×

Method of preloading superconducting coils by using materials with different thermal expansion coefficients

  • US 5,187,859 A
  • Filed: 08/23/1990
  • Issued: 02/23/1993
  • Est. Priority Date: 08/23/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of manufacturing a superconducting coil, comprising the steps of:

  • surrounding wire which becomes superconducting upon subsequent heating with a first reinforcing material with a thermal expansion rate;

    surrounding the wire and first reinforcing material with electrical insulation;

    winding the wire surrounded by first reinforcing material and electrical insulation on a winding means thereby providing a first plurality of layers with an outer layer;

    winding a cable of a second reinforcing material, with a thermal expansion rate greater than the thermal expansion rate of the first reinforcing material, around the outer layer of the first plurality of layers so that a first layer of the cable of the second reinforcing material is formed around the first plurality of layers;

    winding a layer of the wire surrounded by first reinforcing material and electrical insulation around the first layer of cable of the second reinforcing material;

    winding a second layer of the second reinforcing material around the layer of wire around the first layer of cable of the second reinforcing material;

    whereby a coil is formed;

    heating the coil to a temperature greater than 300°

    C. thereby making the wire superconducting; and

    cooling the coil to a temperature equal to or less than room temperature;

    whereby the coil is radially preloaded.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×