电加工与模具
電加工與模具
전가공여모구
ELECTROMACHINING & MOULD
2015年
3期
40-42,46
,共4页
全桥逆变%斩波%FPGA%能量释放%软开关
全橋逆變%斬波%FPGA%能量釋放%軟開關
전교역변%참파%FPGA%능량석방%연개관
full-bridge inverter%chopper%FPGA%energy-release%soft-switch
针对现有电解电源稳定性不足及对工具、工件保护不够及时的问题，提出一种带特殊保护功能的脉冲电解电源的实现方法。为改善输出电流波形，提高加工质量，电源采用全桥逆变加斩波的拓扑结构。在传统的过压、过流保护的基础上，增加能量快速释放功能模块，实现快速短路保护，及时为残留在电感电容中的电能提供泄放通道，防止电源系统损坏和工具、工件损伤。在常规斩波方式的基础上，提出基于FPGA的斩波软开关功能，在一定程度上降低斩波IGBT的开关损耗，减小了温升，提高了稳定性。
針對現有電解電源穩定性不足及對工具、工件保護不夠及時的問題，提齣一種帶特殊保護功能的脈遲電解電源的實現方法。為改善輸齣電流波形，提高加工質量，電源採用全橋逆變加斬波的拓撲結構。在傳統的過壓、過流保護的基礎上，增加能量快速釋放功能模塊，實現快速短路保護，及時為殘留在電感電容中的電能提供洩放通道，防止電源繫統損壞和工具、工件損傷。在常規斬波方式的基礎上，提齣基于FPGA的斬波軟開關功能，在一定程度上降低斬波IGBT的開關損耗，減小瞭溫升，提高瞭穩定性。
침대현유전해전원은정성불족급대공구、공건보호불구급시적문제，제출일충대특수보호공능적맥충전해전원적실현방법。위개선수출전류파형，제고가공질량，전원채용전교역변가참파적탁복결구。재전통적과압、과류보호적기출상，증가능량쾌속석방공능모괴，실현쾌속단로보호，급시위잔류재전감전용중적전능제공설방통도，방지전원계통손배화공구、공건손상。재상규참파방식적기출상，제출기우FPGA적참파연개관공능，재일정정도상강저참파IGBT적개관손모，감소료온승，제고료은정성。
Aim at the problem of insufficient stability and no rapid protection for tools and workpiece in existing electrolytic power supply ,a specific protection functions is introduced. To improve current waveform and processing quality ,a topology including full-bridge inverter and chopper is employed on this power supply. Based on the traditional over current and over voltage protection ,the energy-release module is added to the power supply to provide a quick short-circuit protection system and a discharge channel for residual electric energy in inductor and capacitor timely ,in order to prevent voltage spike damage to the device ,and prevent large current damage to tools and workpiece. Based on routine chopper,soft-switch function module based on FPGA is proposed to reduce switch loss on chopping IGBT to decrease the temperature rise and improve the stability.
