8. The generator as recited in claim 1, wherein the casing end section includes a terminal board, and wherein the plurality of phase rings terminates at the terminal board.

9. The generator as recited in claim 1, wherein the at least one bushing is inclined at an inclination angle of at least 30°

from the radial direction of the generator.

10. The generator as recited in claim 9, wherein the inclination angle is less than or equal to 90°

.