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Hybrid FW control and overmodulation algorithm

Published: 28 June 2024 Publication History

Abstract

When the permanent magnet synchronous motor operates weakly at high speed, the back EMF generated by the permanent magnets also rises, resulting in limited motor speed increase and the risk of runaway, while weak magnetic current fluctuations occur in the case of deep overmodulation, and voltage jumps between output voltage vectors lead to deterioration of current performance and load capacity. This affects the stability of motor operation. Not only expand the motor speed, but also improve the bus voltage utilization while operating stably. In this paper, through runaway analysis, the optimal switching point for switching between different weak magnetic regions is clarified, the optimal current trajectory is obtained, the motor voltage is estimated in the over-modulation region, the adverse effects of voltage and current harmonics on the control system are mitigated, and an over-modulation strategy based on over-angle combined with MTPV hybrid control is proposed to achieve simultaneous control of the d-q axis, broaden the range of weak magnetic speed regulation, effectively eliminate current ripple, and improve the modulation depth.

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    ICRSA '23: Proceedings of the 2023 6th International Conference on Robot Systems and Applications
    September 2023
    335 pages
    ISBN:9798400708039
    DOI:10.1145/3655532
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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    Published: 28 June 2024

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    Author Tags

    1. dual-mode overmodulation
    2. hybrid flux-weakening control
    3. out-of-control analysis

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