Umphakeli wemishini esekela i-frequency converter ukukhumbuza ukuthi isivinini sokujikeleza kwemoto silingana nemvamisa, ngakho-ke ukushintsha imvamisa kungashintsha ngqo isivinini sokujikeleza kwemoto. Ngokuvamile, izinjini zikagesi zisebenzisa iziguquli zemvamisa ukuze zilawule isivinini futhi zinciphise ukuqala kwamanje.
Ukuze kukhiqizwe i-voltage eguquguqukayo nefrikhwensi, isinyathelo sokuqala ukuguqula i-alternating current of the power supply ibe yi-direct current (DC), okubizwa ngokuthi ukulungiswa kabusha. Igama lesayensi ledivayisi eguqula i-direct current (DC) ibe i-alternating current (AC) ithi "inverter".
I-inverter ejwayelekile iyi-inverter eguqula ugesi we-DC ube ifrikhwensi engaguquki kanye ne-voltage. Kuma-inverter, angahlaziywa njenge-frequency adjustable kanye ne-voltage adjustable, futhi lolu hlobo lwe-inverter silubiza ngokuthi isiguquli se-frequency.
Ukukhishwa kwe-waveform ngesiguquli se-frequency kuyigagasi le-analog sine, elisetshenziselwa kakhulu ukulawula isivinini se-asynchronous motors ezigaba ezintathu, ezaziwa nangokuthi iziguquli zemvamisa.
Kuma-inverter aguquguqukayo anezidingo eziphezulu ze-waveform ezisetshenziswa kakhulu kumishini yokuthola izinsimbi, i-waveform idinga ukuhlelwa ukuze ikhiphe amaza e-sine ajwayelekile, abizwa ngokuthi i-variable frequency power supply.
Ngokuvamile, intengo yokunikezwa kwamandla okuguquguqukayo okuguquguqukayo izikhathi ezingu-15-20 kunedrayivu yefrikhwensi eguquguqukayo. Ngenxa yokuthi idivayisi eyinhloko eyenza izinguquko ze-voltage noma imvamisa kumishini yokuguqula imvamisa ibizwa ngokuthi "inverter", umkhiqizo ngokwawo ubizwa ngokuthi "inverter", okuyilokho esikubiza ngokuthi: i-frequency converter.