Device for inductive current limiting of an alternating current employing the superconductivity of a ceramic high-temperature superconductor

A high power inductive current limiter, comprising:

• a first body made of a soft magnetic material of high permeability, said first body having at least a cylindrical part with an outer diameter;
• a second hollow cylindrical body made of a ceramic high temperature superconducting material, said second body having a wall thickness which is at least 2 mm, and an inner diameter which is greater than said outer diameter of said cylindrical part of said first body, and said second body surrounding said cylindrical part of said first body;
• and
• an induction coil with at least one winding, said induction coil being wound on said second body;
• wherein said current limiter is a two-terminal device having first and second terminals, said induction coil having first and second ends respectively connected to said first and second terminals.

A high power inductive current limiter, comprising:

• a first body made of a soft magnetic material of high permeability, said first body having at least a cylindrical part with an outer diameter;
• a second hollow cylindrical body made of a ceramic high temperature superconducting material which comprises one of the group consisting of
• SEBa.sub.2 Cu.sub.3 O.sub.6.5+y, where SE is a rare early metal and O<y<1;
• (La,Ba,Sr).sub.2 CuO.sub.4 ;
• Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8 ;
• and
• Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10 ;
• said second body having a wall thickness which is at least 2 mm, and an inner diameter which is greater than said outer diameter of said cylindrical part of said first body, and said second body surrounding said cylindrical part of said first body;
• and
• an induction coil with at least one winding, said induction coil being wound on said second body;
• wherein said current limiter is a two-terminal device having first and second terminals, said induction coil having first and second ends respectively connected to said first and second terminals.