Design of a Grid-Connected Multiphase Servo System Without DC-Link Capacitor

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Original languageEnglish
Article number7500106
Number of pages6
Journal / PublicationIEEE Transactions on Magnetics
Issue number1
Online published20 Dec 2019
Publication statusPublished - Jan 2020


In this article, a direct grid-connected servo system without a dc-link capacitor is proposed for multiphase machines. First, the modeling and field-oriented control are elaborated for the direct grid-connected multiphase servo system. Then, the space current vector modulation and the vector coordination under pulsewidth-modulated (PWM) dc-link voltage are introduced, which is to ensure the safe current commutation. Moreover, the torque and harmonic current control are implemented independently with vector space decomposition. Finally, both simulation and experimental results are given to verify the effectiveness and validity of the proposed servo system.

Research Area(s)

  • Field-oriented control, grid connected, multiphase machine, permanent-magnet motor, servo system