Novel rotor position detection method of line back EMF for BLDCM

Μέγεθος: px

Εμφάνιση ξεκινά από τη σελίδα:

Download "Novel rotor position detection method of line back EMF for BLDCM"

Πάτροκλος Μπουκουβαλαίοι
5 χρόνια πριν
Προβολές:

1 ELECTRI C MACHINES AND CONTROL Vol. 14 No. 12 Dc TM 351 A X Novl rotor position dtction mthod of lin back EMF for BLDCM LI Zi-chng 1 CHENG Shan-mi 2 QIN Yi 2 1. School of Elctrical and Information Enginring Wuhan Institut of Tchnology Wuhan China 2. Dpartmnt of Control Scinc and Enginring Huazhong Univrsity of Scinc and Tchnology Wuhan China Abstract According to th snsing thory of traditional back lctromotiv forc EMF a novl rotor position dtction schm was proposd for brushlss DC motors BLDCM snsorlss control basd on th zro-crossing of simplifid lin back EMF. Th points of zro-crossing of thr lin back EMFs ar obtaind from th calculation in ral tim by masuring two lin voltags and two phas currnts of BLD- CM and utilizing th stator rsistanc. Basd on this schm it is asy to raliz snsorlss control for BLDCM drivs. Th proposd mthod is simpl to implmnt and convnint to calculat without rconstructing th motor nutral and phas dlay compnsation is also not ndd. Manwhil th variation of th stator rsistanc has littl influnc on th stimation rror of rotor position. Simulation and xprimntal rsults show that th proposd schm can stimat th rotor position accuratly in wid spd rang. Ky words back lctromotiv forc position masurmnt brushlss DC motors lctric commutation snsorlss control

2 Fig. 2 Idal back EMF and currnt wavforms G 10 G 8 u a R 0 0 u b = 0 R 0 i 8 b + d L L 0 i dt b + uc 0 0 R ic 0 0 L ic a u n b + u n 1 c un u a u b u c i a i b i c a b c 1 u n a = u a - Ri a - Ldi a /dt - u n 6 b = u b - Ri b - Ldi b /dt - u n 2 c = u c - Ri c - Ldi c /dt - u n 6 1 Y 30 n ab = a - b = u ab - R i a - i b - L d i a - i b /dt bc = b - c = u bc - R i b - i c - L d i b - i c /dt ca = c - a = u ca - R i c - i a - L d i c - i a /dt 1 Fig. 1 Main circuits of BLDCM i a R L i a 3 2

3 98 14 bc c b c b E bc = u bc + Ri c 7 11 a = E sinωt + k 3 sin3ωt + k 5 sin5ωt + b = E sin ωt - 2π /3 + k 3 sin3 ωt - 2π /3 + k 5 sin5 ωt - 2π /3 + ca = u ca - Ri c c = E sin ωt + 2π /3 + k 3 sin3 ωt + 2π /3 + bc = u bc - Ri b 8 k 5 sin5 ωt + 2π /3 + ab = u ab - Ri a 4 8 ca = u ca + Ri a ca = 槡 3Ecos ωt + π /3 bc = u bc + Ri c 9 ab = u ab + Ri b bc = 槡 3Ecos ωt - π 5 6 ab = 槡 3Ecos ωt - π /3 360 ωt Matlab /SIMULIMK R = 2. 8 Ω 3 L = 6. 9 mh 4 ON - PWM r /min R L bc s b s h 3 a b c bc 90 bc = b - c = ( ) u bc - R i b - i c - L di b dt - di c dt bc 2 R L b c b c b c i b i c L c bc r /min ON - PWM HP- Fig. 3 Simulation wavforms at 500 r / min WM - LPWM bc = u bc - Ri b r /min 0. 5s 50 r /min4 bc s b

4 12 99 s h n 180 W 220 V r /min A 4 u ab u bc 3 u ca i a i b i c r /min 100 r /min bc s h s b 4 Fig r /min 50 r /min Simulation wavforms from 200 r /min to 50 r /min r /min r /min Fig. 5 Impact of th rsistanc variation at 500 r /min 3 dspic30f PWM

5 ON - PWM 6 SHAO Jianwn NOLAN D HOPKINS T. A novl microcontrollrbasd snsorlss brushlss DC BLDC motor driv for automotiv fu- 80 ~ r /min l pumps J 1. lctronics J LIU Changzhng YE Guiyun CHEN Dyun t al. Dsign and ralization of variabl frquny tuning vlocity systm of snsorlss BLDCM J. Elctric Machins and Control JANG G H KIM M G. Optimal commutation of a BLDC motor by utilizing th symmtric trminal voltag J. IEEE Transactions on Magntics J CAO Jianbo CAO Binggang XU Png t al. Rsarch on torqu rippl minimization of position snsorlss brushlss DC motor J. Elctric Machins and Control LI Zichng CHENG Shanmi QIN Yi t al. A novl lin-to- 4. lin back EMF calculation for snsorlss brushlss DC motor J drivs C / /Procdings of th 11 th Intrnational Confrnc on ZHANG Li QU Wnlong LU Haifng t al. A novl snsorlss Elctrical Machins and Systms Oct 2008 Wuhan control systm of brushlss DC motors J. Transactions of China China Elctrochnical Socity SU G J MCKEEVER J W. Low-cost snsorlss control of brushlss dc motors with improvd spd rang J. IEEE Transactions on Powr Elctronics IEEE Transactions on Industry Applications KIM T H EHSANI M. Snsorlss control of th BLDC motors from nar-zro to high spds J. IEEE Transactions on Powr E- 8. J LI Zichng CHENG Shanmi CAI Kai. Estimation of rotor position of BLDC motor basd on lin-to-lin back-emf J. Elctric Driv ZHOU Gnfu WU Zhigan YING Jianping. Unattnuatd BEMF dtction for snsorlss brushlss DC motor drivs C / /Procdings of th 4 th Intrnational Powr Elctronic and Motion Control Confrnc Aug 2004 Shanghai China CHEN C H CHENG M Y. A nw cost ffctiv snsorlss commutation mthod for brushlss DC motors without phas shift circuit and nutral voltag J. IEEE Transactions on Powr Elctronics

Σχετικά έγγραφα

Homework #6. A circular cylinder of radius R rotates about the long axis with angular velocity

Homework #6. A circular cylinder of radius R rotates about the long axis with angular velocity Homwork #6 1. (Kittl 5.1) Cntrifug. A circular cylindr of radius R rotats about th long axis with angular vlocity ω. Th cylindr contains an idal gas of atoms of mass m at tmpratur. Find an xprssion for