Direct Modulation Pattern Control for Dual Three-phase PMSM Drive System

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

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Original languageEnglish
Pages (from-to)110-120
Journal / PublicationIEEE Transactions on Industrial Electronics
Issue number1
Online published28 Jan 2021
Publication statusPublished - Jan 2022


The additional harmonic currents in multiphase permanent magnet synchronous motors (PMSM) have been widely discussed and suppressed by the virtual vectors (VVs). However, the concept of VVs would result in an increasing in the switching frequency and losing the controllability in the harmonic subspace. In this paper, a novel direct modulation pattern control (DMPC) method is proposed to provide the further discussion on the lower switching frequency and the better harmonic current suppression. Firstly, a deadbeat control concept is applied to calculate the reference voltage vectors in torque production. The designs of these switching patterns are determined according to the demand. In fact, two design concepts under the structure of DMPC is proposed. One is called the low switching frequency design. Another is called the low THD design. The control sets of this design is two switching patterns with opposite harmonic voltage vectors. Secondly, the influence of these different switching patterns in the xy currents is optimized by a cost function. Finally, the experimental results show a good performance of these control strategies, in terms of the αβ currents production, the xy currents and the switching frequency reduction.

Research Area(s)

  • Control systems, Cost function, Deadbeat Control, Direct Modulation Pattern Control (DMPC), Dual Three-phase, Harmonic analysis, Multiphase Machine, Permanent Magnet Synchronous Motor (PMSM), Predictive Control, Switches, Switching Frequency, Torque, Voltage control, Voltage Vector