An Innovative Approach to the Design of Line-Start Permanent Magnet Synchronous Motors

Authors

  • Thanh Nguyen Vu Laboratory of High-Performance Electric Machines (HiPEMs), Department of Electrical Engineering, School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Vietnam
  • Dong Ngo Huy Laboratory of High-Performance Electric Machines (HiPEMs), Department of Electrical Engineering, School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Vietnam
  • Hoang Ha Quang Laboratory of High-Performance Electric Machines (HiPEMs), Department of Electrical Engineering, School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Vietnam
  • Vuong Dang Quoc Laboratory of High-Performance Electric Machines (HiPEMs), Department of Electrical Engineering, School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Vietnam
  • Chen Hao School Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Volume: 15 | Issue: 5 | Pages: 26181-26188 | October 2025 | https://doi.org/10.48084/etasr.11997

Received: 8 May 2025 | Revised: 24 June 2025 | Accepted: 3 July 2025 | Online: 6 October 2025


Corresponding author: Thanh Nguyen Vu

Abstract

This paper describes an innovative analytical design approach for a Line-Start Permanent Magnet Synchronous Motor (LSPMSM) that can be used to swiftly verify the design parameters. The goal of the method is to create an analytical equation system based on the d-q coordinate system that considers both under-excitation and over-excitation scenarios. In this system, the essential design parameters of the LSPMSM motor are calculated and determined directly using the proposed equation system, namely the rated armature current (I1), torque angle (δ), and phase difference (γ) between the induced electromotive force (Epm) and the armature current. Three practical motors with rated outputs of 22 kW, 11 kW, and 3 kW were developed to investigate the accuracy of the proposed system. The results of the analytical method were compared with those of Finite Element Analysis (FEA), which revealed a high degree of suitability, with a relative error of less than ±5%. Furthermore, the proposed equation system's reliability was evaluated using two design parameters: the power factor and the effective value of the armature current, which were computed from the FEA-simulated current waveforms. The proposed equation system is a useful tool for the design verification and rapid optimization of LSPMSM motors because it significantly decreases the verification simulation time compared with FEA-based designs.

Keywords:

torque angle, rated armature current, LSPMSM motor model, ultra premium efficiency, LSPMSM design

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How to Cite

[1]
T. N. Vu, D. N. Huy, H. H. Quang, V. D. Quoc, and C. Hao, “An Innovative Approach to the Design of Line-Start Permanent Magnet Synchronous Motors”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 5, pp. 26181–26188, Oct. 2025.

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Copyright (c) 2025 Thanh Nguyen Vu, Dong Ngo Huy, Hoang Ha Quang, Vuong Dang Quoc, Chen Hao

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