Design of passive filter for magnet power supply based on chopper control

Yonggao Zhang; Weiwei Yang; Peng Liu; Yinquan Yu; Weijun Shen

doi:10.1117/12.2619957

29 November 2021 Design of passive filter for magnet power supply based on chopper control

Yonggao Zhang, Weiwei Yang, Peng Liu, Yinquan Yu, Weijun Shen

Proceedings Volume 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021); 120803D (2021) https://doi.org/10.1117/12.2619957
Event: 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 2021, Nanchang, China

Abstract

The switching harmonics generated by the on-off and off of the switching tube of the chopper-controlled magnet power supply will affect the control accuracy of the magnet power supply for the particle beam current. The switching harmonics are mainly concentrated near the switching frequency and its sideband. In order to effectively suppress the switching frequency and sideband harmonics, three passive filters are studied. The three passive filters are based on BUCK buck circuit, and the harmonic bypass effect of switching frequency and sideband frequency is achieved by low-pass filtering and series resonance, thereby reducing the amplitude of load current ripple. The simulation results show that the designed three passive filters have good suppression effects on the switching frequency and sideband harmonics.

Citation Download Citation

Yonggao Zhang, Weiwei Yang, Peng Liu, Yinquan Yu, and Weijun Shen "Design of passive filter for magnet power supply based on chopper control", Proc. SPIE 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 120803D (29 November 2021); https://doi.org/10.1117/12.2619957

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