Design of continuous micro-control system for flat-top pulsed magnetic field

Wan Hao; Zhang Shaozhe; Liu Qinying; Wei Wenqi; Wang Zhenglei; Han Xiaotao

doi:10.11884/HPLPB202234.210468

Volume 34 Issue 7

May 2022

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Wan Hao, Zhang Shaozhe, Liu Qinying, et al. Design of continuous micro-control system for flat-top pulsed magnetic field[J]. High Power Laser and Particle Beams, 2022, 34: 075013. doi: 10.11884/HPLPB202234.210468

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Wan Hao, Zhang Shaozhe, Liu Qinying, et al. Design of continuous micro-control system for flat-top pulsed magnetic field[J]. High Power Laser and Particle Beams, 2022, 34: 075013. doi: 10.11884/HPLPB202234.210468

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Design of continuous micro-control system for flat-top pulsed magnetic field

doi: 10.11884/HPLPB202234.210468

Wan Hao^{1, 2
,},
Zhang Shaozhe^{1, 2},
Liu Qinying^{1, 2},
Wei Wenqi^{1, 2},
Wang Zhenglei^{1, 2},
Han Xiaotao^{1, 2
,
,}

1.
Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
2.
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China

Received Date: 2021-11-06
Accepted Date: 2022-01-17
Rev Recd Date: 2021-12-31

Available Online: 2022-07-04

Publish Date: 2022-05-12

Abstract

Abstract

Aiming at the problem that the stability of the flat-top pulsed magnetic field generated by open-loop control of capacitor discharge is difficult to meet the requirements of nuclear magnetic resonance, this paper proposes a closed-loop continuous micro-control scheme for the flat-top magnetic field. A compensation coil is placed in the pulse magnet, which is powered by batteries, adopts the strategy of feedforward control and feedback control, uses the IGBT active region to linearly regulate the magnetic field of the compensation coil, compensates for the fluctuation of the background magnetic field, and forms a highly stable flat-top magnetic field. To this end, this paper designs a driving circuit for IGBTs working in the active region, and builds a prototype for experiments. The results show that the method proposed can increase the magnetic field stability to 50×10⁻⁶, which verifies the feasibility of the scheme.
- flat-top pulsed magnetic field,
- nuclear magnetic resonance,
- IGBT active region,
- feedforward control,
- PI control

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References(11)

References

[1]	Liu Qinying, Liu Shiyu, Luo Yongkang, et al. Pulsed-field nuclear magnetic resonance: status and prospects[J]. Matter and Radiation at Extremes, 2021, 6: 024201. doi: 10.1063/5.0040208
[2]	Wu Tao, Mayaffre H, Krämer S, et al. Magnetic-field-induced charge-stripe order in the high-temperature superconductor YBa₂Cu₃O_y[J]. Nature, 2011, 477(7363): 191-194. doi: 10.1038/nature10345
[3]	Goto T, Mori M, Chiba K, Suzuki T, et al. High-field Cu/La-NMR study on high-T_c cuprate La_2-xBa_xCuO₄(x = 0.125)[J]. Physica B:Condensed Matter, 2000, 284/288: 657-658. doi: 10.1016/S0921-4526(99)02322-4
[4]	Rourke P M C, Mouzopoulou I, Xu Xiaofeng, et al. Phase-fluctuating superconductivity in overdoped La_2−xSr_xCuO₄[J]. Nature Physics, 2011, 7(6): 455-458. doi: 10.1038/nphys1945
[5]	Sebastian S E, Harrison N, Palm E, et al. A multi-component Fermi surface in the vortex state of an underdoped high-T_c superconductor[J]. Nature, 2008, 454(7201): 200-203. doi: 10.1038/nature07095
[6]	Jiang Fan, Peng Tao, Xiao Houxiu, et al. Design and test of a ﬂat-top magnetic ﬁeld system driven by capacitor banks[J]. Review of Scientific Instruments, 2014, 85: 045106. doi: 10.1063/1.4870410
[7]	Wang Shuang, Peng Tao, Jiang Fan, et al. Upgrade of the pulsed magnetic field system with flat-top at the WHMFC[J]. IEEE Transactions on Applied Superconductivity, 2020, 30: 4900404.
[8]	Zhang Shaozhe, Wang Zhenglei, Qi Xin, et al. An innovative method for generating high-stability flat-top pulsed magnetic field[C]//Proceedings of 2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC). 2018: 411-415.
[9]	Kohama Y, Kindo K. Generation of flat-top pulsed magnetic fields with feedback control approach[J]. Review of Scientific Instruments, 2015, 86: 104701. doi: 10.1063/1.4931689
[10]	Linder S. Power semiconductors[M]. Lausanne, Switzerland: EPFL Press, 2006.
[11]	Zhang Shaozhe, Wang Zhenglei, Ding Tonghai, et al. Realization of high-stability flat-top pulsed magnetic fields by a bypass circuit of IGBTs in the active region[J]. IEEE Transactions on Power Electronics, 2020, 35(3): 2436-2444. doi: 10.1109/TPEL.2019.2931488