Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull
The vibration and noise of permanent magnet synchronous motors (PMSM) are mainly caused by unbalanced magnetic pull (UMP). This paper aims to investigate nonlinear vibration in PMSMs. Firstly, the analytical model of the air-gap magnetic field with an eccentric rotor in PMSM is studied, and the anal...
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MDPI AG
2018-01-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/1/113 |
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| author | Ao Zhang Yan Bai Bo Yang He Li |
| author_facet | Ao Zhang Yan Bai Bo Yang He Li |
| author_sort | Ao Zhang |
| collection | DOAJ |
| description | The vibration and noise of permanent magnet synchronous motors (PMSM) are mainly caused by unbalanced magnetic pull (UMP). This paper aims to investigate nonlinear vibration in PMSMs. Firstly, the analytical model of the air-gap magnetic field with an eccentric rotor in PMSM is studied, and the analytical model is verified by the finite element method. Then the dynamic model of an offset rotor-bearing system is established, and the gyroscopic effect, nonlinear bearing force and UMP are taken into consideration. Finally, the dynamic characteristics of different static displacement eccentricities, rotor offsets and radial clearances are investigated in both the time domain and the frequency domain. The results show that the amplitudes of dynamic responses increase with the static displacement eccentricity and rotor offset and high integer multiples of rotating frequency appear with the increase of displacement eccentricity. The coupling effects of bearing force, unbalanced mass force and UMP are observed in the frequency domain, and the frequency components in the dynamic responses indicate that the bearings have an effect on the system. |
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| issn | 2076-3417 |
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| last_indexed | 2024-04-14T01:41:12Z |
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| spelling | doaj.art-34971ecf25c0436990505050b04fdf5e2022-12-22T02:19:43ZengMDPI AGApplied Sciences2076-34172018-01-018111310.3390/app8010113app8010113Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic PullAo Zhang0Yan Bai1Bo Yang2He Li3School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaThe vibration and noise of permanent magnet synchronous motors (PMSM) are mainly caused by unbalanced magnetic pull (UMP). This paper aims to investigate nonlinear vibration in PMSMs. Firstly, the analytical model of the air-gap magnetic field with an eccentric rotor in PMSM is studied, and the analytical model is verified by the finite element method. Then the dynamic model of an offset rotor-bearing system is established, and the gyroscopic effect, nonlinear bearing force and UMP are taken into consideration. Finally, the dynamic characteristics of different static displacement eccentricities, rotor offsets and radial clearances are investigated in both the time domain and the frequency domain. The results show that the amplitudes of dynamic responses increase with the static displacement eccentricity and rotor offset and high integer multiples of rotating frequency appear with the increase of displacement eccentricity. The coupling effects of bearing force, unbalanced mass force and UMP are observed in the frequency domain, and the frequency components in the dynamic responses indicate that the bearings have an effect on the system.http://www.mdpi.com/2076-3417/8/1/113PMSMunbalanced magnetic pullnonlinear vibrationoffset rotor bearing systemgyroscopic effectcoupling effects |
| spellingShingle | Ao Zhang Yan Bai Bo Yang He Li Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull Applied Sciences PMSM unbalanced magnetic pull nonlinear vibration offset rotor bearing system gyroscopic effect coupling effects |
| title | Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull |
| title_full | Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull |
| title_fullStr | Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull |
| title_full_unstemmed | Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull |
| title_short | Analysis of Nonlinear Vibration in Permanent Magnet Synchronous Motors under Unbalanced Magnetic Pull |
| title_sort | analysis of nonlinear vibration in permanent magnet synchronous motors under unbalanced magnetic pull |
| topic | PMSM unbalanced magnetic pull nonlinear vibration offset rotor bearing system gyroscopic effect coupling effects |
| url | http://www.mdpi.com/2076-3417/8/1/113 |
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