當dang今jin傳chuan動dong工gong程cheng中zhong最zui常chang用yong的de就jiu是shi三san相xiang交jiao流liu感gan應ying電dian動dong機ji。在zai許xu多duo場chang合he中zhong，由you於yu其qi啟qi動dong特te性xing，這zhe些xie電dian動dong機ji湧yong直zhi接jie連lian接jie電dian源yuan係xi統tong。如ru果guo直zhi接jie在zai線xian啟qi動dong，將jiang會hui產chan生sheng高gao達da電dian機ji額e定ding電dian流liu6倍bei的de浪lang湧yong電dian流liu。該gai電dian流liu會hui使shi供gong電dian係xi統tong和he串chuan聯lian的de開kai關guan設she備bei過guo載zai。如ru果guo直zhi接jie啟qi動dong，也ye會hui產chan生sheng較jiao高gao的de峰feng值zhi轉zhuan矩ju
，這zhe種zhong衝chong擊ji不bu但dan會hui對dui驅qu動dong電dian動dong機ji產chan生sheng衝chong擊ji，而er且qie也ye會hui使shi用yong機ji械xie裝zhuang置zhi受shou損sun。
HPMV中

、高(gao)壓(ya)軟(ruan)啟(qi)動(dong)器(qi)是(shi)用(yong)多(duo)個(ge)可(ke)控(kong)矽(gui)串(chuan)並(bing)聯(lian)而(er)成(cheng)
，可(ke)以(yi)滿(man)足(zu)不(bu)同(tong)的(de)電(dian)流(liu)及(ji)電(dian)壓(ya)要(yao)求(qiu)
，控(kong)製(zhi)可(ke)控(kong)矽(gui)的(de)觸(chu)發(fa)角(jiao)就(jiu)可(ke)以(yi)控(kong)製(zhi)輸(shu)出(chu)電(dian)壓(ya)的(de)大(da)小(xiao)。當(dang)電(dian)機(ji)啟(qi)動(dong)過(guo)程(cheng)中(zhong)，HPMV按照預先設定的啟動曲線增加電機的端電壓使電機平滑加速

，從而減少了電機啟動時對電網、電機本身、相連設備的電氣及機械衝擊。當電機達到正常轉速後，旁路接觸器接通。電機啟動完畢後，HPMVruanqidongqijixujiankongdianjibingtigonggezhongguzhangbaohu。zairuantingjishishouxiananzhaoyuxianshedinghaodetingjiquxianpinghuadijiangdidianjideduandianyazhidaodianjitingji。ruantingkeyijiejueturantingjiyinqideshuibengshuichuixianxiangjijixiechongjidengxiangguanwenti。