Wenxiang Zhao Yi Wang 0165 Jinghua Ji Tianyu Zhang Tong Liu 0020 Reduced Order Model Coupling Frequency Domain Method for Calculation of Core Loss in SPM Machine Considering PWM Current Harmonics. 220-229 2025 January 72 IEEE Trans. Ind. Electron. 1 https://doi.org/10.1109/TIE.2024.3413836 db/journals/tie/tie72.html#ZhaoWJZL25 streams/journals/tie