PIC18单片机的三相异步电机速度控制

Inductionmotorsarethemostwidelyusedmotorsfor

appliances,industrialcontrol,andautomation;hence,

theyareoftencalledtheworkhorseofthemotionindus-

try.Theyarerobust,reliable,anddurable.Whenpower

issuppliedtoaninductionmotorattherecommended

specifications,itrunsatitsratedspeed.However,

manyapplicationsneedvariablespeedoperations.For

example,awashingmachinemayusedifferentspeeds

foreachwashcycle.Historically,mechanicalgearsys-

temswereusedtoobtainvariablespeed.Recently,

electronicpowerandcontrolsystemshavematuredto

allowthesecomponentstobeusedformotorcontrolin

placeofmechanicalgears.Theseelectronicsnotonly

controlthemotor’sspeed,butcanimprovethemotor’s

dynamicandsteadystatecharacteristics.Inaddition,

electronicscanreducethesystem’saveragepower

consumptionandnoisegenerationofthemotor.MAN843SpeedControlof3-PhaseInductionMotorUsingPIC18MicrocontrollersAuthor:PadmarajaYedamaleInductionMotorBasicsMicrochipTechnologyInc.NAMEPLATEPARAMETERSAtypicalnameplateofaninductionmotorliststhefollowingparameters:INTRODUCTIONRatedterminalsupplyvoltageinVoltsInductionmotorsarethemostwidelyusedmotorsforRatedfrequencyofthesupplyinHz