新型电子灭弧技术在机械开关中的应用

Applications of new electronic arc extinguishing technologies in mechanical switches

本文分析了传统灭弧技术实用上的不足,介绍了AST、ASD和AAE这3种新的电子灭弧技术及其实用效果。AST和ASD技术采用电子开关并联在机械开关两端与机械开关构成复合开关,并联的电子开关能够侦测机械开关的分断,并在机械开关分断的过程中持续导通而达到对机械开关灭弧的效果,AST技术应用在交流灭弧,ASD技术应用在直流灭弧。AAE技术应用在直流灭弧,它采用储能元件并联在负载两端,在侦测到机械开关分断后,在适当的时机释放储能元件上的能量来降低机械开关两端的电场强度而对机械开关灭弧。利用3种灭弧技术制作的灭弧器件独立于机械开关,通过测试验证了3种器件在各自领域都具有良好的灭弧效果。

On the basis of analyzing the shortcomings of traditional arc extinguishing technology in practical application,three new electronic arc extinguishing technologies,AST,ASD and AAE,and their practical effects are introduced.The AST and ASD technologies use electronic switches connected in parallel at both ends of the mechanical switch to form a hybrid switch with the mechanical switch.The parallel electronic switch detects the breaking of the mechanical switch and achieves the effect of extinguishing the arc of the mechanical switch in an extreme short conduction time immediately after the mechanical switch is broken.The AST technology is applied to AC arc extinguishing and the ASD is applied to DC arc extinguishing.The AAE technology is applied to DC arc extinguishing,it uses the energy storage elements connected in parallel at both ends of the load.When detecting the breaking of the mechanical switch,the energy on the energy storage elements is released at an appropriate time to reduce the electric field strength at both ends of the mechanical switch so as to extinguish the arc of the mechanical switch.The arc-extinguishing devices made by using these three arc-extinguishing technologies are independent of mechanical switches,and have been tested and verified that the three devices have good arc-extinguishing effects in their respective fields.