Manual

1 On-Line OJTM anual52/73 BLDC .Chapter 4. Chapter 4. 1. BLDC ?2. BLDC 3. Inverter 4. ?On-Line OJTM anual53/73 BLDC ? : BRUSHLESS DC MOTOR (DC MOTOR ) ROTOR MAGNET . STATOR , ROTOR . INVERTER SWITCHING .( DRIVE )S N N BLDC MOTOR (MAGNETiCTORQUE)ROTORSTATOR NEMA StandardA Brushless DC Motoris a Rotating Self-Synchronous Machine with aPermanent Magnetand with Known Rotor Shaft Positions for ? Why is BLDC Motor needed?On-Line OJTM anual54/73 FilBTrF= = BFil B : i : l : ( ) F : r : T : Motor Torque( )MAGNETIC TORQUEW=12 LiTdWd12idLdm2m2==qqi =0 TWm : L : i : T : RELUCTANCE TORQUE BLDC ?On-Line OJTM anual55/73 BLDC ? SPM* ( )IPM** ( )* SPM : Surface Permanent Magnet** IPM : Interior Permanent MagnetNNSSM agnetNNSSM agnet Torque090180 (Deg)Torque ReluctanceTorqueMagneticTorque090180 (Deg)Torque MagneticTorque Motor Magnet Can Loss Motor Torque (5~10%) Motor (1~3%)-Reluctance Torque / Can ( , ) Motor On-Line OJTM anual56/73 GateDrivePFC Micom Braking / Sensor Motor Induction BLDC SRMS witching Transistor MOSFET IGBT IPM Peak Dynamic Braking / Linear Regulator SMPS Harmonics PWM / / Motor Vector Flux WeakeningAC BLDC & AC DCV, f BLDC ?

2 On-Line OJTM anual57/73 BLDC ROTOR BLDC MOTOR .RaRaLaEMFaRb LbEMFbRcLcEMFcABCIaIbIc 1. BLDC Motor Ra, Rb, RcLa, Lb, LcEMFa,EMFb,EMFcIa,Ib,Ic: STATOR : INDUCTANCE: : .VaRaIaLadIadtEMFaVbRbIbLbdIbdtEMFbVcRcI cLcdIcdtEMFc= ++= ++= ++(/)(/)(/) (1)BLDC Motor (Back EMF) rotor stator coil link ( ).. What is BEMF? Explain OJTM anual58/73 BLDC Speed-Torque (1)MOTOR , INDUCTANCE (2) , EMF MOTOR EMF EMF (3) . (3) (2) VabIaRaRbEMFabIaRabEMFab= ++= +() (2) . BLDC MOTOR MOTOR TORQUE . AB MOTOR TORQUE w=- ()/VabIabRabKe (4)Te = Kt Iab (5) , (4), (5) MOTOR (6) .EMFabKe= w (3)EMFabKe= w( : EMF ) (6)w=- (/)/VabTeRabKtKeBLDC Motor On-Line OJTM anual59/73 BLDC Speed-Torque (2) (6) BLDC Speed-Torque Graph.

3 < BLDC MOTOR S-T GRAPH >VdcKt/RabVdc/Ke-KtKe/RabTorqueSpeed 0 rETTTTrERkkVRkREVkTikTkEEdtdiLiRVww - = - = = =++ = BLDC Motor .Vdc> V3 > V2 > V1 VdcV3V2V1 BLDC Motor On-Line OJTM anual60/73 2 BLDC Motor Inverter BLDC Motor .BLDC Motor Torque ripple 6 Switching 2 Switching On Motor .( 2 ).Motor , On 2 Switching DC Link Positive, DC Link Negative On , 9 . , 3 On , 6 Switching . 6 Switching 1 .Switching A+A-B+B-C+C-On Off Off On Off OffOn Off Off Off Off OnOff Off On Off Off OnOff On On Off Off OffOff On Off Off On OffOff Off Off On On Off++ 2. Inverter Motor PositiveNegativeA+A-B+B-C+ BLDC BLDC Motor On-Line OJTM anual61/73 Switching Inverter Motor 3.

4 Switching ~ . Stator Rotor BLDC Motor . 3. BLDC BLDC Motor On-Line OJTM anual62/73 EMFaIaEMFbIbEMFcIc 4. EMF BLDC Motor Magnetic Torque . (7) Motor Magnetic Torque EMF Torque .EMF Motor EMF . EMF Rotor Stator Flux linkage , Stator Sensor EMF . EMF 4 .T = (Ia EMFa+ Ib EMFb+ Ic EMFc)/ (7) BLDC Motor What is advanced angle?On-Line OJTM anual63/73 Switching 6 , 3 Sensor . 3 Sensor Logic . LOGICS ensorHaSensorHbSensorHcSwitchingstateSwi tchA+SwitchA-SwitchB+SwitchB-SwitchC+Swi tchC-HHL OnOffOffOnOffOffHLH OnOffOffOffOffOnHLL OffOffOnOffOffOnLHH OffOnOnOffOffOffLHL OffOnOffOffOnOffLLH OffOffOffOnOnOffBLDC Motor On-Line OJTM anual64/73 5 L1 Motor Vdc Motor X1.

