STATOR OF A TURBO GENERATOR

• US 20090322168A1
• Filed: 07/16/2007
• Published: 12/31/2009
• Est. Priority Date: 07/14/2006
• Status: Active Grant

• Current Assignee: Ansaldo Energia SPA
• Original Assignee: Ansaldo Energia SPA
• Inventors: Garello, Roberto
• Granted Patent: US 8,072,102 B2
• Time in Patent Office: Days
• US Class Current: 310/71
• CPC Class Codes: H02K 2203/06 Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24
• CPC Class Codes: H02K 9/26 Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters

Abstract

A stator of a turbo generator for the generation of electrical energy is provided with: a cylindrical core, which extends along a longitudinal axis and presents a plurality of axial cavities and two opposite headers; connection terminals of the turbo generator; a plurality of electrical windings, which are split into groups and which extend along paths defined in part in the axial cavities and in part at the headers; the electrical windings of each group being isopotential and connected in parallel between a pair of terminals; and a plurality of connection devices, each of which is adapted to define, at least at one of the headers, a segment of path in common with the isopotential electrical windings.

Claims

1. A stator (3) of a turbo generator (1), comprises:

a cylindrical core (4), which extends along a longitudinal axis (A) and comprises a plurality of axial cavities (7) and two opposite headers (6);

connection terminals (8) of the turbo generator (1);

a plurality of electrical windings (5), which are split into groups and which extend along paths defined in part in the axial cavities (7) and in part at the headers (6);

the electrical windings (5) of each group being isopotential and connected in parallel between a pair of terminals (8);

the stator (3) being characterised by comprising a plurality of connection devices (11, 13), each of which is adapted to define, at least at one of the headers (6), a segment of path in common with the isopotential electrical windings (5).

2. A stator according to claim 1, characterised in that said connection devices (11, 13) comprise terminal connection devices (11), each of which is connected to a terminal (8) and defines a segment in common to the isopotential electrical windings (5) of a group.

3. A stator according to claim 1, characterised in that said connection devices (11, 13) comprise intermediate connection devices (13), each of which defines a segment in common to isopotential electrical windings (5) of a group and are arranged in a median portion of the isopotential electrical windings (5).

4. A stator according to claim 1, characterised in that each electrical winding (5) comprises in sequence a first terminal connection device (11);

a first conducting bar (12);

an intermediate connection device (13);

a second bar (12); and

a second terminal connection device (13).

5. A stator according to claim 1, characterised in that each connection device (11;

13) comprises a hollow conductor (14;

18).

6. A stator according to claim 5, characterised in that said hollow conductor (14;

18) is connected to a suction tube (17) adapted to ventilate said hollow conductor (14;

18).

7. A stator according to claim 5, characterised in that said hollowing conductor (14;

18) presents at least one end provided with a suction filter (15).

8. A stator according to claim 7, characterised in that said suction filter (15) comprises a tube (25) enclosed in a perforated plate (26).

9. A stator according to claim 5, characterised in that said connection device (11, 13) comprises at least one connector (16) adapted to connect the hollow conductor (14;

18) to at least two bars (12).

10. A stator according to claim 9, characterised in that the connector (16) comprises an elongated body (19) provided with a hole (21) adapted to be engaged by said hollow conductor (14;

18) and at least two fins (20) each of which is adapted to be brazed to a corresponding bar (12).

11. A stator according to claim 10, characterised in that the connector (16) comprises a first insulating shell (28) arranged about the elongated body (19) and the fins (20).

12. A stator according to claim 11, characterised in that the connector (16) comprises a second shell (29) arranged about the first shell (28).

13. A stator according to claim 10, characterised in that said elongated body (19) presents a slot (23) which extends between the hole (21) and the fins (20).

14. A stator according to claim 5, characterised in that said intermediate connection device (13) comprises two connectors (16) arranged on the two opposite ends of the hollow connector (18).

15. A stator according to claim 14, characterised in that said connection device (13) comprises two filters (15) arranged on the opposite ends of the hollow connector (18).

16. A stator according to claim 15, characterised in that it comprises a suction tube (17) connected to the hollow conductor (18) at the middle line of the hollow conductor (18).