Jiang Shan, Hu Heng, Wang Shuang, Li Liang, Peng Tao
Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, 430074 Wuhan, China.
Rev Sci Instrum. 2021 Nov 1;92(11):114708. doi: 10.1063/5.0059685.
A system based on a novel scheme for generating the repetitive pulsed high magnetic field (RPHMF) is developed and applied to enhance the performance of the NdFeB electrocatalyst in alkaline water electrolysis for the first time. In this system, the scheme for generating continuously high-frequency pulses depends on the cooperation of multiple power modules with a new structure. Multiple power modules are connected in parallel to energize the pulsed magnet, and each module is composed of two capacitor banks and a pulse transformer, which is used to realize the conversion of the energy between the two capacitor banks. As the residual energy in one capacitor is transferred to another, the energy required to be replenished for the next pulse reduces substantially. Then, the high repetition rate of the RPHMF can be achieved by discharging the capacitor banks of each module in sequence. The scheme has been validated by the experiment of a 2.4 T/12 Hz prototype with only one power module. Simulation shows that the frequency of the RPHMF can be improved to 12N Hz with N power modules, and a higher repetition rate of the RPHMF may bring new opportunities to the water electrolysis.
首次开发了一种基于新型方案的产生重复脉冲强磁场（RPHMF）的系统，并将其应用于提高钕铁硼电催化剂在碱性水电解中的性能。在该系统中，产生连续高频脉冲的方案依赖于具有新结构的多个功率模块的协同工作。多个功率模块并联连接以向脉冲磁体供电，每个模块由两个电容器组和一个脉冲变压器组成，脉冲变压器用于实现两个电容器组之间的能量转换。当一个电容器中的剩余能量转移到另一个电容器时，下一个脉冲所需补充的能量大幅减少。然后，通过依次对每个模块的电容器组放电，可以实现RPHMF的高重复率。该方案已通过仅一个功率模块的2.4 T/12 Hz原型实验得到验证。模拟表明，使用N个功率模块时，RPHMF的频率可提高到12N Hz，并且更高的RPHMF重复率可能会给水电解带来新机遇。
