高效电压调节型电火花脉冲电源的设计

Design of voltage-adjusting and high-effective EDM pulse generator

在对传统脉冲电源和现有节能脉冲电源的工作原理、控制策略进行分析的基础上,针对传统脉冲电源存在电能利用率低的弊端,提出一种高效电压调节型火花放电脉冲电源。这种电源的电路具有自适应调节输出电压和等电流脉宽的特性,利用电路的拓扑结构进一步优化控制策略,演算电路的动态分析模型,同时对电路的各个主要器件进行设计和计算,给出实际电流电压波形以及自适应调压波形。结果表明:所设计的电源可实现空载电压、脉冲宽度、脉间宽度大范围独立可调,彻底取消耗能严重的限流电阻;电路具有较高的调压精度和较好的加工工艺效果。

On the basis of analysis of the principle and control strategy for conditional and saved-energy pulse generators, a high-effective pulse generator with voltage-adjusting was presented in order to improve electric energy efficiency of conditional pulse generator. The output voltage can automatically be adjusted and the self-adapting current of equal pulse width can be produced in this pulse generator. The control strategy was optimized by new circuit topological structure and dynamic model of the circuit was given. Main technical parameters of the circuit were designed to fulfill faster response rate of output voltage. The true current and voltage-adjusting waveforms were presented. The results show that the large-scale unattached adjustments to no-load voltage, pulse width and intercostals width can be completed. Current-restricting-resistor is completely canceled in this circuit. The circuit has high voltage-adjusting precision and good machining effect.