基于LLC諧振技術的高功率半導體激光器驅動電源研究
[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.
【學位授予單位】:華中科技大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TN248.4
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