Study of the stepless inductance change using power switch

A new method of stepless inductance change is proposed in this paper based on the use of power switch. The circuit topology and its theoretical analysis are given in detail. The related simulation is performed using the software of MATLAB/sup /spl trade// and PSCAD/EMTDC/sup /spl trade//. Finally, both the actual test results and calculating value are presented, which accords with the simulating results. It is shown from the results that the inductance value can be regulated rapidly and accurately, moreover, the inductance value can be changed according to the requirements for providing necessary detecting signal in the circuits.