Open AccessThree effective vectors‐based current control scheme for four‐switch three‐phase trapezoidal brushless DC motor
Author(s) -
Xia Changliang,
Xiao Youwen,
Chen Wei,
Shi Tingna
Publication year - 2013
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2013.0030
Subject(s) - control theory (sociology) , ripple , duty cycle , dc motor , robustness (evolution) , three phase , inverter , computer science , waveform , voltage , engineering , control (management) , electrical engineering , biochemistry , chemistry , artificial intelligence , gene
This study presents a novel three effective vectors (TEV) current control scheme for four‐switch three‐phase inverter in cost‐effective brushless DC motor drive with improved performance. This scheme overcomes the possible distortion of three‐phase currents caused by phase C back‐EMF, and quasi‐square current waveforms are attained by inserting two adjusting vectors in each control period based on the conventional switching modulation scheme. The duty cycles of the two adjusting vectors are further calculated using a simple P controller. Integral variable structure control principle with advantages of high bandwidth and strong robustness against external disturbance is used to control the tracing of reference current by actual currents. The stability of the proposed TEV current control scheme is demonstrated by selecting a candidate Lyapunov function, based on which the range of duty cycles of adjusting vectors are also determined. Experimental results verify that the proposed scheme is simple and can provide small current ripple, with good performance in speed.