基于LLC谐振技术的高功率半导体激光器驱动电源研究

发布时间：2018-10-23 18:40

【摘要】：半导体激光器是由激光二极管(LD)串联成阵列构成,具有电-光转换效率高、体积小、重量轻等诸多优点。在激光加工领域,或直接对材料进行加工,或作为泵浦源构成光纤、碟片等固体激光器后再做加工使用。LD模块驱动电源是半导体激光器的重要组成部分,所以对其研究有重要意义。本论文的主要内容是针对特定的LD模块,研发一台具有高功率、高效率、高功率因数的驱动电源。⑴分析了目前市场上LD模块驱动电源性能的优劣,由此提出一种基于LLC谐振技术的高功率LD模块驱动电源。电源采用两级串联结构,其中前级为交错并联升压型功率因数校正电路(Boost PFC),后级为基于LLC谐振技术的直流/直流(DC/DC)变换电流源电路。通过在电源系统中运用有源功率因数校正技术,来提高电源输入端的功率因数;通过运用交错并联技术和LLC谐振软开关技术,来提升整个电源系统的功率密度和电能转换效率。⑵针对电源结构,分析了电路各个模态的工作原理,通过对电源电路的理论分析,阐述了该电源系统的优势,即可兼顾高的电能转换效率和高的输入端功率因数。其后对其建立了功率传递的数学模型以及环路的小信号模型,并采用仿真软件saber对后级LLC谐振变换电流源主电路进行了仿真,同时分析了电源系统控制电路的环路特性以及整个电源系统的稳定性。⑶结合理论分析和仿真,针对德国DILAS公司E15.4Y-940.3-960C-VH8.1型LD模块,完成整个电源系统的硬件电路设计及参数设计,设计出一款性能样机。其满载输出特性:17V/60A(1KW)。⑷最后通过实验证明了所设计的LD模块驱动电源工作性能良好,以与LD伏安特性相似的硅链为负载时,电源输入端功率因数(PF)大于0.97,整个电源系统满载电能转换效率高达85%,具备高效率和高功率因数的特点,实验结果达到了预期。
[Abstract]:Semiconductor laser is composed of laser diode (LD) series array, which has many advantages, such as high efficiency of electro-optic conversion, small volume, light weight and so on. In the field of laser processing, the material is processed directly, or the solid state laser, such as optical fiber, disk and so on, is formed as pump source. The driving power supply of LD module is an important part of semiconductor laser. So it is of great significance to study it. The main content of this paper is to develop a power supply with high power, high efficiency and high power factor for specific LD modules. A high power LD module driver based on LLC resonance technology is proposed. The power supply adopts a two-stage series structure in which the front stage is a staggered parallel boost power factor correction circuit (Boost PFC),) and the rear stage is a DC / DC (DC/DC) conversion current source circuit based on LLC resonance technology. By using active power factor correction technology in power supply system, the power factor of power input can be improved, and by using staggered parallel technology and LLC resonant soft switch technology, To improve the power density and power conversion efficiency of the whole power supply system. 2 in view of the power supply structure, the working principle of each mode of the circuit is analyzed, and the advantages of the power supply system are expounded through the theoretical analysis of the power supply circuit. Can take into account the high power conversion efficiency and high input power factor. Then the mathematical model of power transfer and the small signal model of loop are established, and the simulation software saber is used to simulate the main circuit of LLC resonant converter current source. At the same time, the loop characteristics of the power system control circuit and the stability of the whole power supply system are analyzed. 3 based on the theoretical analysis and simulation, the hardware circuit design and parameter design of the whole power supply system are completed for the E15.4Y-940.3-960C-VH8.1 LD module of Germany DILAS Company. A performance prototype is designed. The full load output characteristics: 17V/60A (1KW). 4 finally, the experimental results show that the designed LD module driver has good performance, when the silicon chain which is similar to the LD volt-ampere characteristic is used as the load. The power factor (PF) of the power input is greater than 0.97, and the full load power conversion efficiency of the whole power supply system is as high as 850.It has the characteristics of high efficiency and high power factor. The experimental results reach the expectation.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN248.4

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