【摘要】 设计了一种新型PWM-BUCK电子束焊机高压加速稳压源电路系统,系统内设精密开关限流电路,能有效防止浪涌电流和过流的产生,提高了系统工作的可靠性和稳定性.通过SABER仿真,全面分析了系统的开、闭环特性,结合系统特点提出了一个含电源前馈补偿的PID控制器,同时论述了控制器的参数设计原理和步骤.结果表明,系统具有稳压精度高、动态特性好、换能效率高、工作条件要求低、整机系统可靠性高等优点.更多还原

【Abstract】 A novel PWM-BUCK type of high-voltage accelerating stabilized power source system for electron beam welder is introduced,and the switch current-limiting circuit is built to prevent surge current and over-current,which increase the system reliability and stability.By means of SABER simulation,the open and closed loop characteristics of the system are analyzed in detail.A PID controller with power supply feed-forward compensation for the voltage control is proposed,and the setting principle and procedure of parameters for the controller are discussed.The simulation and application results show that this system has high control precision,good dynamic behavior,high energy conversion efficiency,low working condition requirements and high working reliability.更多还原