電壓瞬時(shí)跌落,短時(shí)中斷和電壓漸變的抗擾性試驗(yàn)ppt課件

1、IEC 61000-4-11Voltage Dips, Short interruptions and voltage variations immunity tests電壓瞬時(shí)跌落電壓瞬時(shí)跌落, ,短時(shí)中斷和電壓漸變的短時(shí)中斷和電壓漸變的抗擾性試驗(yàn)抗擾性試驗(yàn)Prepared byPrepared byRICHTECRICHTEC測(cè)試目的及應(yīng)用場(chǎng)合與低電壓電網(wǎng)連接之電氣電子設(shè)備會(huì)遭到電網(wǎng)中電壓瞬時(shí)跌落,短時(shí)中斷和電壓漸變之影響,他們是由於供電電網(wǎng),變電設(shè)備發(fā)生缺點(diǎn)或負(fù)荷忽然發(fā)生大的變動(dòng)或是負(fù)荷連續(xù)變化所影起的,此IEC61000-4-11標(biāo)準(zhǔn)規(guī)定了電氣電子設(shè)備對(duì)此三種電網(wǎng)電壓變化的抗干擾試驗(yàn)方

2、法提供可供選擇之試驗(yàn)等級(jí)應(yīng)用場(chǎng)合 該標(biāo)準(zhǔn)適用於 額定輸入電流每相不超過(guò) 16A 之電氣電子設(shè)備, -不適用: 由直流及400Hz 網(wǎng)絡(luò)供電之設(shè)備術(shù)語(yǔ)電壓瞬時(shí)跌落(Voltage Dips): 電氣系統(tǒng)某一點(diǎn)的電壓忽然下降,經(jīng)過(guò)半個(gè)週期到幾秒鐘之短暫持續(xù)期後又恢復(fù)正常短時(shí)中斷(Interruption): 供電電壓消逝一段時(shí)間,普通不超過(guò)1分鐘,短時(shí)中斷可以認(rèn)為是100%幅值電壓瞬時(shí)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(xù)時(shí)間相對(duì)於周期來(lái)說(shuō),可長(zhǎng)可短試驗(yàn)等級(jí)試驗(yàn)等級(jí) (%UT)電壓瞬時(shí)跌落 和 短時(shí)中斷 (%)持續(xù)時(shí)間 (週期)01000

3、.5*14060510703025508020250-300電壓瞬時(shí)跌落(Voltage Dip)230Vac161Vac代表電壓瞬時(shí)代表電壓瞬時(shí)跌落跌落 30%30%持續(xù)持續(xù)1010個(gè)週期個(gè)週期代表再過(guò)代表再過(guò)0 0處跌變處跌變電壓漸變 (Voltage Variation)短期供電電壓漸變之時(shí)間設(shè)定電壓試驗(yàn)等級(jí)電壓縮小所需之時(shí)間/s縮小電壓的持續(xù)時(shí)間/s電壓添加所需求之時(shí)間/s40% UT220%120%220%0% UT220%120%220%xxx電壓漸變 Voltage Variations2s電壓縮小所需求之時(shí)間1s電壓縮小持續(xù)時(shí)電壓縮小持續(xù)時(shí)間間2s電壓添加所需求之時(shí)間PQT 電

4、源品質(zhì)測(cè)試 Voltage Variations 電壓漸變IEC 61000-4-11What is voltage variation? 什麼是電壓變動(dòng)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(dòng)持續(xù)時(shí)間可長(zhǎng)可短-相對(duì)於周期Sources of voltage variations 電壓變動(dòng)的來(lái)源 Rotating machines working as generators

5、 and feeding back energy into the mains 馬達(dá)因旋轉(zhuǎn)關(guān)係構(gòu)成產(chǎn)生器並回授能量進(jìn)入供電端VVoltage variations testing according to IEC 61000-4-11Reduction to 40% / 0% of UnomTiming:t1=2s20%t2=1s20%t3=2s20%Steps of voltage change during t1 & t3 shall be /= 10% of UnomUt100%40%t1t2t30%Testing Setup 測(cè)試佈局Isolation Transformer隔

6、離變壓器Modula 6000EUTAC for ModulaAC for EUTStep /Variable Transformer昇/降壓變壓器As short as possible 越短越好Ground reference planeEUT inputEUT OutPQT Voltage dips and interruptions電壓瞬時(shí)跌落 與 短時(shí)中斷IEC 61000-4-11Sources of voltage dips and interruptions電壓瞬時(shí)跌落 與 短時(shí)中斷原因 Sudden large change of load 負(fù)載忽然大的改變 Short-ci

7、rcuits 短路VVoltage dips according to IEC 61000-4-11 Dips: Sudden reduction of voltage followed by voltage recovery after a short period of time 電壓忽然瞬降經(jīng)過(guò)一段時(shí)間後恢復(fù)正常電壓忽然瞬降經(jīng)過(guò)一段時(shí)間後恢復(fù)正常.Short interruptions according to IEC 61000-4-11 電壓短時(shí)中斷Short Interruptions: The disappearance of the supply voltage for a p

8、eriod of time typically not exceeding 1 min.電源短時(shí)中斷線壓電源短時(shí)中斷線壓(消逝時(shí)間消逝時(shí)間)不得超出不得超出1分鐘分鐘Immunity testing principle for voltage dips & interruptions 電壓瞬降 及 短時(shí)中斷 抗擾性測(cè)試原理 Test systemVEUTMainsIEC 61000-4-11 application Applied to equipment with rated input current 16A per phase Does not apply to 400Hz AC

9、 and DC lines.PQT termsAngle 發(fā)生角度T-event 事件持續(xù)時(shí)間 T-Rep事件重覆之時(shí)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(dòng)之電壓Duration3 counts PQT Testing levels in the latest published standardIEC 61000-4-11Voltage Dips (For 50 Hz mains)Class Tes

10、t level and durations for voltage dips Class 1Case-by-case according to the equipment requirementsClass 20% during cycle0% during 1 cycle70% during 25 cyclesClass 30% during cycle0% during 1 cycle40% during 10 cycles70% during 25 cycles80% during 25 0 cyclesClass X (To be defined by product committee )XXXXXShort InterruptionsClassTest level and durations for short interruptions Class 1Case-by-case according to the equipment requirementsClass 20% during 250 cyclesClass 30% during 250 cyclesClass XXVolt