电加工与模具
電加工與模具
전가공여모구
ELECTROMACHINING & MOULD
2014年
z1期
29-32
,共4页
脉冲电源%PIC单片机%触摸屏%压频%过流保护
脈遲電源%PIC單片機%觸摸屏%壓頻%過流保護
맥충전원%PIC단편궤%촉모병%압빈%과류보호
pulse power supply%PIC MCU%touchscreen%voltage to frequency%overcurrent protection
针对正在进行研制的专用电火花线切割加工机床,自主研制了一种高频脉冲电源。利用SG3525作半桥专用脉冲发生器,16位高性能单片机控制脉冲的频率和占空比,实现了输出脉冲的频率、电压和占空比连续可调。使用IGBT专用驱动后,当加工出现短路时能立即对驱动信号进行软关断,防止IGBT因过流而损坏,极大地提高了脉冲电源在短路发生时的可靠性。用压频芯片对间隙电压进行V/F转换,提高了间隙电压检测的精度和速度,实现了加工间隙电压检测的智能控制。设计了基于触摸屏控制的人机交互界面,将脉冲电源的控制与运动平台的控制有机地统一起来,操作更方便。
針對正在進行研製的專用電火花線切割加工機床,自主研製瞭一種高頻脈遲電源。利用SG3525作半橋專用脈遲髮生器,16位高性能單片機控製脈遲的頻率和佔空比,實現瞭輸齣脈遲的頻率、電壓和佔空比連續可調。使用IGBT專用驅動後,噹加工齣現短路時能立即對驅動信號進行軟關斷,防止IGBT因過流而損壞,極大地提高瞭脈遲電源在短路髮生時的可靠性。用壓頻芯片對間隙電壓進行V/F轉換,提高瞭間隙電壓檢測的精度和速度,實現瞭加工間隙電壓檢測的智能控製。設計瞭基于觸摸屏控製的人機交互界麵,將脈遲電源的控製與運動平檯的控製有機地統一起來,操作更方便。
침대정재진행연제적전용전화화선절할가공궤상,자주연제료일충고빈맥충전원。이용SG3525작반교전용맥충발생기,16위고성능단편궤공제맥충적빈솔화점공비,실현료수출맥충적빈솔、전압화점공비련속가조。사용IGBT전용구동후,당가공출현단로시능립즉대구동신호진행연관단,방지IGBT인과류이손배,겁대지제고료맥충전원재단로발생시적가고성。용압빈심편대간극전압진행V/F전환,제고료간극전압검측적정도화속도,실현료가공간극전압검측적지능공제。설계료기우촉모병공제적인궤교호계면,장맥충전원적공제여운동평태적공제유궤지통일기래,조작경방편。
For developing dedicated WEDM machine ,a high-frequency pulse power supply is developed independently. SG3525 for exclusive used as the half-bridge pulse generator ,16-bit high-performance microcontroller controlling pulse frequency and duty cycle ,the output pulse frequency , voltage and duty cycle are continuously adjustable. Using IGBT exclusive driver ,while a short circuit occured,the drive signal soft is immediately turn off,so that IGBT is avoided to damage due to over-current,which improves greatly the reliability of pulse power. V/F converter improve the detection accuracy and speed of the gap voltage ,and it realizes also intelligent control of the machining gap voltage detector. The interactive interface based on touchscreen control is designed. The control pulse power and motion control platform for organic unity ,the operation is more convenient.