电容充放电脉冲数字控制型电火花沉积电源

Digital control of capacitance charge-discharge pulse in electro-spark deposition power supply

传统的电火花沉积电源由于放电电压不能连续调整,导致电火花沉积应用范围受限、效率较低.针对这点不足,研制了一台电容充放电脉冲数字控制型电火花沉积电源.该电源包括微处理器、整流滤波电路、充电及其驱动电路、充电电压比较电路、放电及其驱动电路、运动电极等.电源充电过程和放电过程交替进行,可以对放电电压进行无级调整,实现放电能量的无级调整,放电频率也可无级调整.结果表明,电源在电极与工件短路时,可控硅仍能可靠关断,放电参数调整方便,适应各种工艺条件的要求.

The discharge voltage of traditional depositing power supply cannot be continuously adjusted,which limits the application range of electro-spark deposition and the efficiency of electro-spark deposition. In order to overcome this shortage,a digital control of capacitance charge-discharge pulse in electrospark deposition power supply was developed. This power supply consists of CPU,rectifier and filter circuit,charge and its drive circuit,charge voltage comparison circuit,discharge and its drive circuit,motorial electrode,etc. With alternate charge and discharge process of this power supply,discharge voltage and discharge energy as well as discharge frequency can be adjusted steplessly. Experimental results show that the SCR of this power supply can be shut off safely when a short circuit occurs between the electrode and the workpiece,which greatly improves the efficiency of pulse output. The adjustment of discharge parameters is convenient,thus the power supply meets the requirements of various process condition.