Precise Accelerated Torque Control for Small Inductance Brushless DC Motor

In this paper, precise accelerated torque control for a small inductance brushless dc motor (BLDCM) is achieved by electromagnetic torque control and disturbance torque suppression. First, the electromagnetic torque ripple is reduced in commutation and conduction regions. In the former region, the r...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2013-03, Vol.28 (3), p.1400-1412
Main Authors: Fang, Jiancheng, Zhou, Xinxiu, Liu, Gang
Format: Article
Language:English
Subjects:
Accelerated torque
Acceleration
Applied sciences
Asymmetry
brushless dc motor (BLDCM)
Circuit properties
Commutation
Control systems
Controllers
disturbance suppression
Electric currents
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical machines
Electromagnetic compatibility
electromagnetic torque
Electromagnetics
Electronic circuits
Electronics
Exact sciences and technology
Inductance
Information, signal and communications theory
Miscellaneous
Parameter estimation
Regulation and control
Signal convertors
small inductance
Switches
Telecommunications and information theory
Torque
Torque control
torque ripple
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Summary:In this paper, precise accelerated torque control for a small inductance brushless dc motor (BLDCM) is achieved by electromagnetic torque control and disturbance torque suppression. First, the electromagnetic torque ripple is reduced in commutation and conduction regions. In the former region, the ripple is suppressed by overlapping commutation control and optimizing the duty ratio of the active controller. In the latter region, the unbalance ripple caused by the unbalanced three phase windings is reduced by the proposed asymmetry compensation function, and the disturbance ripple created by the back electromotive force (EMF) is compensated by feedforward control. Second, the disturbance torque has been observed and compensated through the improved disturbance torque controller whose compensation coefficient is obtained by line-to-line back EMF coefficient estimation. And, both the disturbance observation and speed measurement are all synchronized with the encoder pulse alteration. Experimental results are presented to demonstrate the validity and effectiveness of the proposed accelerated torque control scheme.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2012.2210251