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按一下以編輯母片標題樣式,按一下以編輯母片,第二層,第三層,第四層,第五層,*,IEC 61000-4-11,Voltage Dips, Short interruptions and voltage variations immunity tests,電壓瞬時跌落,短時中斷和電壓漸變的抗擾性試驗,Prepared by,RICHTEC,1,測試目的及應用場合,與低電壓電網連接之電氣電子設備會受到電網中,電壓瞬時跌落,短時中斷,和,電壓漸變,之影響,他們是由於供電電網,變電設備發生故障或負荷突然發生大的變動或是負荷連續變化所影起的,此IEC61000-4-11標準規定了電氣電子設備對此三種電網電壓變化的抗干擾試驗方法提供可供選擇之試驗等級,2,應用場合,該標準適用於,額定輸入電流每相不超過 16A 之電氣電子設備,-不,適用:,由直流及400Hz 網絡供電之設備,3,術語,電壓瞬時跌落(Voltage Dips):,電氣系統某一點的電壓突然下降,經過半個週期到幾秒鐘之短暫持續期後又恢復正常,短時中斷(Interruption):,供電電壓消失一段時間,一般不超過1分鐘,短時中斷可以認為是100%幅值電壓瞬時跌落,電壓漸變 (Voltage variation):,供電電壓逐漸變高或低於額定電壓,變化之持續時間相對於周期來說,可長可短,4,試驗等級,5,電壓瞬時跌落(Voltage Dip),230Vac,161Vac,代表電壓瞬時跌落 30%持續10個週期,代表再過0處跌變,6,電壓漸變 (Voltage Variation),短期供電電壓漸變之時間設定,7,電壓漸變 Voltage Variations,2s,電壓縮小所需要之時間,1s,電壓縮小持續時間,2s,電壓增加所需要之時間,8,PQT,電源品質測試,Voltage Variations,電壓漸變,IEC 61000-4-11,9,What is voltage variation?,什麼是電壓變動,Gradual up- or down-change of supply voltage,供電電壓逐漸 上昇或是滑落,(,比原供電電壓高或低,),Duration can be long or short with regard to the period,電壓逐漸變動持續時間可長可短,-,相對於周期,10,Sources of voltage variations,電壓變動的來源,Rotating machines working as generators and feeding back energy into the,mains,馬達因旋轉關係形成產生器並回授能量進入供電端,V,11,Voltage variations testing according to IEC 61000-4-11,Reduction to 40% / 0% of U,nom,Timing:t,1,=2s20%t,2,=1s20%t,3,=2s20%,Steps of voltage change during t1 & t3 shall be /= 10% of U,nom,0%,12,Testing Setup,測試佈局,Isolation Transformer,隔離變壓器,Modula 6000,EUT,AC for Modula,AC for EUT,Step /Variable Transformer,昇/降壓變壓器,As short as possible 越短越好,Ground reference plane,EUT input,EUT Out,13,PQT Voltage dips and interruptions,電壓瞬時跌落 與 短時中斷,IEC 61000-4-11,14,Sources of voltage dips and interruptions,電壓瞬時跌落 與 短時中斷,起因,Sudden large change of load,負载突然大的改變,Short-circuits,短路,V,15,Voltage dips according to IEC 61000-4-11,Dips:,Sudden reduction of voltage followed by,voltage recovery after a short period of time,電壓突然瞬降經過一段時間後恢復正常,.,16,Short interruptions according to IEC 61000-4-11,電壓短時中斷,Short Interruptions:,The disappearance of the supply voltage,for a period of time typically not exceeding 1 min.,電源短時中斷線壓(消失時間)不得超出1分鐘,17,Immunity testing principle for voltage dips & interruptions,電壓瞬降 及 短時中斷 抗擾性測試原理,Test system,V,EUT,Mains,18,IEC 61000-4-11 application,Applied to equipment with rated input current 16A per phase,Does not apply to 400Hz AC and DC lines.,19,PQT terms,Angle發生,角度,T-event,事件持續時間,T-Rep,事件重覆之時間,F-SyncSynchronous or Asynchronous (depends on manufacturer),頻率同步或非同步,UinNominal voltage,正常輸入電壓,UvarVariable voltage,變動之電壓,Duration3 counts,20,PQT,Testing levels in the latest published standard,IEC 61000-4-11,21,Voltage Dips (For 50 Hz mains),Class,Test level and durations for voltage dips,Class 1,Case-by-case according to the equipment requirements,Class 2,0% during cycle,0% during 1 cycle,70% during 25 cycles,Class 3,0% during cycle,0% during 1 cycle,40% during 10 cycles,70% during 25 cycles,80% during 25 0 cycles,Class X (To be defined by product committee ),X,X,X,X,X,22,Short Interruptions,Class,Test level and durations for short interruptions,Class 1,Case-by-case according to the equipment requirements,Class 2,0% during 250 cycles,Class 3,0% during 250 cycles,Class X,X,23,Voltage Variations (Optional) (For 50 Hz mains),Voltage test level,Time for decreasing voltage,Time at reduced voltage,Time for increasing voltage,70%,Abrupt,1 cycle,25 cycles,X,X,X,X,24,
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