Enhancing Inner-Rotor Radial Flux PMSG Design through Air-Gap Flux Validation and Leakage Inductance Modeling

Authors

  • Hari Prasetijo Department of Electrical Engineering, Universitas Jenderal Soedirman, Purwokerto, Indonesia | Doctoral Program in Ilmu Teknik, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
  • Mohammad Khairudin Department of Electrical Engineering, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
  • Ketut Wirtayasa Research Center for Energy Conversion and Conservation, National Research and Innovation Agency, Bandung, Indonesia
  • Daru Tri Nugroho Department of Electrical Engineering, Universitas Jenderal Soedirman, Purwokerto, Indonesia
  • Yogi Ramadhani Department of Electrical Engineering, Universitas Jenderal Soedirman, Purwokerto, Indonesia
Volume: 15 | Issue: 5 | Pages: 27915-27921 | October 2025 | https://doi.org/10.48084/etasr.12899

Received: 24 June 2025 | Revised: 1 August 2025 | Accepted: 14 August 2025 | Online: 6 October 2025


Corresponding author: Mohammad Khairudin

Abstract

This study presents a comprehensive design and performance validation of a three-phase, 900-watt Inner-Rotor Radial Flux Surface-Mounted Permanent Magnet Synchronous Generator (IR-RF-SPMSG). The proposed generator, featuring 10 poles and 30 slots with a 0.9 pole arc ratio, is designed analytically and simulated using 3D finite element modeling. The key contributions include the validation of the air-gap flux density using leakage and reluctance correction factors, the detailed modeling of the leakage inductance components, and an accurate three-phase winding configuration. The comparison between the analytical and simulation results yields errors below 1% for the air-gap flux density (Bg), back-EMF (Eph), phase current (Iph), terminal voltage (Vph), and three-phase output power (Sout). The methodology significantly improves the terminal voltage prediction under load and ensures waveform integrity, offering a reliable design reference for low-speed renewable energy systems.

Keywords:

radial flux generator, flux validation, leakage inductance, FEM simulation, low-speed design, renewable energy

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How to Cite

[1]
H. Prasetijo, M. Khairudin, K. Wirtayasa, D. T. Nugroho, and Y. Ramadhani, “Enhancing Inner-Rotor Radial Flux PMSG Design through Air-Gap Flux Validation and Leakage Inductance Modeling”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 5, pp. 27915–27921, Oct. 2025.

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