大功率移相全桥软开关电源的研究与设计

发布时间：2018-04-13 10:28

本文选题：移相控制 + 脉宽调制技术　；参考：《电子科技大学》2017年硕士论文

【摘要】：回旋器件是一种新型毫米波器件,具有高功率、宽频带等特点,它在毫米波雷达、通信及电子对抗、受控核聚变、微波能武器等方面有着十分广泛的应用前景。随着开关电源的拓扑结构、软开关技术、自动控制等理论与技术的不断进步,以及固态大功率开关器件、磁性材料、控制技术等的不断发展,大功率开关电源得以实现并被广泛运用。在大功率高压电源的研制中,开关电源技术和软开关技术的引入使得大功率高压电源的体积、重量不断减小、功率密度不断提高、数字化程度也越来越高。本文介绍了移相全桥PWM ZVS逆变技术在大功率回旋器件工作中的应用背景,设计并实现了基于移相控制软开关的大功率高压开关电源。本文首先讲述了开关电源及相关技术的发展历程和趋势,以及软开关技术和移相控制方式的相关理论。在分析了基本原理和比较了其优缺点之后,阐明了移相全桥PWM ZVS逆变器在大功率移相全桥软开关电源设计中的意义,并介绍了该电源系统在大功率回旋器件工作中的应用。其次介绍了基于辅助网络的PWM ZVS逆变器的工作原理,全面分析了移相全桥PWM ZVS逆变器一个开关周期内各个工作模态下的工作原理和等效电路结构以及相应的电路方程;通过对谐振回路各器件参数的分析计算,得出了两个不同桥臂上开关管死区时间的选取和实现零电压开关的条件。最后基于对移相全桥PWM ZVS逆变器的理论分析,确定了一种大功率移相全桥软开关电源的设计方案。并介绍了具体的设计步骤,通过增加辅助网络帮助超前桥臂开关管和滞后桥臂开关管在实现了全范围的ZVS。通过对移相控制芯片外围电路和相应PID闭环控制回路的设计实现电压输出的稳定性,通过增加相应的保护电路,使得逆变电路的可靠性得以提高。给出了主电路各元器件型号及参数选取的依据,并依次进行仿真。最终给出了电源实验平台的测试波形,验证了方案设计的可行性和参数选取的准确性。
[Abstract]:Gyrotron is a new type of millimeter wave device with high power, broadband characteristics in millimeter wave radar, communication and electronic warfare, controlled nuclear fusion, microwave energy has a very broad application prospects of weapons etc. with the switching power supply topology, soft switching technology, progress of the theory and technology of automatic control, magnetic materials and solid-state high power switching devices, the continuous development of control technology, high power switching power supply can be realized and widely used. In the development of large power and high voltage power supply, the switching power supply technology and soft switching technology makes the high voltage power supply volume, weight decreases, power density continuously improve the level of digital is more and more high. This paper introduces the application background of PWM phase shifted full bridge ZVS inverter technology in high power gyrotron devices, designed and implemented based on phase shift control High power high voltage soft switching power supply. This paper describes the development history and development trend of switching power supply and related technology, and the related theory of soft switching and phase shift control. After analyzing the basic principle and compare their advantages and disadvantages, expounds the significance of phase shifted full bridge PWM inverter in ZVS soft switching power supply design the power phase shifted full bridge, and introduces the application of the power supply system in high power gyrotron. The second introduces the working principle of ZVS inverter PWM auxiliary network based on a comprehensive analysis of the PWM phase shifted full bridge ZVS inverter in a switching cycle of each mode of the working principle and the equivalent circuit structure and circuit the corresponding equations; through the analysis of the parameters of resonant circuit of each device is calculated, the selection of dead time and zero voltage switch two different bridge arm. Conditions. Finally based on the analysis of phase shifted full bridge PWM inverter ZVS theory, determine the design scheme of a high power phase shifted full bridge soft switching power supply. And introduces the specific design steps, through the auxiliary network to help the leading leg switches and ZCS for the lagging arm in the realization of the full range of ZVS. by design of phase shift control chip peripheral circuits and the corresponding PID closed-loop control circuit to achieve stability by increasing the output voltage, corresponding protection circuit, the inverter circuit reliability can be improved. Given the selection of the main circuit of each component type and parameters, and makes simulation. Finally the test waveform power experimental platform are verified the accuracy and feasibility of the parameter selection scheme.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN86

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