Speaker
Description
Abstract—Magnetic compression (MC) technology was suggested for tokamak to study compressed plasma in [Li, G., Scientific reports, 2015, 5] and a power module is designed here for developing its server power supplier. The minor-radius compression is one of the most effective method to improve the performance parameters of existing tokamaks, enabling the plasmas operated at high density, high temperature and high beta. In this paper, a high frequency and high power AC/Pulse converter is proposed, used for powering coils of minor-radius magnetic compression within vacuum chamber of the experimental advanced superconducting tokamak (EAST). The basic of the power module is a AC/Pulse converter of buck type, implemented by full-bridge phase-shift circuit and controlled by pulse-width-modulated (PWM). Also, control method adopts current closed loop Proportional-Integral (PI) control, has less than 1 ms current response time in real time. The converter is analyzed and the design procedure is discussed. Experimental results obtained from a 3kA converter prototype are presented to validate the converter’s performance with the re-designed control board.
Keywords—magnetic compression; phase-shift PWM; AC/Pulse converters; tokamaks; fusion plasma; Lawson trinity parameter.
References
1.Li, G. High-Gain High-Field Fusion Plasma. Sci. Rep. 5, 15790; doi: 10.1038/srep15790 (2015).
| Eligible for student paper award? | No |
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