Discrete-time Current Regulator for AC Machine Drives

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

5 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)5847-5858
Number of pages12
Journal / PublicationIEEE Transactions on Power Electronics
Volume37
Issue number5
Online published23 Nov 2021
Publication statusPublished - May 2022

Abstract

In a practical alternating current (AC) machine drive system, a direct discrete-time current regulator model based on a zero order hold (ZOH) equivalent discrete-time machine model should be the first choice to be established compared with the discrete-time current regulator model based on continuous-time machine model when designing a digital current regulator. However, it is complicated to establish a direct discrete-time current regulator for asymmetric machine1 model due to the involvement of matrix exponential related to unequal machine inductance parameters. In order to overcome this issue, a simple direct discrete-time current regulator based on flux model is proposed, where a novel AC machine model is developed by employing a new feed-forward voltage compensation. In addition, a direct discrete-time flux observer with low parameter sensitivity is proposed to compensate the inherent one-step delay in practical systems. Simulation results and theoretical analysis have shown that the proposed discrete-time current regulator and flux observer have good parameter robustness and stability. Also, the experimental verification is performed on a AC machine drive test rig.

Research Area(s)

  • AC machines, Alternating current (AC) machine, Current regulator, Delays, Discrete-time model, Mathematical models, Parameter robustness, Regulators, Resistance, Stators, Voltage control

Citation Format(s)

Discrete-time Current Regulator for AC Machine Drives. / Yuan, Xin; Chen, Jiahao; Jiang, Chaoqiang; Lee, Christopher H. T.

In: IEEE Transactions on Power Electronics, Vol. 37, No. 5, 05.2022, p. 5847-5858.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review