Paper Info
Title
Flux-Weakening Control For Induction Motor In Voltage Extension Region: Torque Analysis And Dynamic Performance Improvement
Abstract
Flux-weakening control for induction motor (IM) in voltage extension region (outside the inscribed circle but in the hexagon) is meaningful to yield a furthermaximum torque. However, as the voltage-limit trajectorymigrates out of the inscribed circle, torque ripple becomes more severe. Meanwhile, the insufficient voltage margin results in the degradation of current dynamic performance in transition period (from base speed region to flux-weakening region), especially in harsh conditions, e.g., a step speed command. To address the problems above, this paper gives a quantitative analysis of the torque ripple and an explicit discussion on the current dynamic performance. A novel "Voltage Reference Adjustable" flux-weakening controller with "Self-Locking Limit Block" (SLLB) is proposed. There are two advantages. The first is the capability to operate in any voltage extension regions, offering a tradeoff between obtaining the maximum torque and suppressing the torque ripple. The second is an optimized voltage distribution, achieving a better track characteristic of d-and q-axis currents with the help of triggered SLLB in transition period. Experimental results on a commercial IM control system verify the validity of the proposed scheme.
Year
DOI
Venue
2018
10.1109/TIE.2017.2764853
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Keywords
Field
DocType
Dynamic performance improvement, flux-weakening control, induction motor (IM), maximum torque, voltage extension
Stall torque,Induction motor,Control theory,Torque sensor,Control theory,Direct torque control,Voltage reference,Voltage,Control engineering,Engineering,Torque ripple
Journal
Volume
Issue
ISSN
65
5
0278-0046
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Zhen Dong18126.47
Yong Yu200.68
Wenshuang Li300.34
Bo Wang403.04
DianGuo Xu52230.76