【作者】 王敏；

【导师】 马新敏；

【作者基本信息】 华中科技大学 ， 物理电子学， 2004， 硕士

【摘要】 本文主要内容是关于大功率半导体泵浦固体激光器电源中软开关技术的研究。目前,随着激光产业的发展,大功率半导体泵浦固体激光器在工业加工中的应用也愈来愈广泛,故其驱动电源的发展也显得更加迫切。通常大功率半导体泵浦固体激光器的驱动电源由两部分组成:前级电路和后级电路。本文主要围绕着激光电源的前级电路ZVS PWM DC/DC移相全桥电路的主电路拓扑以及工作过程、控制电路的实现方法、后级电路的设计、电路和系统的计算机仿真以及实验进行了论述。其中前级电路的分析为本文的重点。文中首先介绍了传统的ZVS PWM DC/DC移相全桥电路的工作原理,指出了传统电路的缺陷,从而引出本文的重点——一种新型ZVS PWM DC/DC移相全桥变换器。文中详细地分析了主电路的工作过程,解释了零电压开通和关断的实现机理和条件,理论证明了该拓扑图具有小的占空比丢失以及滞后桥臂易开通等优点。同时,文中还阐述了激光电源后级电路的设计思想以及工作原理。文中有大量的仿真分析,该仿真都是使用MATLAB软件中的Sinmulink工作平台,所有的器件都是根据实际元件参数而给定的,仿真结果与工作情况比较接近。在理论分析和仿真分析的基础上,本文介绍了大功率半导体泵浦固体激光器电源的设计思路,以及参数的选择,并指出了在设计控制电路以及制作电源中需要注意的一些问题,最后给出了实验结果。更多还原

【Abstract】 The main content of this thesis is about the study on Phase-Shift-PWM high frequency converter and soft-Switch technology for laser power supply. With the developing of laser industry, the Diode Pumped Solid State Laser (DPSSL) is more important. So the power supply for DPSSL is paid attention to by many researcher.Generally, the power supply is composed by pre-circuit and post-circuit. The thesis is centering around the main circuit topology of the pre-circuit, the control circuit, the design of post-circuit, simulation and experiment. And the pre-circuit principle is more important in this paper.The thesis describes the traditional circuit topology of Phase-Shift-PWM converter, and argues the shortcoming of the traditional circuit firstly. And then, the new basic circuit topology of Phase-Shift-PWM converter for laser power supply is detailed. The working procedure of the main circuit is analyzed, the realization of Zero Voltage Switch (ZVS) is proposed. The difference between the new topology and the traditional topology is illustrated. And the design principle of post-circuit is discussed in the thesis.There is a lot of simulation in the thesis, and the simulation is achieved in the software of MATLAB. To get the true simulation results close to the real working condition, all the components are formed using real component parameters.In the base of theoretical and simulation analysis, the thesis introduces the design procedures of laser power supply for DPSSL. The design and selection of parameters are discussed. Some special problems that happened during the course of the power supply design are pointed out, too. In the end of the thesis, the experiment results of laser power supply are given.更多还原