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)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(liu)6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，HPMV軟ruan啟qi動dong器qi繼ji續xu監jian控kong電dian機ji並bing提ti供gong各ge種zhong故gu障zhang保bao護hu。在zai軟ruan停ting機ji時shi首shou先xian按an照zhao預yu先xian設she定ding好hao的de停ting機ji曲qu線xian平ping滑hua地di降jiang低di電dian機ji的de端duan電dian壓ya直zhi到dao電dian機ji停ting機ji。軟ruan停ting可ke以yi解jie決jue突tu然ran停ting機ji引yin啟qi的de水shui泵beng水shui錘chui現xian象xiang及ji機ji械xie衝chong擊ji等deng相xiang關guan問wen題ti。