DC Current Control for a Single-Stage Current Source Inverter in Motor Drive Application

Giovanni Migliazza, Giampaolo Buticchi, Emilio Carfagna, Emilio Lorenzani, Vincenzo Madonna, Paolo Giangrande, Michael Galea

Research output: Journal PublicationArticlepeer-review

30 Citations (Scopus)


The current source inverter (CSI) is a power electronics topology that allows for the realization of variable speed drives (VSD). Compared to the most common voltage source inverter (VSI), which can be directly connected to a voltage source, the CSI needs a prestage to generate a constant current bus. This article therefore seeks to challenge this 'accepted' consideration that a CSI always needs this precircuit and seeks to remove this circuit by proposing an innovative $i_{dc}$ current control scheme. The proposed scheme is applied to a single stage motor drive driven by a CSI converter. It is shown how implementing this control scheme removes the need for the front-end stage, thus removing an unnecessary converter and optimizing the efficiency at the same time. The CSI state-space equations are presented and the developed models are verified using simulations. Stability analysis of small-signal model is considered through Nyquist criterion with the robustness in presence of variations of the most important system parameters. Experimental results driving a permanent magnet synchronous machine (PMSM) are shown confirming the validity of the proposed control, potentially paving the way to a larger adoption of the CSI topologies for motor drive applications.

Original languageEnglish
Article number9154581
Pages (from-to)3367-3376
Number of pages10
JournalIEEE Transactions on Power Electronics
Issue number3
Publication statusPublished - Mar 2021


  • Current source inverter
  • dc current control
  • electric drive system
  • electric machine control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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