Design of variable-frequency power supply system based on multilevel inverters for dynamic resonant magnetic perturbation coils on J-TEXT tokamak

Author

M. Li;J. Y. Nan;B. Rao;Y. H. Ding;X. K. Ji;Y. Pan

Author_Institution

State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Tecnology, Wuhan, China

fYear

2015

fDate

5/1/2015 12:00:00 AM

Firstpage

1

Lastpage

6

Abstract

The dynamic resonant magnetic perturbation (DRMP) coils have been designed to study the feedback control of tearing mode (TM) instability in J-TEXT tokamak with rotating resonant magnetic perturbation. The AC power supply system energizing coils should have the ability of controlled current frequency in the range of 1 kHz to 5 kHz and amplitude of 5 kA peak value at 5 kHz. In further study, TM will be feedback controlled. In this paper, the main circuit of the variable-frequency power supply system with thyristor rectifier and cascaded H-bridges multilevel inverter is proposed. In order to adapt for the digital feedback control, a fast algorithm to calculate conduction angles of cascaded inverter is emphasized. Experimental results of the main circuit prototype are presented in the end of this paper.

Keywords

"Inverters","Coils","Power supplies","Frequency modulation","Magnetic resonance"

Publisher

ieee

Conference_Titel

Fusion Engineering (SOFE), 2015 IEEE 26th Symposium on

Electronic_ISBN

2155-9953

Type

conf

DOI

10.1109/SOFE.2015.7482400

Filename

7482400