新型节能电火花加工脉冲电源的脉冲发生器

循环叠加斩波式节能电火花加工脉冲电源的主要特点是不含有传统脉冲电源的限流电阻和多数节能脉冲电源使用的储能电感，采用功率开关管不完全导通的方法，通过对每只功率开关管的斩波电流进行循环叠加来产生电火花加工脉冲。对功率开关管进行循环叠加斩波控制时，根据各档延迟时间是最小延迟时间整数倍的特点。对脉冲发生器的逻辑进行巧妙的优化设计，可以大大节省PLD内部的资源。在该电源所选电路规格的情况下大约只占用了优化前常规方法所占资源的1／8，避免了硬件资源的浪费,降低了成本。

Pulse Generator of New Energy Saving EDM Pulsed Power Supply

The energy saving electrical discharge machining (EDM) pulsed power supply possesses the characters of non current-limiting resistors and non energy storage inductors. Many branches of the paralleling spike pulse currents chopped by power transistor are combined into the desired pulse current for EDM machining through cyclic superimposition. Based on the fact that all delay time among all drive signals of the power transistors are exact multiple of the minimal delay time, an ingenious optimum design is developed. By this method, the hardware resource of the programmable logic device (PLD) and the cost of the power supply are reduced dramatically.