Characteristic analysis for the design of three-phase ICB circuits

This paper deals with the characteristic analysis for the design of the three-phase ICB (inductor converter bridge) circuit controlled by phase difference. To determine the voltage ratings of capacitors and thyristors, the peak values of voltage across the elements are derived as the functions of related parameters and are analyzed for all the range of phase difference between source-side power converter and load-side power converter. Also, the capacitance of capacitors is estimated and the current rating and turn-off time of thyristors are analyzed. All the results are obtained in consideration of transient switching. Finally, a three-phase ICB circuit is designed as an example. In the example, the system has two superconductive coils with inductance L/sub S/=L/sub L/=L=0.422 H and total stored energy E=0.5 MJ.<>