Umphakeli weyunithi yempendulo ukukhumbuza ukuthi isiguquli ngasinye se-frequency sineyunithi yokubhuleka (amandla aphansi yi-resistor yokubhuleka, amandla aphezulu i-transistor yamandla aphezulu i-GTR kanye nomjikelezo wayo wokushayela), amandla aphansi akhelwe ngaphakathi, futhi amandla aphezulu angaphandle. Isimiso seyunithi yokubhuleka: Lapho umshini osebenzayo udinga ukubhuleka ngokushesha, futhi phakathi nesikhathi esidingekayo, amandla okuvuselela kabusha esiguquli sefrikhwensi awakwazi ukugcinwa ku-capacitor emaphakathi ngaphakathi kwebanga le-voltage elishiwo noma isixhasi sangaphakathi sokubhuleka asikwazi ukusisebenzisa ngesikhathi, okubangela ukugcwala ngokweqile engxenyeni ye-DC, ingxenye ye-braking yangaphandle idinga ukwengezwa ukuze kusheshiswe ukusetshenziswa kwamandla kagesi okuvuselelayo. Lapho isiguquli sefrikhwensi sishayela injini ukuze ibe sesimweni sokubhuleka (isimo sokukhiqiza amandla), njengalapho i-hoist yehla noma lapho umthwalo one-inetia ephezulu ima ngokushesha. Amandla e-Kinetic (amandla angaba khona) azoguqulwa abuyele kumandla kagesi futhi abuyele ebhasini le-DC lesiguquli sefrikhwensi, okubangele ugesi webhasi ophezulu. Uma i-frequency converter yakho ineyunithi yokubhuleka, lapho ithola ukuthi i-voltage yebhasi ingaphezu komkhawulo othile, izoxhuma iswishi phakathi kwe-braking resistor nebhasi, futhi amandla azosetshenziswa nge-resistor yokubhuleka. Ngalesi sikhathi, i-resistor ye-braking izoshisa.
Ngokuvamile, i-resistor yokubhuleka ayikukhiqizi ukushisa. Uma i-resistor ye-braking ikhiqiza ukushisa ngesikhathi sokusebenza okujwayelekile, kusho ukuthi iyunithi yokubhuleka iphukile noma kunenkinga ye-hardware ebangela ukuthi i-resistor yokubhuleka ihlale ixhumeke ebhasini le-DC. Ngakho-ke, ukusebenza kwesiguquli sakho semvamisa akuyona inkinga enkulu, kepha ukusetshenziswa kwamandla kuphezulu impela.
Lapho okuphumayo kwesiguquli sefrikhwensi kulawula injini ekusheshiseni noma esimweni sesivinini esingaguquki, i-resistor yokubhuleka ayisebenzi. Kodwa-ke, lapho i-motor incipha noma ima ngokushesha, ngenxa yesimo sokuvuselela kabusha se-motor, i-voltage yesekethe ye-DC kusiguquli se-frequency izokhuphuka, futhi i-resistor ye-braking izosebenzisa la mandla anda ngokushisa.
I-asynchronous motor izoba sesimweni sokukhiqiza amandla kabusha, ikhiqize impendulo yamanje. Lokhu kwamanje kubuyela kumjikelezo we-DC ngama-reflux diode (D1-D6) futhi kushaja i-capacitor eyinhloko, okubangela ukuba i-DC voltage inyuke. Ukuze ugweme i-voltage ephezulu kanye nokulimala kusiguquli sefrikhwensi, i-resistor R yamabhuleki ixhunywe ohlangothini lwesekethe ye-DC. Uma amandla kagesi e-DC edlula inani elithile, i-transistor switch ye-TR iyavulwa futhi ixhunywe kusimelaphi sokubhuleka, futhi amandla empendulo asetshenziswa ngendlela yamandla ashisayo ku-resistor R.
Ngesikhathi senqubo yokunciphisa imvamisa yokusebenza, injini ye-braking resistor izoba sesimweni sokubhuleka kabusha, futhi amandla e-kinetic wesistimu yokushayela azobuyiselwa kusekethe ye-DC, okubangele ukuthi i-DC voltage UD iqhubeke ikhuphuka futhi ifinyelele ngisho nezinga eliyingozi. Ngakho-ke, kuyadingeka ukusebenzisa amandla avuselelwe kusekethe ye-DC ukuze kugcinwe i-UD ngaphakathi kwebanga elivumelekile. I-resistor yokubhuleka isetshenziselwa ukudla la mandla. Iyunithi yokubhuleka iqukethe i-transistor enamandla amakhulu i-GTR kanye nesekethe yayo yokushayela. Umsebenzi wayo ukuhlinzeka ngendlela yokuthi i-IB yamanje yokukhipha igeleze ku-resistor braking.