Abahlinzeki bemishini esekela i-frequency converter bakukhumbuza ukuthi ezinhlelweni zendabuko zokulawula imvamisa ezakhiwe iziguquli ezijwayelekile, ama-asynchronous motors, nemithwalo yemishini:
Lapho umthwalo ongase ube khona odluliselwa yimoto kagesi wehliswa, injini kagesi ingase ibe sesimweni sokubhuleka kabusha; Noma lapho injini ima noma yehla isuka ejubaneni elikhulu iye ejubaneni eliphansi, imvamisa ingase yehle ngokuzumayo, kodwa ngenxa ye-inertia yomshini wenjini, ingase ibe sesimweni sokukhiqiza amandla kabusha.
Amandla emishini agcinwe ohlelweni lokudlulisa aguqulwa abe amandla kagesi ngenjini kagesi futhi abuyiselwe kusekethe ye-DC yesiguquli sefrikhwensi ngama-freewheeling diode ayisithupha e-inverter. Kuleli qophelo, i-inverter isesimweni esilungisiwe. Uma zingekho izinyathelo ezithathwayo ukuze kudle amandla ku-inverter, la mandla azobangela ukuba i-voltage ye-capacitor yokugcina amandla kusekethe emaphakathi ikhuphuke.
Uma ibhuleki ishesha kakhulu noma umthwalo owenziwe ngomshini uwukukhuphuka, la mandla angase abangele umonakalo kusiguquli sefrikhwensi, ngakho-ke kufanele sicabangele ukulahla la mandla.
Eziguqulini ezijwayelekile, kunezindlela ezimbili ezivame ukusetshenziswa kakhulu zokucubungula amandla avuselelwe:
(1) Ukuhlakazeka kokuthi "i-braking resistor" esethwe ngokwenziwa ngokuhambisana ne-capacitor kusekethe ye-DC kubizwa ngokuthi i-dynamic braking state.
(2) Ukufaka iyunithi yempendulo ukuze ubuyisele kugridi yamandla kubizwa ngokuthi isimo se-feedback braking (esaziwa nangokuthi isimo sokuvuselela kabusha sokubhuleka).
Kukhona enye indlela yokubhuleka, okuyi-DC braking, engasetshenziswa ezimeni lapho kudingeka khona ukupaka okunembile noma lapho i-brake motor ijikeleza ngokungavamile ngenxa yezinto zangaphandle ngaphambi kokuqala.