Low loss and compact power supply for superconducting magnet using MERS soft-switching converter

This paper proposes a new circuit configuration for bi-directional magnet power supply. The proposed power supply can handle bi-directional power flow; therefore, can be applied to superconducting magnet, which is usually required to discharge stored energy. The proposed converter is characterized by soft-switching operation and eliminated smoothing capacitor. These features make construction of a large scale magnet power supply easy by using semi-conductor devices without reverse voltage block capability, which are well used in industries. Operation and control principle of this converter, and some experimental results with a small scale model are also described.