Huazhong University of Science and Technology Wuhan 430074, P.R.China Jan, 2012
独创性声明
本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研 究成果。尽我所知，除文中已经标明引用的内容外，本论文不包含任何其他个人或集 体已经发表或撰写过的研究成果。对本文的研究做出贡献的个人和集体，均已在文中 以明确方式标明。本人完全意识到，本声明的法律结果由本人承担。
Research on push-pull forward capacitor charging power supply
Candidate： Xuanang Zhang Major： Power Electronics and Electric Drive Supervisor：Eng.Heqing Zhong
II
华 中 科 技 大 学 硕 士 学 位 论 文
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摘
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要 ................................................................................................................. I
ABSTRACT .......................................................................................................II 1 绪论 1.1 课题提出的背景........................................................................................(1) 1.2 几种高压电容器充电电源的拓扑 ...........................................................(2) 1.3 推挽正激高频高压充电电源特点 ...........................................................(4) 1.4 硬开关的缺点以及软开关技术 ...............................................................(5) 1.5 本文研究的内容........................................................................................(6) 2 推挽正激充电电路的工作模式分析 2.1 有环流模态的工作原理 ...........................................................................(7) 2.2 无环流情况下的工作原理 ..................................................................... (11) 2.3 输入峰值电流、充电电流和环流计算 ................................................(14) 2.4 仿真分析..................................................................................................(19) 2.5 本章小结..................................................................................................(24) 3 1KW 28V/ 15KV 充电电源的设计与实现 3.1 1KW 28V/ 15KV 充电电源主要性能指标 ..........................................(25) 3.2 主电路结构和参数设计 ........................................................................(25) 3.3 控制电路的设计.....................................................................................(30) 3.4 驱动电路的设计............................................................ 3.5 电压检测保护电路的设计 .....................................................................(33) 3.6 本章小结..................................................................................................(34) 4 高频变压器设计 4.1.1 高频高压变压器的等效电路 ..............................................................(36)
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分 类 号 学校代码 10487
学号 密级
M200971070
硕士学位论文
推挽正激电容器充电电源的研究
学位申请人： 张轩昂 学科专业： 指导教师： 答辩日期： 电力电子与电力传动 钟和清 工程师
2012 年 1 月
A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Engineering
关键词：推挽正激 环流 电容器充电 高频高压变压器
I
华 中 科 技 大 学 硕 士 学 位 论 文 Abstract
The pulse power technology application scope are more and more wide, it has extended from the initial research and the military field to the medical, industry, education, civil, and other fields. It is a very dynamic emerging disciplines. Capacitor is the most common primary energy storage device used in the pulse power system. Developing high-performance high voltage capacitor is very important. High frequency converter capacitor power supply has many advantages, such as, high output voltage accuracy and stability , easy to control the output voltage , and little impact to the capacitance, available to extend the service life of the capacitor. It is the development direction of the high voltage capacitor charging power supply. Nowadays commonly used high frequency converter charging power supply , such as series resonant charging power supply ,has many power devices, and it’s structure is complex . That is not suitable for the topology of the high voltage capacitor charging power supply with low power and low input voltage. This paper puts forward a simple and reliable high voltage capacitor charging power supply based on the push-pull forward topology , which is suitable for low voltage high current input occasions, like airborne high voltage capacitor charging power supply. This paper first analyzes the push-pull forward charging electric circuit in depth, and analyzes the operation of all circuit modes with or without the circulation. The simulation results show the validity of the theoretical analysis. Combining with the formula and simulation analysis, the paper analyzes the influence that the ground-clamp capacitance and inductance size, the frequency, the transformer and the charging voltage caused to the the input current, charging electric current and the pulse of the ground-clamp capacitance. Then the author designs the circuit structure and selects the main parameters, and emphatically analyzes the high frequency high voltage transformer design. The author also designs the control circuit, including the sampling, protection and drivers circuit . In the end , the author designs and develops a prototype of 1 kW 28 V / 15kV the push-pull forward charging power supply , and the experimental results proved the circuit analysis and simulation that put out in the front of the paper. Keywords: push-pull forward voltage transformer circulation capacitor charging high frequency high