UV qhov sib txawv hloov lub zog hluav taws xob hloov pauv hloov sib hloov hauv cov hluav taws xob loj los ntawm AC → DC → AC, thiab cov khoom tawm yog cov ntshiab sine yoj. Cov zis zaus thiab qhov ntsuas hluav taws xob tau kho nyob rau hauv qee qhov kev ntsuas. Nws yog qhov txawv ntawm qhov hloov dua siab tshiab hloov ceev ceev siv rau lub zog tswj lub zog, thiab nws kuj txawv ntawm qhov zoo tib yam AC stabilized fais fab mov. Qhov zoo tagnrho AC fais fab mov yog tus yam ntxwv lub cev, qhov ruaj khov voltage, xoom sab hauv tsis kam, thiab ntshiab sine yoj (tsis muaj qhov tsis sib xws) hauv qhov voltage voltage. Cov hluav taws xob zaus hloov fais fab mov yog ze heev rau cov fais fab zoo tagnrho AC. Yog li no, hauv cov teb chaws tshaj lij, cov hloov hluav taws xob zaus hloov pauv tau siv ntau dua li cov qauv kev siv hluav taws xob thiaj li muab qhov zoo tshaj plaws fais fab ib puag ncig rau cov khoom siv hluav taws xob thiab pab txhawb lub hom phiaj ntsuas kev ua haujlwm ntawm cov cuab yeej hluav taws xob. Nws muaj ob hom tseem ceeb ntawm cov khoom siv hluav taws xob hloov pauv ntau dua: linear amplifier type thiab SPWM hloov hom.
Uninterruptible power supply yog cov khoom siv sib txuas rau cov roj teeb roj (feem ntau ua rau cov kua qaub-tswj kev tiv thaiv-tsis pub roj teeb) rau tus tswv tsev, thiab hloov DC lub hwj chim rau lub zog loj los ntawm cov hluav taws xob Circuit Court xws li tus tswv inverter. Nws yog feem ntau siv los muab kev ruaj khov thiab tsis txuas lub zog rau ib qho khoos phis tawj, khoos phis tawj network lossis lwm lub zog hluav taws xob xws li solenoid li qub, lub tshuab xa hluav taws xob, thiab lwm yam. nws rau lub nra. Lub sijhawm no, UPS yog AC lub ntsiab hluav taws xob voltage stabilizer, thiab nws kuj tseem them lub roj teeb sab hauv lub tshuab; thaum lub zog tseem ceeb (tsis txaus ntseeg lub hwj chim tsis ua hauj lwm) Tam sim ntawd, UPS tseem yuav txuas hluav taws xob 220V AC rau lub nra los ntawm cov inverter xoom hloov txoj kev hloov los ntawm cov roj teeb' s DC zog, kom lub load tuaj yeem tswj cov haujlwm ib txwm ua thiab tiv thaiv lub nra' s software thiab kho vajtse tsis txhob raug. UPS cov khoom siv feem ntau muab kev tiv thaiv tiv thaiv dhau-voltage lossis qis-voltage.
