Recent development of beam orbit fast corrector power supply
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摘要:
快校正磁铁电源能够对束流轨道的偏离进行快速校正，提升同步辐射光源运行的可靠性。随着第四代衍射极限储存环（DLSR）光源品质的进一步提高，为了保证束流轨道的稳定性，快速轨道反馈（FOFB）系统对校正磁铁电源的性能也提出了更高的要求。针对先进同步辐射光源FOFB系统对快校正磁铁电源的需求，将目前国内外第四代同步辐射光源束流轨道快速校正磁铁电源的研究成果分为线性电源和开关电源两类，对各方案的拓扑结构、控制策略以及性能参数的特点等进行了简要对比分析，可以看出目前国内外正在研制的快校正磁铁电源响应带宽基本可以达到5 kHz甚至10 kHz水平，线性电源的低纹波噪声特性具备应用优势但需要关注效率低的问题；开关电源方案具有高效、模块化等特点，如果可以有效解决纹波噪声问题，将会更广泛地应用在快校正磁铁电源的设计中。
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关键词:
- 衍射极限同步辐射光源 /
- 轨道反馈 /
- 快校正电源 /
- 线性电源 /
- 开关电源
Abstract:The deviation of the beam orbit can be quickly corrected by the fast corrector power supply, which improves the reliability of the operation of the synchrotron radiation light source. With the further improvement of the quality of the fourth-generation Diffraction-Limited Storage Ring (DLSR) light source, the Fast Orbit FeedBack (FOFB) system places higher requirements on the performance of the corrector power supply to achieve the stability of the beam orbit. In this paper, the current research achievements of beam orbit fast corrector power supply in international fourth-generation synchrotron radiation light sources are divided into two categories: linear power supply and switching power supply. According to the requirements of the FOFB system in the advanced synchrotron radiation light source for the fast corrector power supply, the topology, control strategy and performance parameters of each scheme are briefly compared and analyzed.
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图 1 基于H桥的线性电源系统框图
Figure 1. System block diagram of the linear power supply based on H-bridge
图 2 线性快校正电源样机及其测试结果
Figure 2. Linear power supply of fast corrector and its test results
图 3 基于OPA549的的线性电源样机和频响测试结果
Figure 3. Prototype and frequency response test results of the linear power supply based on OPA549
图 4 4H桥级联多电平逆变器结构及频率响应测试结果
Figure 4. 4H-bridge cascade multi-level inverter structure and frequency response test results
图 5 Buck电路级联的多电平拓扑结构及阶跃响应测试结果
Figure 5. Buck circuits cascade multi-level topology and step response test result
图 6 快校正磁铁电源整体框图和样机
Figure 6. Schematic overview and prototype of extra small power supply
表 1 部分国内外同步辐射光源快校正磁铁电源参数
Table 1. Fast corrector power supply parameters of some synchrotron radiation light sources
institution corrector load/mH current /A bandwidth/103Hz topology/control method HALF 0.8～7 10 5～10 linear and switched-mode/analog and digital SIRIUS 3.5 1 10 linear/digital HEPS 10.59 15 10 switched-mode/digital SLS2.0 62 5 1.5 switched-mode/digital APS-U 16.5 13 10 switched-mode/analog 
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