半导体激光熔覆机驱动电源及能量控制研究

发布时间：2018-04-27 16:09

本文选题：半导体激光熔覆机 + 驱动电源　；参考：《长春工业大学》2015年硕士论文

【摘要】：在激光加工方面,以全固态激光器取代闪光灯泵浦固体激光已经是大势所趋。驱动电源作为半导体激光加工设备的核心部分,其性能好坏直接影响到整个激光装置的技术指标。本文以半导体激光熔覆机驱动电源为研究背景,设计了相关硬件电路和应用程序,并进行了仿真和实验验证。论文完成以下研究工作：第一,根据半导体激光熔覆机驱动电源的技术要求,对驱动电源进行了软硬件设计。在研究恒流源的稳流原理的基础上,对恒流源驱动电路和光功率采集电路硬件进行了设计。恒流源驱动电路采用串联反馈式恒流源驱动模式,并设计了驱动器的浪涌消除电路、过流过压检测电路,同时对相关软件进行了设计。第二,对半导体激光器温度控制单元硬件和软件进行设计。包括温度采样电路、恒温控制电路、热电制冷电路。采用数字PI算法完成半导体激光器温度闭环控制。第三,对激光熔覆机能量控制进行了研究。通过光功率采集,采用数字PI算法,完成了光功率的闭环调节。第四,对半导体激光熔覆机驱动电源的主回路进行了仿真和实验验证,同时对主回路瞬态、直流稳态和噪声进行了仿真分析。最后,对半导体激光器温控单元及光功率调节系统,进行了闭环仿真实验。通过以上仿真及实验测试结果,证明了文中设计的半导体激光熔覆机驱动电源的正确性。
[Abstract]:In laser processing, it is a general trend to replace flash-pumped solid-state laser with all-solid-state laser. As the core part of semiconductor laser processing equipment, the driving power supply has a direct impact on the technical specifications of the whole laser device. In this paper, based on the driving power supply of semiconductor laser cladding machine, the related hardware circuit and application program are designed and verified by simulation and experiment. The main works are as follows: first, according to the technical requirements of the driving power supply of semiconductor laser cladding machine, the hardware and software of the drive power supply are designed. On the basis of studying the steady current principle of constant current source, the hardware of driving circuit and optical power acquisition circuit of constant current source are designed. The constant current source drive circuit adopts the series feedback constant current source drive mode, and designs the surge elimination circuit of the driver, the overcurrent overvoltage detection circuit, and the related software design. Secondly, the hardware and software of the semiconductor laser temperature control unit are designed. Including temperature sampling circuit, constant temperature control circuit, thermoelectric refrigeration circuit. The temperature closed loop control of semiconductor laser is accomplished by using digital Pi algorithm. Thirdly, the control of laser cladding function is studied. Through optical power acquisition and digital Pi algorithm, the closed loop regulation of optical power is completed. Fourthly, the main circuit of the semiconductor laser cladding machine driving power supply is simulated and verified by experiments. The transient, DC steady state and noise of the main circuit are also simulated and analyzed. Finally, a closed loop simulation experiment is carried out on the temperature control unit and optical power regulation system of semiconductor laser. The simulation and experimental results show the correctness of the semiconductor laser cladding power supply designed in this paper.
【学位授予单位】：长春工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN248.4;TN86

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