Feedback Control of a Rectifier Type HTS Flux Pump: Stabilizing Load Current With Minimized Losses

Flux pumps are able to compensate slow current decay in high-
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superconducting (HTS) magnets through noncontact approaches. It is a promising alternative for power sources and thick current leads in operating HTS coils. Following the previous work of a rectifier flux pump, we developed a feedback control system to achieve flexible control of load current. Experimental results show that the flux pump can stabilize load current at a preset level with the help of the control system. Power loss of using the flux pump is also compared with that of using current leads.