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The rotor winding shape of HTS (High Temperature Superconducting) motor is designed to maximum flux-linkage of stator winging with a given amount of superconductor volume. With the help of three step design procedure of shape design and sizing design, the final optimal rotor winding for easy industrial manufacturing was obtained.

The advantages and shortcomings of shape optimization and topology optimization method are compared for High Temperature Superconducting (HTS) solenoid design. Design results indicate that it is best to use topology optimization method for basic layout design and use shape optimization method for fine-tuning of the basic layout.

The Ni substrate is fabricated by using the powder metallurgy and plasma arc method and the effects of processing variables on the microstructural evolution are investigated. The experimental procedure and test results are discussed.

Two superconducting closed coils are fabricated and the joint resistance of the coils by a field decay technique at 77 K is evaluated. (Bi, Pb)(sub 2)Sr2Ca2Cu3O(sub x)/Ag tape is wound in the form of double-pancake coils, and the ends of the tape are joined to each other by a resistive-joint method.

This paper presents a new shape design sensitivity analysis for the general superconducting system. The proposed method takes into account the nonlinear dependence of the critical current on the maximum magnetic flux density in the sensitivity calculation. The [J.sub.c]-[B.sub.m] curve of the superconducting material is interpolated from the measurement data. The design of a magnetic resonance imaging superconducting solenoid is given as a numerical example. Index Terms--Critical current, design sensitivity, shape optimization, superconducting system.

An innovative design sensitivity analysis procedure with HTS characteristics is employed to increase the maximum critical current of the field winding in a HTS motor.

A new design approach is described which uses the topology optimization method in a superconducting system.

AC loss dependency was studied on joint method in BSCCO-2223 tape, and experimental ac loss was found to agree well with calculated values given by Norris equation.

Jc-B curves of HTS tapes were measured to determine external magnetic fields, and the current density distribution was calculated numerically.

BSCCO jointed tapes were studied to determine electrical properties under resistive and superconducting joint methods.

Experimental results for mono and multifilamentary tapes with regard to current redistribution effects on critical current degradation, are presented.

Twisted Bi(Pb)-Sr-Ca-Cu-O superconductor tape was fabricated and characterized to determine micro-structural evolution and properties.

The electrical and mechanical properties of Bi-2223 superconducting tape were examined to determine the effects of joining processes, and current carrying capacity was found to be reduced in transition areas.

A method to predict critical current of Bi-2223 tape stacked-cables from a Jc-B curve is proposed, including a load line analysis of stacked tapes.