电子束焊机电源控制系统的设计与实现

电子束焊机高压加速稳压电源输出电压的稳定是保证电子束焊接质量的前提条件,传统的高压加速稳压电源电路结构复杂、体积大.为此设计了一种电子束焊机高压加速稳压电源控制系统,主电路采用PWM buck-boost变换器结构,其较高的升压比降低了升压变压器的升压比,与传统的同类电源相比,体积更小,电路更为简单;分析了系统主电路特性和工作过程,建立了系统电路小信号模型,采用了滞后-超前校正补偿的控制方式.结果表明,系统具有响应速度快、可靠性和控制精度高、抗干扰能力强等特点.

Design and implementation of a power control system for electron beam welder

Stability of output voltage of high-voltage accelerating stabilized power supply for electron beam welder(EBW) is a prerequisite to ensure the electron beam welding quality.The common power supplies have the disadvantages of circuit complexity and bulkiness.A novel control system of high-voltage accelerating stabilized power supply for EBW was designed.Its main circuit is based on pulse-width modulation(PWM) buck-boost converter topology.Compared with common EBW power supplies,this new power supply requires a much lower voltage grade transformer because of the converter’s effect for rising voltage,so its volume is smaller and the circuit is simpler.The system main circuit characteristics and its working process were analyzed.The system circuit’s small-signal mathematical model was created,and lag-lead correction compensation control was employed in the system to achieve static and dynamic performance requirements.The results displayed that this unit had the characteristics of fast response,high reliability,high control precision and anti-interference capability.