摘要
Accurate calculation of the natural frequencies of permanent magnet synchronous motors( PMSMs) is essential to the prediction of vibration and noise of PMSMs. The analytical and numerical methods are respectively used to calculate natural frequencies of stator yoke,stator core,stator core with windings,motor casing and stator system. It is found that the relative errors between calculated results with traditional analytical formulas and numerical results are very large. For the sake of reducing relative errors,novel analytical formulas of calculating circumferential modal frequencies of stator core,stator core with windings,motor casing and stator system are proposed. Compared with the results of numerical and experimental modal analysis,the effectiveness of novel analytical formulas is verified.
Accurate calculation of the natural frequencies of permanent magnet synchronous motors( PMSMs) is essential to the prediction of vibration and noise of PMSMs. The analytical and numerical methods are respectively used to calculate natural frequencies of stator yoke,stator core,stator core with windings,motor casing and stator system. It is found that the relative errors between calculated results with traditional analytical formulas and numerical results are very large. For the sake of reducing relative errors,novel analytical formulas of calculating circumferential modal frequencies of stator core,stator core with windings,motor casing and stator system are proposed. Compared with the results of numerical and experimental modal analysis,the effectiveness of novel analytical formulas is verified.
基金
Sponsored by the National Natural Science Foundation of China(Grant o.51175350)
