开关线性混电源设计

周宁; 詹荣霖; 燕宏斌; 张华剑; 李继强; 王晓俊; 高大庆; 郭宏亮; 谭玉莲

doi:10.11884/HPLPB202537.240435

开关线性混电源设计

doi: 10.11884/HPLPB202537.240435

周宁^{1, 2,},
詹荣霖^{1, 2},
燕宏斌¹,
张华剑¹,
李继强¹,
王晓俊¹,
高大庆^1, ,,
郭宏亮¹,
谭玉莲¹

1.
中国科学院近代物理研究所，兰州 730000
2.
中国科学院大学核科学与技术学院，北京 100049

基金项目: 国家自然科学基金青年科学基金项目（E411571GJ0）

详细信息

作者简介:
周　宁，zhouning@impcas.ac.cn

通讯作者:
高大庆，gaodq@impcas.ac.cn。

中图分类号: TL503.5
计量
- 文章访问数: 39
- HTML全文浏览量: 24
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2024-12-20
- 修回日期: 2025-05-08
- 录用日期: 2025-05-08
- 网络出版日期: 2025-05-23

Design of switched-linear power supply

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 随着粒子加速器物理实验的深入研究，对束流质量的要求逐渐提高。为获得极高稳定度和极低噪声的磁场环境，分析设计了开关模式和线性模式结合的高精度直流励磁电源。前级开关电源提供稳定的功率来源，串联后级线性电源控制电流线性放大后进行输出。在电源电流和管压降控制环路基础上，通过对关键部件的温度补偿措施，进一步提高了输出电流的稳定度；通过对后级线性电源的模块化设计，减小了电源体积并提高了运维便利性。实测结果表明：8 h长期电流稳定度达到1.3×10⁻⁶，且噪声极低。
- 加速器电源 /
- 极高稳定度 /
- 线性放大 /
- 温度补偿 /
- 模块化
Abstract: With the in-depth study of particle accelerator physics experiments, the requirements higher for beam quality have gradually increased. To obtain a magnetic field environment with extremely high stability and extremely low noise, a high-precision DC excitation power supply combining switching mode and linear mode was analyzed and designed. The front-end switching power supply provides a stable power source, and the back-end linear power supply is connected in series to control the linear amplification of the current for output. Based on the control loop of power supply current and tube voltage drop, the stability of the output current has been further improved through temperature compensation measures for key components. Through the modular design of the back-end linear power supply, the volume of the power supply has been reduced and the convenience of operation and maintenance has been improved. The measured results show that the long-term current stability for 8 h reaches 1.3×10⁻⁶, and the noise is extremely low.
- accelerator power supply /
- extremely high stability /
- linear amplification /
- temperature compensation /
- modularization

HTML全文

图 1 开关线性混合电源原理图

Figure 1. Schematic diagram of switched-linear power supply

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图 2 开关线性混合电源控制原理

Figure 2. Control strategy of switched-linear power supply

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图 3 环境温度变化对输出电流的影响

Figure 3. Influence of ambient temperature variations on output current

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图 4 温度控制电路原理

Figure 4. Scheme of temperature control circuit

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图 5 恒温装置和加入温度补偿后的DAC输出曲线

Figure 5. Constant temperature device and the DAC output curve after adding temperature compensation

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图 6 新旧线性电源模块对比和新结构模块的安装效果

Figure 6. Comparison of old and modified structure of water-cooled radiator and power module installed in a 3U chassis

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图 7 水冷散热器的散热效果曲线(8 h)

Figure 7. Heat dissipation effect curve of new structure (8 h)

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图 8 不同输出电流下的8 h电流稳定度

Figure 8. The 8 h stability of the current under various output currents

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图 9 真实负载和螺线管负载500 A输出电流下电流纹波

Figure 9. Current ripple of 500 A output current under different load conditions

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