| 全桥LLC串联谐振X光机高压直流电源 |
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| 引用本文： | 唐治德,张正茂,杨红,杨冰,舒志强.全桥LLC串联谐振X光机高压直流电源[J].重庆大学学报(自然科学版),2012,35(3):85-91. |
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| 作者姓名： | 唐治德 张正茂 杨红 杨冰 舒志强 |
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| 作者单位： | 重庆大学 输配电装备及系统安全与新技术国家重点实验室,重庆 400044;重庆大学 输配电装备及系统安全与新技术国家重点实验室,重庆 400044;重庆大学 输配电装备及系统安全与新技术国家重点实验室,重庆 400044;重庆大学 输配电装备及系统安全与新技术国家重点实验室,重庆 400044;南京杰雄医疗装备有限公司,南京 210012 |
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| 基金项目： | 国家自然科学基金资助项目(50877082);重庆大学输配电装备及系统安全与新技术国家重点实验室资助项目(2007DA10512709303) |
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| 摘 要： | 针对X光机电源的全桥移相拓扑结构存在占空比丢失问题,提出一种全桥LLC串联谐振变换器与单相双向对称倍压整流电路相结合的高频高压X光机电源。在主电路中,采用全桥LLC串联谐振、高压变压器、单相双向对称倍压整流电路;从理论上分析了零电压软开关工作条件,建立主电路基波等效(fundamental harmonic approximation,FHA)模型,并对主电路的参数进行设计。仿真结果表明：输出电压可以在40～120 kV内连续可调,不存在占空比丢失;输出电压上升时间短、纹波小。证明了所提出拓扑的正确性和可靠性。
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| 关 键 词： | LLC串联谐振 零电压开关 倍压整流器 X光机电源 高压直流电源 |
Full bridge LLC series resonant converter for X-Ray high voltage DC power supply |
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| TANG Zhi de,ZHANG Zheng mao,YANG Hong,YANG Bing and SHU Zhi qiang.Full bridge LLC series resonant converter for X-Ray high voltage DC power supply[J].Journal of Chongqing University(Natural Science Edition),2012,35(3):85-91. |
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| Authors: | TANG Zhi de ZHANG Zheng mao YANG Hong YANG Bing and SHU Zhi qiang |
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| Institution: | State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University, Chongqing 400044, P.R.China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University, Chongqing 400044, P.R.China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University, Chongqing 400044, P.R.China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University, Chongqing 400044, P.R.China;Nanjing Jasons Medical Systems Ltd., Nanjing 210012, P.R.China |
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| Abstract: | To prevent the duty cycle loss of full-bridge converter controlled by the phase-shifting method, a high frequency high voltage X-ray power supply is proposed. It combines full bridge LLC(FB-LLC) series resonant converter with bipolar single-phase symmetrical voltage multiplier. FB-LLC series resonant, high voltage transformer and bipolar single-phase symmetrical voltage multiplier are used in the main circuit. The LLC series resonant circuit and working conditions of soft switch are analyzed. The fundamental harmonic approximation model is established. The parameters of the main circuit are designed. The simulation results show that the output voltage adjusted continuously within 40~120 kV and without duty cycle loss. The X-ray power supply is proposed to achieve a quick rise and low ripple of output voltage. According to the simulation results, the proposed topology is correct and reliable. |
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| Keywords: | LLC series resonant zero voltage switching voltage multiplier X-ray power supply HVDC |
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