Cold structural enclosure for multi-pole rotor having super-conducting field coil windings

• US 20040090139A1
• Filed: 11/13/2002
• Published: 05/13/2004
• Est. Priority Date: 11/13/2002
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Wang, Yu
• Granted Patent: US 6,794,792 B2
• Time in Patent Office: Days
• US Class Current: 310/270
• CPC Class Codes: H02K 55/04 with rotating field windings
• CPC Class Codes: Y02E 40/60 Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Abstract

A rotor for a synchronous machine is disclosed having: a rotor core having a rotor axis; at least one super-conducting coil winding arranged around the rotor core; at least one pair of coil support beams attached to the coil winding and secured to the rotor core, wherein said coil support beams are separated from the rotor core, and a cold coil support cylinder fitted over an outside surface of said beams.

Claims

1. A rotor for a synchronous machine comprising:

a rotor core;

at least one super-conducting coil winding arranged around the rotor core;

at least one pair of coil support beams attached to the coil winding and secured to the rotor core, wherein said coil support beams are separated from said rotor core, and

a coil support cylinder fitted over an outside surface of said beams, wherein said support cylinder is at cryogenic temperatures.

2. A rotor as in claim 1 wherein the at least one super-conducting coil winding is a pair of super-conducting coil windings, each of said coil windings in a respective plane that is parallel to and offset from the rotor axis and positioned in a respective one of the pair of notches on the rotor core.

3. A rotor as in claim 1 wherein the super-conducting coils have a race-track shape.

4. A rotor as in claim 1 wherein the coil support cylinder abuts against outer surfaces of said beams, and a gap exists between an outer surface of the rotor core and the coil support cylinder.

5. A rotor as in claim 1 wherein said coil support beam has an inner slot to receive the coil winding.

6. A rotor as in claim 1 wherein the rotor core is a mounted on a rotor shaft and said core is a cross in cross section.

7. A rotor as in claim 1 wherein the super-conduction coils included a high temperature super-conducting (HTS) wire extending around the entire coil.

8. A rotor as in claim 1 further comprising torque rods extending between adjacent and connecting the coil support beams.

9. A rotor as in claim 2 further comprising torque rods connecting adjacent coil support beams, and each coil support beam is connected to two adjacent coil supports by the torque rods.

10. A rotor as in claim 1 further comprising torque rods connecting adjacent coil support beams, and extending through conduits in the rotor core.

11. A rotor as in claim 2 further comprising torque rods extending between and connecting the coil windings, and wherein said torque rods are perpendicular to the respective planes,of the coils.

12. A rotor as in claim 1 wherein the rotor core is an iron core body.

13. A rotor as in claim 2 further comprising torque rods connecting adjacent coil support beams and extending through conduits in said rotor core, and said torque rods and coil support beams being thermally isolated from said rotor core.

14. A rotor as in claim 1 wherein the coils are saddle coils.

15. A rotor as in claim 1 wherein the coil winding, support beams and support cylinder are maintained at cryogenically cold temperatures, and the rotor core is maintained at an ambient hot temperature.

16. A rotor for a synchronous machine comprising:

a rotor core having a rotor axis;

at least one super-conducting coil winding mounted on the rotor core and having end sections extending beyond the rotor core;

at least one pair of coil support beams having an inner slot support the coil winding, said beams symmetrically arranged around the core, and said beams separated by a gap from said core, wherein said outer support beams have outer surfaces radially outward of outer surfaces of the rotor core;

a plurality of torque rods spanning and connecting opposite coil support beams, wherein said torque rods are offset from and symmetrically arranged about an axis of the rotor.

17. A rotor as in claim 16 further comprising a cylindrical support cylinder surrounding the coil support beams.

18. A rotor as in claim 16 wherein the coil winding, support beams and support cylinder are maintained at cryogenically cold temperatures, and the rotor core is maintained at an ambient hot temperature.