针对现有电容器放电开环控制产生的平顶脉冲磁场稳定度难以满足核磁共振要求这一问题，提出一种平顶磁场闭环连续微调控方案。在脉冲磁体中放置一个补偿线圈，其由蓄电池供电，采用前馈控制加反馈控制的策略，利用IGBT有源区对补偿线圈的磁场进行线性调控，补偿背景磁场的波动，形成高稳定度平顶磁场。为此，设计了IGBT工作于有源区的驱动电路，搭建了原型机进行实验，结果表明，该方法能够将磁场稳定度提升至50×10⁻⁶，验证了方案的可行性。

High-magnetic-field nuclear magnetic resonance (NMR) has manifested itself as an indispensable tool in modern scientific research in the fields of physics, chemistry, materials science, biology, and medicine, among others, owing to its great advantages in both measurement sensitivity and quantum controllability. At present, the use of pulsed fields is the only controllable and nondestructive way to generate high magnetic fields of up to 100 T. NMR combined with pulsed fields is therefore considered to have immense potential for application in multiple scientific and technical disciplines. Irrespective of the paramount technical challenges, including short duration of the pulsed fields, unstable plateaus, and poor field homogeneity and reproducibility, great progress has been made in a number of pulsed-field laboratories in Germany, France, and Japan. In this paper, we briefly review the status of the pulsed-field NMR technique, as well as its applications in multiple disciplines. We also discuss future trends with regard to the upgrading of pulsed-field NMR.