Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine
In switched-flux permanent magnet (SFPM) machines, the 6th-harmonic back electromotive force (EMF) is dominant, whilst the 3rd-harmonic back-EMF is much smaller. This paper proposes several new position estimation methods for sensorless control based on the 6th-harmonic back-EMF. Firstly, by detecti...
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2016
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rr-article-95464432016-01-01T00:00:00Z Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine Tzu-Chi Lin (1384893) J.M. Liu (7205432) Zi-Qiang Zhu (1476550) Mechanical engineering not elsewhere classified Harmonic back-EMF High-resolution rotor position estimator Permanent magnet machine SFPM machine Sensorless control Switched flux Mechanical Engineering not elsewhere classified In switched-flux permanent magnet (SFPM) machines, the 6th-harmonic back electromotive force (EMF) is dominant, whilst the 3rd-harmonic back-EMF is much smaller. This paper proposes several new position estimation methods for sensorless control based on the 6th-harmonic back-EMF. Firstly, by detecting the zero-crossings of the 6th-harmonic back-EMF with/without eliminating the influence of the 3rd-harmonic back EMF, the related rotor positions can be determined precisely at these zero-crossings. However, since the intermediate rotor positions need to be determined by linear interpretation between two zero-crossings, it only exhibits excellent performance under steady state. Furthermore, the continuous rotor position can be estimated from the proposed new observer by utilizing the combined signals of 6th-harmonic back-EMF and flux-linkage, together with a synchronous reference frame filter (SRFF) and harmonic elimination. Experimental validation show that (a) by eliminating the 3rd-harmonic back-EMF effect, the accuracy of the proposed 6th-harmonic back-EMF zero-crossings detection method can be improved, (b) SRFF is effective to minimize the influence of non-constant amplitudes of the 6th-harmonic backEMF and flux-linkage, (c) the comparison between the fundamental, the 3rd-harmonic back-EMF and the proposed method are presented in order to highlight the effectiveness of proposed control strategy under different operating conditions. 2016-01-01T00:00:00Z Text Conference contribution 2134/24443 https://figshare.com/articles/conference_contribution/Sixth-harmonic_back-EMF_based_sensorless_control_for_switched-flux_permanent_magnet_machine/9546443 CC BY-NC-ND 4.0 |
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Mechanical engineering not elsewhere classified Harmonic back-EMF High-resolution rotor position estimator Permanent magnet machine SFPM machine Sensorless control Switched flux Mechanical Engineering not elsewhere classified |
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Mechanical engineering not elsewhere classified Harmonic back-EMF High-resolution rotor position estimator Permanent magnet machine SFPM machine Sensorless control Switched flux Mechanical Engineering not elsewhere classified Tzu-Chi Lin J.M. Liu Zi-Qiang Zhu Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine |
| description |
In switched-flux permanent magnet (SFPM) machines, the 6th-harmonic back electromotive force (EMF) is dominant, whilst the 3rd-harmonic back-EMF is much smaller. This paper proposes several new position estimation methods for sensorless control based on the 6th-harmonic back-EMF. Firstly, by detecting the zero-crossings of the 6th-harmonic back-EMF with/without eliminating the influence of the 3rd-harmonic back EMF, the related rotor positions can be determined precisely at these zero-crossings. However, since the intermediate rotor positions need to be determined by linear interpretation between two zero-crossings, it only exhibits excellent performance under steady state. Furthermore, the continuous rotor position can be estimated from the proposed new observer by utilizing the combined signals of 6th-harmonic back-EMF and flux-linkage, together with a synchronous reference frame filter (SRFF) and harmonic elimination. Experimental validation show that (a) by eliminating the 3rd-harmonic back-EMF effect, the accuracy of the proposed 6th-harmonic back-EMF zero-crossings detection method can be improved, (b) SRFF is effective to minimize the influence of non-constant amplitudes of the 6th-harmonic backEMF and flux-linkage, (c) the comparison between the fundamental, the 3rd-harmonic back-EMF and the proposed method are presented in order to highlight the effectiveness of proposed control strategy under different operating conditions. |
| format |
Default Conference proceeding |
| author |
Tzu-Chi Lin J.M. Liu Zi-Qiang Zhu |
| author_facet |
Tzu-Chi Lin J.M. Liu Zi-Qiang Zhu |
| author_sort |
Tzu-Chi Lin (1384893) |
| title |
Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine |
| title_short |
Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine |
| title_full |
Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine |
| title_fullStr |
Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine |
| title_full_unstemmed |
Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine |
| title_sort |
sixth-harmonic back-emf based sensorless control for switched-flux permanent magnet machine |
| publishDate |
2016 |
| url |
https://hdl.handle.net/2134/24443 |
| _version_ |
1797465131345510400 |