Machinery windings of yttrium barium copper oxide and related coated conductor

• US 7,566,684 B1
• Filed: 08/24/2006
• Issued: 07/28/2009
• Est. Priority Date: 08/24/2006
• Status: Expired due to Fees

• Current Assignee: The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Inventors: Levin, George A., Barnes, Paul N.
• Primary Examiner(s): Group; Karl E
• Assistant Examiner(s): Wiese; Noah S
• Application Number:
  US11/513,400
• Time in Patent Office: 1,069 Days
• Field of Search: 505/430, 505/433, 505/150, 505/739, 505/230, 505/211, 295/99, 296/00, 296/06, 361/29, 361/43, 427/116, 427/62
• US Class Current: 505/430
• CPC Class Codes: H01F 6/06 Coils, e.g. winding, insulating, terminating or casing arrangements therefor
• CPC Class Codes: Y10S 505/739 Molding, coating, shaping, or casting of superconducting material
• CPC Class Codes: Y10T 29/49014 Superconductor
• CPC Class Codes: Y10T 29/49073 by assembling coil and core

Abstract

A superconductor coating inclusive, tape-like electrical conductor and windings using such conductor for magnets and electrical machines, etc. The described windings are suited for inclusion of successor superconductor materials such as yttrium barium copper oxide wherein magnetic flux related losses can potentially be excessive and preclude successful machine operation. Winding orientation and configuration of the conductor in an alternating current machine for lower losses are disclosed along with methods and apparatus for achieving the desired windings. Windings intended for differing locations within a machine of this type are made possible by the invention. Equations relating to magnetic losses incurred in such windings are also disclosed.

Claims

1. A method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding, said method comprising the steps of:

dividing a planar sheet of high temperature superconductor film coated electrical conductor material into segregated lengths of tape conductor having conductor interconnecting regions located at one end of each tape conductor,

said conductor dividing step forming an extended connected meander-like pattern of tape conductors in said sheet of high temperature superconductor film coated electrical conductor material; and

forming said divided pattern tape conductors into axially segregated multiple turned continuous electrical winding coils wherein each said conductor interconnecting region comprising a portion of said coil includes a length of said high temperature superconductor coated tape conductor.

2. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 wherein said step of forming said divided pattern tape conductors into axially segregated multiple turned continuous electrical winding coils includes disposing said interconnected conductors into a cusp like relationship and forming electrical winding coils on opposed sides of said cusp like conductor relationship in opposed rotational directions.

3. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 wherein each said conductor interconnecting region comprises a planar portion of said planar sheet of high temperature superconductor film coated electrical conductor material.

4. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 further including the step of adding a supplemental conductor element to said planar sheet of high temperature superconductor film coated electrical conductor tape elements in joining said conductor interconnecting regions.

5. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 further including the step of disposing said continuous electrical winding coils into a concentric spiral of winding turns.

6. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 further including the step of disposing said continuous electrical winding coils into one of a solenoid coil and a layered coil.

7. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 wherein said continuous electrical winding coils comprise a portion of a multiple phased electrical winding set.

8. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 further including the step of disposing a twist pattern along a lengthwise axis of said tape conductor.

9. The method of fabricating a high temperature superconductor film layer inclusive multiple turn, multiple coil electrical winding of claim 1 further including the step of dividing said sheet of high temperature superconductor film coated electrical conductor material into electrically segregated conductor striations conforming with said segregated lengths of tape conductor and said connected meander-like pattern.

10. A method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine, said method comprising the steps of:

disposing a complementing meander of conductor voids in a planar sheet of yttrium barium copper oxide superconductor coated electrical conductor material;

said conductor void meander forming an extended connected capital letter U-like pattern of tape conductor in said sheet of yttrium barium copper oxide superconductor coated electrical conductor material;

unfolding said meander pattern of tape conductor from said planar sheet configuration to form a length of tape conductor having curvilinear length portions segregated by bending twist regions intermediately disposed therein; and

forming said unfolded meander pattern tape conductor into a multiple turned continuous spiral electrical winding coil.

11. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an alternating current electrical machine of claim 10 wherein said curvilinear length portions comprise magnetic pole conductor active regions and said bending twist regions comprise conductor active region interconnections in said electrical winding coil.

12. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine of claim 11 wherein said bending twist regions are located in a plane differing from that of said conductor active regions in said electrical winding coil.

13. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine of claim 10 wherein said tape conductor bending twist regions are located in a plane radially disposed with respect to said conductor active regions in said electrical machine winding.

14. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine of claim 10 wherein said machine is an alternating current electrical machine and further including the step of forming an array electrically isolated striation filament electrical paths conforming with said meander pattern in said planar sheet of yttrium barium copper oxide superconductor coated electrical conductor material.

15. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine of claim 10 wherein said step of forming said unfolded meander pattern tape conductor into a multiple turned continuous spiral electrical winding coil includes fabricating said electrical winding coil on a winding form having a first periphery portion shaping said magnetic pole conductor active regions and a second recessed portion receiving said meander pattern conductor bending twist regions.

16. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine of claim 10 further including the step of disposing said winding in an electrical machine magnetic circuit structure in an orientation minimizing magnetic field components disposed perpendicular to a lateral face portion of said tape conductor.

17. The method of fabricating a low loss high temperature superconductor coating inclusive winding for an electrical machine of claim 10 wherein said electrical winding is a portion of a multiple phase electrical winding set.