TESTS OF DISK TYPE MAGNETIC-FLUX PUMP WITH THE ABILITY OF HIGH-VOLTAGE OUTPUT

Using a superconducting magnetic flux pump, thick power leads for a su perconducting magnet could be replaced with thin string leads to excit e the excitation magnet of the superconducting flux pump. We have deve loped a new type of flux pump with high-voltage output to shorten the charge and discharge time of-the load magnet. The test of the pump wit h four stacked disks as the exciter for the load magnet has been carri ed out. This disk type flux pump yielded 70 mV of voltage across its t erminal and 10 A of current through a 85 mH load magnet which was the field winding of 20 kVA. class fully superconducting generator within 12 seconds. This output voltage of the new flux pump is about 10 times larger than that of our previous work. Moreover since it is easy to s tack disks for a superconducting flux pump, the high-voltage exciter f or 1 H class superconducting magnet would be expected to be made easil y.