Open AccessAnalysis and comparison of performance of permanent magnet servo motors after stator shifting combination
Author(s) -
Li Hui,
Liang Jianwei,
Zhang Junming
Publication year - 2020
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2020.0035
Subject(s) - stator , magnet , servo , control theory (sociology) , servomotor , computer science , servo drive , automotive engineering , control engineering , mechanical engineering , engineering , artificial intelligence , control (management)
The undesired harmonics in the stator magnetomotive force (MMF) of the permanent magnet servo motor (PMSM) have a lot of adverse effects on the operation performance of the motor. The stator shifting combination is a powerful means to weaken or even eliminate the undesired harmonics in the stator MMF. By using the stator shifting combination, the common 9‐slot–8‐pole, 12‐slot–10‐pole and 15‐slot–10‐pole combination schemes are transformed, and the 18‐slot–8‐pole, 24‐slot–10‐pole and 30‐slot–10‐pole combination schemes are obtained. With the three new schemes, three PMSMs are designed under the same working condition, and their electromagnetic performance, temperature field and NVH are analysed and compared by multi‐physical field finite element analysis. Among the three motors, the harmonic content of back electromotive force, torque ripple and cogging torque amplitude of the 24‐slot–10‐pole motor is the lowest, the loss and flux‐weakening performance are between the other two motors. What's more, it has low radial electromagnetic force harmonic content, and the sound pressure level of electromagnetic noise is moderate. Taken together, the 24‐slot–10‐pole scheme is more reasonable for PMSM.