.So,atransducerisdesignedasanexecutorintheaircompressorcontrolsystemtoadjustoutputairpressure.Inordertocontroltheairpressureinthepipeline,themotor’srotationspeedshouldbeincontrol.However,themotordisablestochangeitsrotationspeeditself,theonlymethodistoadjustitsfrequencytochangetherotationspeed.So,atransducerusedtocontrolthemotor’srotationspeed,then,thefluxfromaircompressorcanbeadjusted.ThesystemschematicdiagramisshowninFigure.Aftercomparingenactmentpressuresignalwithfeedbackpressuresignal,apressuresignalerrorisobtained,whichisusedforcalculationofPIDarithmeticandthenconvertedtheerrorsignaltoacontrolvaluetoadjustfrequencyofACpowersupply.Thentheasynchroniesmotorwilldriveaircompressortoanappropriaterotationspeedwithvariablefrequencypowersupplytoeliminatethepressureerrorandensureaconstantairpressure.TheairpressureadjustedbyPIDarithmeti。
然后,从U、V和W