Variable-frequency Drive (VFD) yog cov khoom siv tswj fais fab uas siv cov tshuab hloov pauv zaus thiab cov tshuab microelectronics los tswj AC motors los ntawm kev hloov cov zaus ntawm lub cev muaj zog ua haujlwm.
Lub zaus converter yog tsim los ntawm rectification (AC rau DC), filtering, inverter (DC rau AC), nres chav tsev, tsav chav tsev, nrhiav kom tau, microprocessor unit, thiab lwm yam. ntawm cov zis fais fab mov, raws li qhov xav tau tiag tiag ntawm lub cev muaj zog los muab lub zog hluav taws xob uas nws xav tau, kom ua tiav lub hom phiaj ntawm kev txuag hluav taws xob thiab kev tswj ceev, ntxiv rau, lub inverter muaj ntau yam kev tiv thaiv, xws li overcurrent, overvoltage, overload tiv thaiv thiab lwm yam. Nrog rau kev txhim kho txuas ntxiv ntawm kev lag luam automation, zaus converters kuj tau siv dav.