Multi phase generator with frequency adaptation unit

• US 8,049,377 B2
• Filed: 06/10/2009
• Issued: 11/01/2011
• 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, Joho, Reinhard
• Primary Examiner(s): NGUYEN, TRAN N
• Application Number:
  US12/481,731
• Publication Number:
  US 20090309433A1
• Time in Patent Office: 874 Days
• Field of Search: 310/52, 310 54- 55, 310/68.R, 310/68.D, 310/89, 310/270
• US Class Current: 310/54
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02K 9/28 Cooling of commutators, slip-rings or brushes e.g. by ventilating

Abstract

A hydrogen cooled generator having an axis and a plurality of phases 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; and at least one bushing penetrating the common wall and inclined towards the axis of the generator, the at least one bushing having a first end connected to the at least one end winding and a second end terminating in the toroidal duct.

Claims

1. A hydrogen cooled generator having an axis and a plurality of phases, the plurality of phases including 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 of the stator windings disposed in the casing end section;

a toroidal duct 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, the at least one bushing having a first end connected to the at least one end winding and a second end terminating in the toroidal duct;

a frequency adaptation unit disposed in the toroidal duct, including at least one rectifier portion having an input end connected to the second end of a respective one of the at least one bushing; and

a positive polarity collection ring and a negative polarity collection ring, each ring being connected to an output end of a respective one of the at least one rectifier portion, wherein the at least one rectifier portion forms a rectifying bridge between the plurality of phases and the positive and the negative polarity collection rings,

further comprising a cooling water system configured to water-cool the at least one rectifier portion within the toroidal duct.

2. The generator as recited in claim 1, wherein the at least one bushing inclines towards the casing main section.

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

4. The generator as recited in claim 1, wherein the at least one rectifier portion includes a series of connected semiconductors.

9. The generator recited in claim 1, wherein the cooling water system includes a supply pipe and a return pipe disposed in the toroidal duct.

10. The generator recited in claim 9, wherein the cooling water system includes a manifold connected to each of the at least one rectifier portion, the supply pipe and the return pipe.

11. The generator recited in claim 9, wherein the cooling water system is configured to cool at least one of the walls of the toroidal duct.

5. A hydrogen cooled generator having an axis and a plurality of phases, the plurality of phases including 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 of the stator windings disposed in the casing end section;

a toroidal duct 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 wail and inclined towards the axis of the generator, the at least one bushing having, a first end connected to the at least one end winding, and a second end terminating, in the toroidal duct;

a frequency adaptation unit disposed in the toroidal duct including at least one rectifier portion having an input end connected to the second end of a respective one of the at least one bushing;

a positive polarity collection ring and a negative polarity collection ring, each ring being connected to an output end of a respective one of the at least one rectifier portion, wherein the at least one rectifier portion forms a rectifying bridge between the plurality of phases and the positive and the negative polarity collection rings; and

a cover covering the toroidal duct and having at least one opening through which cooling air is configured to flow into the toroidal duct so as to provide air cooling within the toroidal duct.

6. The generator recited in claim 5, wherein a majority of the toroidal duct is closed, and wherein the at least one opening in the cover includes a single opening configured to pass forced cooling air into the toroidal duct.

7. The generator recited in claim 6, wherein the forced cooling air is generated by a fan.

8. The generator recited in claim 6, further comprising a fan configured to force cooling air through the single opening in the cover into the toroidal duct.