Analysis And Design Of High-power Semiconductor Laser Power Supply Monomer

The high-power semiconductor laser driving power supply is the core component of high-power laser system,and its performance directly affects the output laser quality and the service life of the semiconductor laser.With the rapid increase of the laser system's power,the volume and weight of the semiconductor laser power supply has also risen sharply,which is difficult to meet the miniaturization requirements of the vehicle-mounted mobile occasion,and the semiconductor laser power supply also faces many other performance challenges.Firstly,comprehensively comparing the advantages and disadvantages of various DC power supply schemes,the main circuit topology of the semiconductor laser power supply studied in this paper is AC/DC uncontrolled rectifier,DC/AC high frequency inverter,AC/DC uncontrolled rectifier three-level transformation scheme.The DC/AC high frequency inverter uses a phase shift full bridge.Secondly,the open-loop performance of the semiconductor laser power supply system is simulated to verify the feasibility of the main circuit topology.In order to solve the problem of large volume and weight of semiconductor laser power supply filter,this project optimizes the filter to make the filter's weight minimum under the premise of meeting the requirement of output current ripple.Finally,LCLC filter circuit is selected.Based on the optimal design filter,the open-loop mathematical model of the semiconductor laser power supply system is established,and an active damping method based on state variable feedback is proposed to reduce the resonance peak of the system at the resonant frequency.Therefore,the semiconductor laser power supply system adopts the current double-closed-loop control strategy based on capacitace's current feedback.The outer loop is used to stabilize the output current,and the inner loop is used to realize active damping.Finally,the closed-loop performance of the semiconductor laser power supply system is simulated and analyzed,and the anti-interference ability of the system is improved when the power supply voltage or output load is abrupt.Then,through the theoretical calculation and the actual engineering requirements,the main circuit components' parameters of the semiconductor laser power supply are designed,the appropriate components are selected and the main circuit experimental platform is built.Then,the semiconductor laser power supply control system is analyzed and designed,the control system scheme is given and the control circuit is designed.The control system adopts PID feedback control technology,and the program design of the control system is given,including the basic program and PID feedback program,focusing on the C language implementation of the PID program.Finally,a 10 kW power supply experimental platform is built.Open-loop and closedloop experiments are carried out under low voltage,laying the foundation for subsequent research.