Umhlinzeki weyunithi ye-frequency converter braking unit ukukhumbuza ukuthi indlela esetshenziselwa ukubhuleka ukusetshenziswa kwamandla ukufaka ingxenye yeyunithi yokubhuleka ohlangothini lwe-DC lwesiguquli sefrikhwensi, edla amandla kagesi avuselelwe kusibamba samandla ukuze kuzuzwe ukubhuleka. Lena indlela eqondile kakhulu yokuphatha amandla azivuselelayo, okuwukusebenzisa amandla avuselelwayo ngokusebenzisa isekethe yokubhuleka yokusetshenziswa kwamandla ozinikele ku-resistor bese uyiguqulela kumandla ashisayo. Ngakho-ke, kwaziwa nangokuthi i-resistance braking, ehlanganisa iyunithi yokubhuleka kanye ne-resistor yokubopha.
(1) Iyunithi yamabhuleki. Umsebenzi weyunithi yokubhuleka uwukuxhuma isekethe yokulahla amandla lapho i-voltage Ud yesekethe ye-DC idlula umkhawulo oshiwo (ofana no-660V noma 710V), okuvumela isekethe ye-DC ukuthi ikhulule amandla ngendlela yamandla ashisayo ngemva kokudlula ku-resistor braking. Iyunithi yokubhuleka ingahlukaniswa ngezinhlobo ezimbili: yangaphakathi neyangaphandle. Uhlobo lwangaphakathi lufanele iziguquli zemvamisa yenhloso evamile enamandla aphansi, kuyilapho uhlobo lwangaphandle lufanele iziguquli zefrikhwensi ezinamandla amakhulu noma izimo zokusebenza ezinezidingo ezikhethekile zokubhuleka. Empeleni, awukho umehluko phakathi kwalokhu okubili. Iyunithi yokubhuleka isebenza "njengeswishi" yokuxhuma isixhasi sokubhuleka, okuhlanganisa i-transistor yamandla, isekethe yokuqhathanisa isampula ye-voltage, nesekethe yokushayela.
(2) I-Braking resistor. I-Braking resistor iyinkampani yenethiwekhi esetshenziselwa ukusebenzisa amandla okuvuselela enjini kagesi ngendlela yamandla ashisayo, okuhlanganisa nemingcele emibili ebalulekile: inani lokumelana namandla amandla. Ngokuvamile, izinto eziphikisayo zikathayela kanye ne-aluminium alloy resistors zivame ukusetshenziswa kakhulu kubunjiniyela. Izinto ezimelana nothayela zisebenzisa ukukhohlakala okungaphezulu ukuze kube lula ukunqanyulwa kokushisa nokunciphisa i-parasitic inductance. Izembatho ze-inorganic retardant eziphakeme zomlilo nazo zikhethiwe ukuze zivikele ngokuphumelelayo izintambo zokumelana nokuguga futhi zandise impilo yazo yesevisi; I-aluminium alloy resistors inokumelana nesimo sezulu esingcono kanye nokumelana nokudlidliza kunezinqamuleli zefreyimu ye-ceramic yendabuko, futhi isetshenziswa kabanzi ezindaweni zokulawula zezimboni ezinokhahlo ezinezidingo eziphezulu. Kulula ukuzifaka ngokuqinile, kulula ukunamathisela osinki bokushisa, futhi abe nokubukeka okuhle.
Inqubo ye-braking yokusetshenziswa kwamandla iwukuthi: lapho i-motor kagesi incipha noma ihlehla (kuhlanganise nokuhudulwa) ngaphansi kwamandla angaphandle, i-motor kagesi igijima esimweni sokukhiqiza, futhi amandla anikezwa emuva kumjikelezo we-DC, okwenza ukuba i-voltage yebhasi ikhuphuke; Iyunithi yokubhuleka isampula ugesi webhasi. Lapho i-voltage ye-DC ifinyelela inani le-conduction elibekwe iyunithi yokubhuleka, ishubhu yokushintsha amandla yeyunithi yokubhuleka, futhi yamanje igeleza ku-resistor yokubhuleka; I-resistor yokubhuleka iguqula amandla kagesi ibe amandla ashisayo, inciphisa ijubane lemoto futhi yehlise i-voltage yebhasi ye-DC; Lapho i-voltage yebhasi yehla enanini elinqanyuliwe elibekwe iyunithi yokubhuleka, i-transistor yamandla eshintshayo yeyunithi yokubhuleka iyanqanyulwa, futhi akukho okwamanje okugeleza ku-resistor yokubhuleka.