An accurate wide-speed range control method of IPMSM considering resistive voltage drop and magnetic saturation

Wang, Shuo; Kang, Jinsong; Degano, Michele; Galassini, Alessandro; Gerada, Chris

Abstract

This paper deals with the high accurate current set-points solution for Interior Permanent-Magnet Synchronous Motors (IPMSM) in wide-speed range applications. Considering voltage and current constraints, the operating regions can be divided into Maximum Torque Per Ampere (MTPA), Maximum Current (MC), Field Weakening (FW) and Maximum Torque Per Voltage (MTPV) regions, which requires to solve different non-linear functions in real time to obtain optimal current set-points. Traditional methods including curve-fitting methods and polynomial approximation (PA) methods are not easy to obtain these solutions, especially involving magnetic saturation problems. In this paper, Newton-Raphson (N-R) algorithm for improving the control accuracy of the current set-points is proposed. Meanwhile, parameters influence including magnetic saturation and resistive voltage drop is fully investigated. Compared with PA method, the proposed method is able to converge to accurate solutions in few numbers of iterations with reduced execution time, which can be easily implemented on an off-the-shelf Digital Signal Processor (DSP). Both simulation results and experimental results on an 8kW IPMSM rig are conducted showing good agreement with the expected results. Index Terms-Cross Saturation, flux-weakening control, interior permanent-magnet synchronous motors (IPMSM), magnetic Saturation, Newton-Raphson (N-R) method, resistive voltage drop.

Citation

Wang, S., Kang, J., Degano, M., Galassini, A., & Gerada, C. (2020). An accurate wide-speed range control method of IPMSM considering resistive voltage drop and magnetic saturation. IEEE Transactions on Industrial Electronics, 67(4), 2630-2641. https://doi.org/10.1109/TIE.2019.2912766

• Journal Article Type: Article
• Acceptance Date: Mar 26, 2019
• Online Publication Date: Apr 29, 2019
• Publication Date: Apr 1, 2020
• Deposit Date: Apr 17, 2019
• Publicly Available Date: Apr 18, 2019
• Journal: IEEE Transactions on Industrial Electronics
• Print ISSN: 0278-0046
• Electronic ISSN: 1557-9948
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 67
• Issue: 4
• Pages: 2630-2641
• DOI: https://doi.org/10.1109/TIE.2019.2912766
• Keywords: Cross Saturation, Flux-weakening control, Interior permanent-magnet synchronous motors (IPMSM), Magnetic Saturation, Newton-Raphson (N-R) method, Resistive voltage drop
• Public URL: https://nottingham-repository.worktribe.com/output/1823039
• Publisher URL: https://ieeexplore.ieee.org/document/8701615
• Additional Information: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
• Contract Date: Apr 18, 2019