A CSI-Fed PMSM Drive System With Single-Stage Operation for Extended Constant-Torque Range

Yang Xu, Zheng Wang, Yinzhen Shen, Jiangbiao He, Giampaolo Buticchi

    Research output: Journal PublicationArticlepeer-review


    Aiming at extending the constant-torque region, a high-performance single-stage control strategy is proposed for the current-source inverter (CSI) fed permanent-magnet synchronous motor (PMSM) drive system in this article. Different from traditional CSI-fed motor drives, both the dc-link current and the motor speed are regulated by the CSI for single-stage operation. A novel cascaded closed-loop control structure is proposed, where the speed controller and the dc-link current controller are designed as the outer and inner loops, respectively. The input dc voltage can be boosted for higher terminal voltages of PMSM, and the constant-torque operation range is extended and the efficiency is improved for the CSI-fed drive due to the avoidance of flux-weakening operation. Moreover, the cascaded closed-loop current controller is developed, which can suppress the <italic>LC</italic> resonance excited by low-order current harmonics in the single-stage operation. To achieve the smooth transition between the two-stage operation in the low-speed region and the single-stage operation in the high-speed region, a hysteresis comparator-based switching strategy is proposed. Experiments have been conducted to verify the effectiveness of the boost feature of CSI and the proposed control scheme.

    Original languageEnglish
    Pages (from-to)1-13
    Number of pages13
    JournalIEEE Transactions on Industrial Electronics
    Publication statusAccepted/In press - 2023


    • Boost operation
    • Capacitors
    • controller design
    • current-source inverter (CSI)
    • Hysteresis motors
    • Inductors
    • Inverters
    • Modulation
    • Motor drives
    • permanent-magnet synchronous motor (PMSM) drive
    • single-stage operation
    • Voltage control

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Electrical and Electronic Engineering


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