EPS硬件设计要点_英飞凌

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1、HardwareconsiderationsElectricPowerSteeringEPSWorkshopChinaPoweronDemandElectricPowerSteeringDemandorientedtorqueVbatPWMcontrolledelectricmotorControlledctrlDCMotorReducedAveragePowerConsumptiondownto<50WDCMotorContinuouslyMMechanicalctrlGNDHydraulicPumpTotalEquivalentElectricVbatPowe

2、rSaving~250WBrushlessDCMotordrvdrvdrvabnc3PhaseMotordrvdrvdrvGNDSource:ZFLSCO-reduction~5.9g/km2Oct.201026.09.2011Copyright©InfineonTechnologies2011.Allrightsreserved.Page2ElectricPowerSteeringSystemFocusofthissessionIntheFocusnow+12VfromBatteryElectricPowerSupplysPowerTLE7368TLE42344SteeringT

3、LE425xWillbecoveredECUOptiMOS™-T240VSteeringAngleinsensorsession13xSensorFailSafeIPB180N04S4-012xiGMRSensorCIC61508TLE5011SafetyTLE5012SteeringCompanion2xiGMRAngleSensor3-Phaset8-bitMCUDriverICcTLE5012eeXC886/8TLE7183snSensoranoМhPcInterfaceTLE7189isTorqueSensorTriCore™dTorqueTC1724TLE5011Roto

4、rPositionTLE4998TLE4997RotorPositioniGMRSensorCurrentSenseTLE5012CurrentSenseTLE5009WillbecoveredCANFlexsRayTransceiverTransceiverinMCUsessionTLE6251TLE9221FlexRay-BusHS-CANOct.201026.09.2011Copyright©InfineonTechnologies2011.Allrightsreserved.Page3ApplicationrequirementsPowerSteeringBasicreq

5、uirementstopowerstageDrivehigh3-phasemotordrivecurrents100-160AphasecurrentMeasurecurrentFieldorientedcontrolprecicemostly12VapplicationHighfunctionalsafetySecondswitch-offpathTrendshastoworkatlowersupplyvoltages(onlyoneshuntforcurrentmeasurement)increasingaccuracyofcurrentmeasurement

6、highestefficientusageofmotor(0...100%dutycycle)fulfillASILDsafetyrequirementinapplicationOct.201026.09.2011Copyright©InfineonTechnologies2011.Allrightsreserved.Page4AgendaApplicationrequirementsEPS(PermanentMagnetSynchronousMotor)DrivinghighcurrentsSpikes:WhytheyareharmfulLayoutrecommend

7、ationsRequirementstoMOSFETsandDriverICsMeasureCurrentpreciselyHowmanyshuntstouse?HowdoesitworkwithoneshuntRequirementsfordriverICWhattoconsiderwithIFXOpAmpsindriverICsFunctionalSafety:SecondswitchoffpathStar-Pointrelayvs.MOSFETsOct.201026.09.2011Copyright