焊接电源中谐波和电磁干扰的分析.pdf

第39卷第12期 雹珲拽 V01．39 No．12 2009年12月 Electric Machine Dec．2009 Welding 焊接电源中谐波和电磁干扰的分析 张小平1。曹太强2 (1．攀枝花学院电气信息工程学院，四川攀枝花617000；2．四川玻璃股份有限公司，四 川自贡643000) 摘要：为了分析焊接电源电能质量，通过对高频大功率整流和逆变开关电源理论的分析可知，焊接电源 的谐波和电磁干扰是影响焊接电能质量的主要污染源。同时通过实验可知，在开关电源中除了有谐波的 传导干扰外，还存在电磁的辐射干扰，因此，在焊接电源中必须要对谐波进行抑制和电磁干扰进行处理。 关键词：谐波；焊接开关电源；电磁干扰 中图分类号：TG434．1，TN03文献标识码：A ontheharmonicsandEMIof for source Study switchingpowersupplyweldingpower ZHANG 1，CAO Xiao-pinTai-qian92 ofInformationandElectric 61 (1．School Engineering，PanzhihuaUniversity，Panzhihua Glass CO．，LTD．，Zigong643000，China) 棚嘲Ia吐：Inorderto theelectric of thetheoreticalon study energyquality tIIe switchingpowersupply，through analysis higlI rectificationandthereverse switch concludethatthe hwitch isthemain frequencylarge—power supplytheory，we welding supply of souH．e the thesametime．weobtainharmonic ofthe polluting affectingpowerenergyquality．At high componentsweldingswitching arethe reasons tothe testshowsthatthethewaveof fieldand time fieldofEMI supply major leadingsystempolluted．The frequency was of tested，whichshowstheEM!stillexistsbesidestheconductioninterferenceofharmonicinthe weldingswitchingpowersupply wemustrestrictharmoniesandEMi． highpowerswitchingpowersup