电机控制传感器反馈电路

Sensorsareacriticalcomponentinamotorcontrol

system.Theyareusedtosensethecurrent,position,

speedanddirectionoftherotatingmotor.Recent

advancementsinsensortechnologyhaveimproved

theaccuracyandreliabilityofsensors,whilereducing

thecost.Manysensorsarenowavailablethatintegrate

thesensorandsignal-conditioningcircuitryintoasingle

package.

Inmostmotorcontrolsystems,severalsensorsare

usedtoprovidefeedbackinformationonthemotor.

Thesesensorsareusedinthecontrolloopandto

improvethereliabilitybydetectingfaultconditionsthat

maydamagethemotor.Asanexample,Figure1pro-

videsablockdiagramofaDCmotorcontrolsystemto

showthesensorfeedbackprovidedforatypicalmotor

control.MAN894MotorControlSensorFeedbackCircuitsAlistofthesensorsthatcanbeusedtofeedbackAuthor:JimLepkowskiinformationtoamicrocontrollerarelistedbelow:MicrochipTechnologyInc.Currentsensors-ShuntresistorINTRODUCTION-Current-sensingtransformerSensorsareacriticalcomponentinamotorcontrol