电火花加工用的脉冲电源亦即脉冲发生器,它的作用是把普通220V或380V50赫的交流电转换成频率较高的脉冲电流,以使电极间隙产生火花放电来蚀除金属。脉冲电源对电火花加工的生产率、光洁度、稳定性和工具电极的损耗比等技术经济指标有极大的影响,所以人们对于脉冲电源的型式及元件参数选择的研究极为注意。近年来由于型腔模加工愈来愈多,对脉冲电源也就提出了更高的要求。主要的有:①要求工具电极的损耗要低,不仅粗规准时要低,而且中规准加工((?)4-(?)5)时也要低 Pulse electric discharge machining pulse generator, which is the role of the ordinary 220V or 380V50 Hz alternating current into a higher frequency of the pulse current, so that the electrode gap to spark discharge to erase the metal. The pulse power has a great influence on the technical and economic indexes such as the productivity, finish, stability and tool electrode loss ratio of EDM. Therefore, people pay more attention to the research of pulse power type and component parameter selection. In recent years, more and more due to cavity mold processing, the pulse power also put forward higher requirements. The main ones are as follows: ①It is required that the loss of the electrode of the tool should be low, not only the punctuality should be low on time, but also the standard processing ((?) 4 - (?) 5)