2006 · 12 citations · 0 references
EngineeringElectrical EngineeringElectric Vehicle TechnologyMotor ControlPower ElectronicsBrushless Dc MachinesDrive SystemsElectric DrivesElectric Motor Drive SystemsElectric Motor DrivesElectric MotorsBrushed Dc MotorsBrushless Direct Current MachinesBrushless Direct Current MotorsCommutation ControlCommutation ProcessCurrent SensingTorque RippleTorque Ripple Reduction
The theory of commutation process in Brushless DC Motor(BLDCM)was analyzed.After the study of the commutation current prediction law in high speed regions and low speed regions,a novel control scheme,which was composed of the commutation current prediction and the negative DC current elimination,was proposed to suppress the commutation torque ripples.In the proposed method,the negative DC current was eliminated and the ascending speed of current in the upcoming phase and descending speed of current in the outgoing phase are equal in commutation interval to keep the non-commutation phase current constant,which is based on the non-commutation phase current sensing.The simulated and experimental results verified the validity of the proposed method.