27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Design of a hybrid power supply for the 65 T high-stability flat-top pulsed magnetic field

28 Aug 2017, 13:15
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m H2 - Power Supplies and Flux Pumps Mon-Af-Po1.12

Speaker

Yongheng Huang (Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology)

Description

With the increasing applications in physics, biology, chemistry and many other basic scientific fields, high-stability flat-top pulsed magnetic field is demanded for a higher field intensity and a lower ripple. To meet this demands, this paper proposes a hybrid power supply to generate a high-stability flat-top pulsed magnetic field at the Wuhan National High Magnetic Field Center. The hybrid power supply which is adopted to energize a dual-coil magnet, consists of an 11 MJ/25 kV capacitor power supply and a 100 MVA generator-rectifier power supply. A coupling transformer is adopted in the circuit to compensate the influence of the mutual coupling between the two coils. To protect the system from the damage of a short circuit fault occurring between the first turns of the inner coil and outer coil, which will produce oscillation voltage with a high peak value and high frequency (45 kV and 776.6 kHz) on the rectifiers, a protection circuit consists of an R-C branch, a diode array and a metal-oxide arrester is presented. The self-adaptive PI controller with the coefficients corrected by back propagation neural network is adopted to reduce the ripple of flat-top. The MATLAB/SIMULINK is used to model and simulate the proposed system, and a 65 T/100 ms high magnetic field with a ripple less than 160 ppm is generated. Acknowledgements: The National key research and development program of China (2016YFA0401702) and the Program for New Century Excellent Talents in University.

Submitters Country China

Primary authors

Hongfa Ding (Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology) Yongheng Huang (Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology) Jun Zhou (Huazhong University of Science and Technology) Zhangfei Zhao (Wuhan National High Magnetic Field Center Huazhong University of Science and Technology) Dr Tieqiang Ren (Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology) Yiliang Lv Dr Huan Li (Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology)

Presentation Materials