并联交错PFC技术在磁体电源中的应用

并联交错功率因数校正(powerfactorcorrection,PFC)具有能减小输入电流纹波,减小电感磁芯尺寸,减小输出电容纹波、功率因数高等优点．针对其优点,考虑将该变换器应用到强磁场中心的超导磁体电源的备用方案中,以弥补现在运行电源体积过大的不足．本文主要介绍了并联交错PFC的工作原理,对其参数进行设计和选型,分析了控制方法,利用SiC器件,搭建了１kW 的实验样机,实验验证了方案的可行性,为下一步超导磁体电源的升级改造提供了理论和工程经验。

Application of Parallel Staggered PFC Technology in Magnet Power Supply

Parallel PFC can reduce the input current ripple, reduce the size of the inductor core, reduce the output capacitor ripple, and has high power factor. For its advantages, consider applying this converter to a backup scheme of a superconducting magnet power source with a strong magnetic field center, so as to make up for the deficiency of the current operating power volume being too large. In this paper, the working principle of parallel staggered PFC is introduced. The parameters are designed and selected, the control method is analyzed, using SiC devices and a 1kW experimental prototype is built. The feasibility of the scheme is verified by experiments, which provides theoretical and engineering experience for the upgrade of the superconducting magnet power supply in the next step.