电子加速器通过对电磁场精细调整使得电子束按理想轨道运行, 要求励磁电源电流精度高、稳定度高、纹波小、抗干扰能力强。介绍了合肥光源小功率直流磁铁电源系统结构和控制器系统及控制算法, 并进行了仿真和实验研究。实验测得, 在负载电感1 mH、等效串联电阻0.049 Ω, 输出电流25 A下电流纹波率2.12, 40 min电流稳定度6.6, 电流分辨率0.01‰。这表明: 所设计的主电路和控制器系统适用于小功率直流磁铁电源的实验研究。

Electron accelerators adjust electromagnetic field to guide the electron beam to travel along an ideal orbit, requiring reliable excitation power supply with high precision, high reliability, small ripple and strong anti-interference ability. This paper introduces the structure,controller system and control algorithm of NSRL-HLS low power DC magnet power supply, as well as some relative simulation and experiment research. The measured current ripple is 2.12, the current stability is 6.6 and the current resolution is 0.01‰ under the load inductance 1.0 mH, equivalent series resistance 0.049 Ω and output current 25 A. It is proved that the designed main circuit and controller system are suitable for the experimental research of low power DC magnet power supply.