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Multiparameter Estimation of PMSM Combining Mechanical and Electrical Models with Nonlinear Saturated Inductance and Voltage Fitting
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CES Transactions on Electrical Machines and Systems | 2026, 10(1) : 109 - 120
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CES Transactions on Electrical Machines and Systems | 2026, 10(1): 109-120
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Multiparameter Estimation of PMSM Combining Mechanical and Electrical Models with Nonlinear Saturated Inductance and Voltage Fitting
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Xinmin Li1,2, Kun Liu2, Lu Zhou3, Tingna Shi4, Wei Chen1,2
Affiliations
    1 the Zhejiang University Advanced Electrical Equipment Innovation Center, Hangzhou 311107, China;
    2 the School of Electrical Engineering, Tiangong University, Tianjin 300387, China;
    3 the School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;
    4 the College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
About Author:
Xinmin Li: Xinmin Li (Member, IEEE) was born in Hunan, China, in 1989. He received the B.S. degree in automation from University of Science and Technology Beijing, Beijing, China, in 2011, and the Ph.D. degree in electrical engineering from Tianjin University, Tianjin, China, in 2017. He is currently a professor with the Zhejiang University Advanced Electrical Equipment Innovation Center, and also with the School of Electrical Engineering, Tiangong University, Tianjin, China. His research interests include electrical machines and motor drives, electric drive systems of electric vehicles, power electronics, and wind power technology.
Kun Liu: Kun Liu was born in Sichuan, China, in 2001. He received the B.S. degree in electrical engineering and automation from Tiangong University, Tianjin, China, in 2023. He is currently working toward the M.S. degree in electrical engineering from Tiangong University, Tianjin, China. His research interests include electrical machines, motor drives, and power electronics.
Lu Zhou: Lu Zhou was born in Anhui, China, in 1992. He received the B.S. degree in electrical engineering and automation from Tongling University, Tongling, China, in 2015, and the M.S. degree in instrument science and technology from Taiyuan University of Technology, Taiyuan, China, in 2018, and the Ph.D. degree in electrical engineering from Tianjin University, Tianjin, China, in 2024. He is currently an engineer working at No. 43 Research Institute of China Electronics Technology Group Corporation, Hefei, China. His research interests include motor drives and power electronics.
Tingna Shi: Tingna Shi (Senior Member, IEEE) was born in Yuyao, China, in 1969. She received the B.S. and M.S. degrees from Zhejiang University, Hangzhou, China, in 1991 and 1996, respectively, and the Ph.D. degree from Tianjin University, Tianjin, China, in 2009, all in electrical engineering. She is currently a professor with the College of Electrical Engineering, Zhejiang University. Her current research interests include electrical machines and their control systems, power electronics, and electric drives.
Wei Chen: Wei Chen (Member, IEEE) was born in Shanxi, China, in 1977. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from Tianjin University, Tianjin, China, in 2000, 2003, and 2006, respectively. He is currently a professor with the School of Electrical Engineering, Tiangong University, Tianjin, China, and the Vice President with the National Local Joint Engineering Research Center of Electric Machine System Design and Manufacturing, Tianjin, China. His research interests include electrical machines and drivers, and power electronics.
doi: 10.30941/CESTEMS.2026.00007
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In position-sensorless brushless direct current (DC) motors (BLDCMs) fed by a four-switch three-phase (FSTP) inverter, only two phases are fully controlled, while the remaining phase is tied to the midpoint of the split DC-link capacitors. The voltage pulses required by inductance-based initial position detection can cause unequal discharge of the series capacitors, shifting the neutral-point voltage away from half of DC-link voltage (Udc/2). This neutral-point drift breaks the spatial symmetry of the inverter voltage vectors, so the 360° electrical period can no longer be evenly partitioned into six sectors during initial rotor position detection. To address this issue, this paper proposes a detection-pulse injection sequence that explicitly accounts for the asymmetric voltage vectors of the FSTP inverter. With the proposed sequence, the initial rotor position can be identified within a 30° electrical sector. The method requires no additional voltage or current sensors, and experimental results confirm its feasibility.
Brushless direct current (DC) motor (BLDCM)  /  Four-switch three-phase (FSTP) inverter  /  Asymmetric voltage vector  /  Initial position detection
Xinmin Li, Kun Liu, Lu Zhou, Tingna Shi, Wei Chen. Multiparameter Estimation of PMSM Combining Mechanical and Electrical Models with Nonlinear Saturated Inductance and Voltage Fitting[J]. CES Transactions on Electrical Machines and Systems, 2026 , 10 (1) : 109 -120 . DOI: 10.30941/CESTEMS.2026.00007
Year 2026 volume 10 Issue 1
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doi: 10.30941/CESTEMS.2026.00007
  • Online Date:2026-06-12
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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