Abstract
New power supply for superconductor is proposed. The conventional power supply is consisted of a transformer and thyristors. The present power supply does not the large current transformer but only the switching devices to achieve the DC current amplification.
The principle of new power supply is AC-DC-AC-DC conversion. The AC line is once rectified to small current of DC and next converted to large current of DC through switching device handling AC.
On a test set, 800A of superconducting current has been obtained with 50A input DC current.
The conceptual design of power supply for 20kA has been done. The characterisitc features of the new power supply have been compared with the conventional one.