5 L2 Motor X2 . L2 X1 Motor Vdc V3 Motor X1 . Motor Motor .Motor Speed Torque Motor Speed Torque . Motor . Motor Motor . SPEEDTORQUEV1V2V3 VdcX1X2L1L2 5 BLDC Motor On-Line OJTM anual65/73 Inverter . Inverter , Motor Low-Pass Filter Motor .Inverter 6 Motor Mode FreeWheeling Mode .BLDCMOTOR BLDCMOTORU V W U V W (a) Mode (ton)(b) Free Wheeling Mode (toff) 6 Inverter A B C A B C Inverter (1)BLDC Motor On-Line OJTM anual66/73 mode Vdc= Rabx Iab+ Lab (dIab/ dt) + EMFab Inductance .Free wheeling Mode 0 = Rabx Iab+ Lab (dIab/ dt) + EMFab Inductance.

6 Motor Vab (8) .Vab= Vdc ton / (ton + toff) --- (8) ton+toff ton .ton+toff PWM , PWM , ton . Inverter (2) tontoffVdc0 Pulse Width Modulation (PWM)-Motor On,Off Pulse Amplitude Modulation (PAM)-Motor BLDC Motor On-Line OJTM anual67/73 BLDC (SPM)M M6 wiresMagnetM3 wiresMagnetBLDC (IPM, Hybrid)Synchronous ReluctanceSwitched Relutance ( ) ( ) - Rotor ( ) Force ( ) Short through fault IC Module Short through fault Topology IC Module (INVERTER MOTOR) On-Line OJTM anual68/73 Motor : Synchronous Reluctance Motor SIM : System in Module PEBB : Power Electronic Building Block Low Cost Compact Key FeaturesMotor Control Topology 80 90 00 DiscretePower ModuleIPMSIM 2 3 R1L1L2 LmR2/S3 + BLDC(SPM)BLDC(IPM) 85% / Cost ( 100% )89 / 13091 / 12088 / 110 PEBBSIZE (Discrete 100% )80503030 05 (System Matching) V/F Hybrid (PWM + PAM)Sine INVERTER On-Line OJTM anual69/73 600 Thessaly Magnesia 'Magnes'.

7 1600 William Gilbert . , .1820 Oersted , .1901 HanslerALNICO Magnet .(Cu, Mn, Al )1917 Honda Co , Cr , W 4 .1931 Kato, Takai Co .1932 MishimaAl-Ni- (Alni) , MK 1939 JonasAlni Co ALNICO 1952 Philips Ceramic Ferrite Magnet .1968 Raytheon Rare-Earth , Sm-Co 1980 GM , Nd-Fe-B ( ) : (Magnesia) : ( ) ( ) On-Line OJTM anual70/73 ALNICO MagnetFerrite MagnetRare-Earth Magnet / Cast ALNICO SinterdALNICOFe-Cr-CoBa Sr Wet / DrySm-Co Nd-Fe-B Br (G)bHc(Oe)BHmax(MG Oe)7500 ~ 110001350 ~ ~ ~ 44001800 ~ ~ ~ 115005700 ~ 1050025 ~ 30 .. ALNICO Magnet . ALNICO ( 10 ).. Hc, Energy .. Curie Point Cost850 ~ 890 %/ ~ gr/ 150 %450 ~ 460 %/ ~ gr/ 100 %710 ~ 820 %/ ~ gr/ 200 % On-Line OJTM anual71/73 B : (Flux density)H : (Coercieveforce) 7 Hard magnet material HysterisisLoop.

8 A . a H B B= oH . H H B , B-H Curve o , . 7 Hysterisisloop Explain about OJTM anual72/73 8 Hysterisisloop 2 , .< > Magnetiztion: Magnetizer : Magnetizing Yoke : Demagnetiztion: Demagnetizer : Demagnetizing Yoke : Gauss meter :On-Line OJTM anual73/73 1. BLDC / . : MOTOR ( ) .. : ..2. BLDC ?(MAGNETIC TORQUE, RELUCTANCE TORQUE)3. ROTOR STATOR COIL LINK ?( OR )4. BLDC .5. 3 ? ALICO MAGNET FERRITE MAGNET RARE-EARTH MAGNET PLASTIC MAGNET 6. ?( OR HYSTERISYS LOOP)KeKtRabTeVab/)/( -=w