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Type: Conference paper
Title: An observer-based three-phase current reconstruction using DC link measurement in PMAC motors
Author: Li, Y.
Ertugrul, N.
Citation: Proceedings of IPEMC 2006: International Power Electronics and Motion Control Conference, August 2006, Shangai, China / vol. 1, pp. 1-5
Publisher: IEEE
Publisher Place: USA
Issue Date: 2006
ISBN: 1424404487
Conference Name: International Power Electronics and Motion Control Conference (6th : 2006 : Shangai, China)
Statement of
Li Ying ; Ertugrul, N
Abstract: This paper proposes a novel three-phase current reconstruction technique that utilises the measured DC link current and the switching signals of a three-phase inverter used in permanent magnet (PM) AC motors. The method is based on an adaptive current observer, which includes the model of a motor drive to estimate the three-phase currents. The relationship between the three-phase currents and the DC link current is used to estimate the DC link current first as an output of the observer. Then, this output is compared with the measured DC link current and the current error. The error is used to compensate the DC link voltage that can force the estimated phase currents to follow the actual winding currents. The paper provides a detailed analysis of the current conduction modes in a three-phase inverter and summarises the implementation details the method in realtime. A wide range of experimental results provided in this study demonstrates that the method can accurately reconstruct the phase currents both in the sinusoidal and in the rectangular current excitation modes of a PMAC motor.
Description: © Copyright 2006 IEEE
RMID: 0020062751
DOI: 10.1109/IPEMC.2006.4777965
Appears in Collections:Electrical and Electronic Engineering publications

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