Composite conductor, superconductive apparatus system, and composite conductor manufacturing method

• US 20060021788A1
• Filed: 11/24/2004
• Published: 02/02/2006
• Est. Priority Date: 11/28/2003
• Status: Active Grant

• Current Assignee: Chubu Electric Power Company Incorporated, Dowa Electronics Materials Co. Ltd. (DOWA Holdings Company Limited)
• Original Assignee: Chubu Electric Power Company Incorporated, Dowa Mining Company Limited
• Inventors: Nagaya, Shigeo, Kashima, Naoji, Kohayashi, Shuichi, Uemura, Kazuyuki
• Granted Patent: US 7,319,195 B2
• Time in Patent Office: Days
• US Class Current: 174/125.100
• CPC Class Codes: H01F 6/065 Feed-through bushings, terminals and joints leading of conductors or axles through casings of transformers H01F27/04
• CPC Class Codes: H01R 4/68 Connections to or between superconductive connectors
• CPC Class Codes: H10N 60/80 Constructional details
• CPC Class Codes: Y10S 505/886 Cable
• CPC Class Codes: Y10S 505/887 Conductor structure
• CPC Class Codes: Y10T 29/49014 Superconductor

Abstract

To provide a composite conductor suitable as a connecting conductor capable of reducing generation of Joule heat in a joint part between a conductor on a system side and a conductor on a power-supply side, while using a superconductor with less thermal invasion to a superconductive apparatus system.

A composite conductor 10 comprises a superconductor 12 provided continuously in the flowing direction of the electric current, and a metal conductor 11 joined with the superconductor 12 and provided at least at a joint part with mating conductors 50, 60 to be joined, wherein the electric current is fed and received between the metal conductor 11 and the mating conductors 50, 60 by joining the metal conductor 11 and the mating conductors 50, 60, and wherein the superconductor 12 is arranged in the metal conductor 11 so as to be approximately parallel to the joint surface (joint interface) between the metal conductor 11 and the mating conductors 50, 60.

Claims

1. A composite conductor, comprising:

a superconductor provided in a current flowing direction; and

a metal conductor joined to said superconductor and provided at least in a joint part with mating conductors to be joined,

wherein an electric current is fed and received when the mating conductor is joined with said metal conductor, and

wherein said superconductor is disposed in said metal conductor so as to be approximately parallel to the joint interface between said metal conductor and the mating conductor.

2. The composite conductor according to claim 1,

wherein said superconductor is formed in an almost columnar shape, and disposed so that the longitudinal direction thereof is approximately parallel to the joint interface.

3. The composite conductor according to claim 1,

wherein said superconductor is an oxide superconductor formed by a melting method.

4. The composite conductor according to claim 1,

wherein said superconductor is formed by joining a plurality of conductors.

5. A composite conductor according to claim 1,

wherein said metal conductor and said superconductor are joined by interposing a jointing metal therebetween, and

wherein volume of pores present in the jointing metal occupies not more than 5% of the volume of a gap at the joint part.

6. A superconductor apparatus system using the composite conductor according to claim 1.

8. The composite conductor according to claim 2,

wherein said superconductor is an oxide superconductor formed by a melting method.

9. The composite conductor according to claim 2,

wherein said superconductor is formed by joining a plurality of conductors.

10. The composite conductor according to claim 3,

wherein said superconductor is formed by joining a plurality of conductors.

11. A composite conductor according to claim 2,

wherein said metal conductor and said superconductor are joined by interposing a jointing metal therebetween, and

wherein volume of pores present in the jointing metal occupies not more than 5% of the volume of a gap at the joint part.

12. A composite conductor according to claim 3,

wherein said metal conductor and said superconductor are joined by interposing a jointing metal therebetween, and

wherein volume of pores present in the jointing metal occupies not more than 5% of the volume of a gap at the joint part.

13. A composite conductor according to claim 4,

wherein said metal conductor and said superconductor are joined by interposing a jointing metal therebetween, and

wherein volume of pores present in the jointing metal occupies not more than 5% of the volume of a gap at the joint part.

14. A superconductor apparatus system using the composite conductor according to claim 2.

15. A superconductor apparatus system using the composite conductor according to claim 3.

16. A superconductor apparatus system using the composite conductor according to claim 4.

17. A superconductor apparatus system using the composite conductor according to claim 5.

7. A manufacturing method of a composite conductor comprising a superconductor provided in a flowing direction of an electric current, and a metal conductor joined with said superconductor and provided at least in a joint part with a mating conductor to be joined, wherein the electric current is fed and received between said metal conductor and the mating conductor when the mating conductor is joined with said metal conductor, the method of manufacturing the composite conductor comprising:

heating the joint part at or above a melting point of the jointing metal; and

reducing the pressure to degas the jointing metal when the oxide superconductor and the metal electrode are joined with each other by the jointing metal.