NG C DC KHNG CHI THAN(BLDC)

THC HIN : BI HU SN TRN VN DNG DIP THANH NAM GVGD : TRN CNG BINH

NI DUNG1 S lc v ng c khng chi than2 Nguyn tc hot ng BLDC motor3 iu khin, v khi ng ng c khng chi than.4 ng dng ca ng c khng chi than5 M rng

1) S LC V BLDC MOTORBLDC motor l ng c c rotor l mt nam chm vnh cu. Stator l cun dy kch t. C loi 2 pha, 3 pha.

BLDC motor 2 phaBLDC motor 3 pha

BLDC MOTORH5.BLDC Motor Brushless DC Motor applied for electrical bicycle or tricycle or small vehicles. 350w-650w 36v-60v 1200-1650rpm 3-4, 5N. M, Aluminum case Nd-Fe-B magnetic 130mm diameter

CU TO BN TRONG CA BLDC MOTORStatorRotor

Stator ca BLDC motor gm 2 phn chnh:Cun dy c qun trn cc li st k thut in.Mch in t iu khin cp ngun cho cc cun dy.

BLDC motor c 2 cun dy, rotor l v ng cStatorMch cp ngunrotor

BLDC rotor nm trongStatorrotor Th t phase cp vo 3 cun dy

2)NGUYN TC HOT NGBLDC motor hot ng da trn nguyn tc t trng ca stator vt trc t trng ca rotor, theo xu hng cn bng rotor quay theo t trng thng hng

Ti mi thi im ch c cun dy hin hnh mang in cn cc cun dy khc khng c in (th ng).Vic phn b in p phi ng chiu t trng ca rotor (xc nh chnh xc v tr ca rotor). Nu khng bo m vic th rotor s quay chm.

3)NGUYN TC HOT NG

3)NGUYN TC HOT NG

3)NGUYN TC HOT NGQu trnh o chiu dng in trn cc pha to ra t trng quay ko t trng ca roto quay theo.Gc gia vector t trng stator v rotor lun phi m bo

3)NGUYN TC HOT NGMi trng thi ca rotor c cc Hall a v bng tn hiu s.

3)NGUYN TC HOT NG

TNH TON CUN DY: ( 3 pha)Th t in p a vo cc pha :

th in p cm ng trn mi pha

HIU SUT V TN HAOTn hao trong BLDC motor:- Tn hao ng trn dy qun stator- Tn hao st t trn stator- Tn hao trn mch in t iu khin- Tn hao c.

Gin phn b cng sutPinPoutPdtPcuPfePcoPsr : cng sut chuyn qua rotor

QU TRNH O CHIU1) V sao cn quan tm n qu trnh o chiu dng in trn cc pha ? Vic o chiu dng in ca BLDC khng n gin nh trn ng c DC chi than. i vi BLDC cn phi xc nh chnh xc v tr ca roto cng nh chiu cc tnh ca roto a in p vo cc pha ca ng ng vi yu cu, v khng b ngc chiu

2) Cc phng php o chiu dng in