VP2-11 Calculation of Core and PM Losses Considering Current Harmonics and Saturation Effects Based on Exact Analytical Model
Creators: Duy-Tinh Hoang
Manh-Dung Nguyen
Kyung-Hun Shin
Yong-Joo Kim
Anh-Tuan Phung and Jang-Young Choi
Publisher: name: IEEE
Year: 2025

Due to their high performance, permanent magnet synchronous machines (PMSMs) are crucial for various applications such as traction applications and aerospace. Accurate calculation of core and Permanent Magnet (PM) losses is vital for optimizing machine design and improving efficiency. Although these losses are often predicted accurately by finite element analysis (FEA), analytical models (AM) are preferred for initial design stages due to their greater insights and reduced computation time. However, the models without coupling FEA typically overlook saturation effects, assuming the core has infinite or constant permeability [1]-[3]. To deal with this problem, this paper anatically predicts the core and PM losses in Surface Permanent Magnet (SPM) machines using harmonic modeling, as developed in [4] combined with an iterative process to find nonlinear solutions. The solution is utilized to extract the magnetic quantities necessary for loss calculations. Additionally, the effects of current harmonics on core loss are further introduced, providing a more realistic assessment of machine performance under varying operational conditions. The accuracy of the proposed method is validated through FEA and experimental tests, demonstrating high precision and reliability making it a valuable tool for the initial design stage.References: [1] D. Ishak, Z. Q. Zhu, and D. Howe, IEEE Trans Magn, vol. 41, no. 9 (2005). [2] L. J. Wu, Z. Q. Zhu, and D. Hawkins, IEEE Trans Magn, vol. 48, no. 1 (2012). [3] Z. Djelloul-Khedda, K. Boughrara, and A. Tikellaline, IEEE Trans Magn, vol. 55, no. 1 (2019). [4] Z. Djelloul-Khedda, K. Boughrara, and B. Souleyman, IEEE Trans Magn, vol. 54, no. 7 (2018).
Due to their high performance, permanent magnet synchronous machines (PMSMs) are crucial for various applications such as traction applications and aerospace. Accurate calculation of core and Permanent Magnet (PM) losses is vital for optimizing machine design and improving efficiency. Although these losses are often predicted accurately by finite element analysis (FEA), analytical models (AM) are preferred for initial design stages due to their greater insights and reduced computation time. However, the models without coupling FEA typically overlook saturation effects, assuming the core has infinite or constant permeability [1]-[3]. To deal with this problem, this paper anatically predicts the core and PM losses in Surface Permanent Magnet (SPM) machines using harmonic modeling, as developed in [4] combined with an iterative process to find nonlinear solutions. The solution is utilized to extract the magnetic quantities necessary for loss calculations. Additionally, the effects of current harmonics on core loss are further introduced, providing a more realistic assessment of machine performance under varying operational conditions. The accuracy of the proposed method is validated through FEA and experimental tests, demonstrating high precision and reliability making it a valuable tool for the initial design stage.References: [1] D. Ishak, Z. Q. Zhu, and D. Howe, IEEE Trans Magn, vol. 41, no. 9 (2005). [2] L. J. Wu, Z. Q. Zhu, and D. Hawkins, IEEE Trans Magn, vol. 48, no. 1 (2012). [3] Z. Djelloul-Khedda, K. Boughrara, and A. Tikellaline, IEEE Trans Magn, vol. 55, no. 1 (2019). [4] Z. Djelloul-Khedda, K. Boughrara, and B. Souleyman, IEEE Trans Magn, vol. 54, no. 7 (2018).