Performances of a Linear Type Magnetic Flux Pump for Compensating a Little Decremented Persistent Current of HTS Magnets

Abstract

This paper describes the characteristics of a linear type magnetic flux pump recently developed. The linear type flux pump has been fabricated to apply to compensate decremented persistent current of HTS applications such as NMR and MRI system. The linear type magnetic flux pump mainly consists of 3-phase AC armature coil, DC bias coil and superconducting Nb foil. In the preliminary experiment, the flux pump can charge the pumping-up current in the load coil of 1.3 mH during 1000 seconds under the DC bias current of 10 A and 3-phase AC of 8 A, 60 Hz. The magnitude of pumping current is 0.1 mA/s. Index Terms-Linear type magnetic flux pump, Nb foil, persistent current compensation.

Superconducting magnetic resonance imaging: Supply, diagnostics, and protection

“…Topological generators received new impetus as precision direct current sources in connection with the development of MRIs based on HTSC [7][8][9][10].…”

Current Pumping Performance of Linear-Type Magnetic Flux Pump With Use of Feedback Control Circuit System

“…The operating characteristics of LTMFP have already been investigated under various conditions. Moreover, it has been observed that the current pumping of the LTMFP can be controlled by frequency of the 3-phase inverter [5], [6].…”