【作者】 王志强；

【导师】 马新敏；

【作者基本信息】 华中科技大学 ， 物理电子学， 2015， 硕士

【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。更多还原

【Abstract】 The semiconductor laser is constituted by laser diode arrays in series, which has advantages of small size, light weight and high electro-optical conversion efficiency. In the field of laser processing, or material processed directly, or as the pump source constitute optical fiber, discs and other solid-state lasers use before making process. LD driver is an important part of laser, so the research is meaningful. The purpose of the paper is the development of a high power supply for LD modules of high efficiency and high power factor.⑴The performance of the merits of LD driver in present market is analyzed. Ultimately proposes a high power supply for LD based on LLC resonant converter. It has two series stages, first stage is interleaved Boost PFC power factor correction circuit, and the second stage is a DC/DC converter current source circuit based on LLC resonant converter. Through the technology of active power factor correction in the system, to improve the power supply input power factor; by using interleaved technology and LLC resonant soft-switching technology, to improve the power density and energy conversion efficiency of the entire power system.⑵Against the power structure, various work modes of the circuit is analyzed. Through the theory analysis of power supply circuit, the advantages of the power system is described, I.e. both high energy conversion efficiency and high input power factor. Its mathematical model of power transfer and small-signal model are built. Furthermore, its main circuit is simulated by saber. The stability of the control loop and the entire power system is analyzed.⑶Combine theoretical analysis and simulation, for Germany DILAS Company E15.4Y-940.3-960C-VH8.1 type LD modules, the circuit design and parameters design of the entire power system is completed, a full load output: 17V/60A(1KW) of power supply is designed.⑷Experiments proved that the performance of the LD driver is good. While using the silicon chain which V-I characteristic is similar to LD as load, its input power factor is higher than 0.97, full load efficiency is up to 85%, which has the characteristic of high efficiency and high power factor. So the expected design goals is achieved.更多还原