无刷电调

MEGA8DeignofControlSytemBaedonMEGA8SingleChipComputerforSenorleandBruhleDCMotor210096PWMMEGA8MEGA8AbstractSensorlessandbrushlessDCmotorusedformodelaircraftfeaturessmallsizeweightlessefficientandcredible.Adedicatedspeed-adjustmentcontrolsystemofthemotorisdesignedanddeveloped.ThepositiondetectingmethodforsensorlessandbrushlessDCmotorPWMschemeandstartupstrategyarean-alyzedinthispaper.ThehardwaresystemisdevelopedwithMEGA8singlechipcomputerasthekernel.Theschematicsofcriticalcontrolcircuitsaregivenanddescribedindetail.Thetestresultsofcontrollingvariousmodelaircraftareillustrated.KeywordsSenseorlessBrushlessDCmotorBLDCMControlsystemMEGA80BLDCMbrushlessDCmotor1MC68HC908GP322DSPDSPMEGA8MEGA813113wt=0º+→T1→U→V→T4→-wt=60º+→T1→U→W→T6→-wt=120º+→T3→V→W→T6→-wt=180º+→T3→V→U→T2→-wt=240º+→T5→W→U→T2→-wt=300º+→T5→W→V→T4→-wt=360º+→T1→U→V→T4→-1.131MEGA842120º30º623UeU=uU-12uV+uW11.2PWM521660º120ºPWM2MCUPWMMCUPWMPWMPWMPWM1.322.1MEGA8PN2.2332.3MEGA8MEGA88kBFLASH16MHz16MIPSmillioninstructionspersecondTQFPMEGA828A/DMEGA823I/OI/O3MEGA8ISP2.4MEGA8ADADC412612200512PROCESSAUTOMATIONINSTRUMENTATIONVol.26No.12December2005MEGA8ADADADMCU1AD4UULM339412uU=uV+uWuU+→-UuU-→+U2.51PNPOWERMOSFET5MEGA83PWM16PWMPWMPWM52.6MEGA860000r/min1100µs～1900µsMEGA8MEAGE816MHz80.5µs0.5%6PWM6730ºMOSFET7①②③51MEGA8④MEGA831100µs～1900µs8aPhoenixPhoenix-10TM8b1100µs～1200µs1200µs～1800µs1800µsPhoenix-10TM84ELE8507.3+9047GS20307.14+9047ElE10009+9047TOWER-PRO+90477.4V2500mah4VF/4VF1～229494MEGA81.MC68HC908GP32..2002122.DSP..200473..19994.BLDCM..200495...20046ATMEGA8Datasheet.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!2005SUPCON20051130SUPCONSettedolleControlEngineeringChinaControlEngineeringChinaECS-1004/2005SUPCON2006612612200512PROCESSAUTOMATIONINSTRUMENTATIONVol.26No.12December2005