A comparison of saliency based sensorless control techniques for a PM machine
This thesis analyzes saliency-based sensorless control methods for AC surface mounted permanent magnet machines (PMSM), because PMSMs have features that make them attractive for use in industrial drives: small size, high efficiency, low maintenance, high dynamics, and high power density. The thesis...
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| Format: | Thesis (University of Nottingham only) |
| Language: | English |
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2012
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| Online Access: | https://eprints.nottingham.ac.uk/14453/ |
| _version_ | 1848791964483321856 |
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| author | Duan, Yu |
| author_facet | Duan, Yu |
| author_sort | Duan, Yu |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This thesis analyzes saliency-based sensorless control methods for AC surface mounted permanent magnet machines (PMSM), because PMSMs have features that make them attractive for use in industrial drives: small size, high efficiency, low maintenance, high dynamics, and high power density. The thesis focuses on four different HF injection sensorless methods, which utilize resistance and inductance based saliencies for position estimation: the measurement axis method, the eddy current resistance based saliency tracking method, the eddy current inductance based saliency tracking method, and the PWM switching frequency injection method. The emphasis is in the comparison of the four HF saliency tracking methods under various conditions such as steady state, load impact, speed reversal, and zero and low speed operation. The amplitude and frequency of the injection signals are also compared to choose the best HF injection signal for the four saliency tracking methods. The best sensorless control method using eddy current resistance based saliency is introduced and the experimental results confirm the expected advantages for this sensorless application.
This thesis also describes the development and enhancement of current derivative measurement for saliency tracking methods, which uses the stator current transient response to the voltage vectors contained in the fundamental PWM sequence. Due to the HF switching oscillations caused by the switching of the IGBT and parasitic capacitance, the accuracy of the current measurement is reduced and requires a minimum vector time of approximately 6µs. A signal processing algorithm is proposed which uses current samples during the high frequency current oscillations, and can potentially reduce this minimum pulse time. |
| first_indexed | 2025-11-14T18:36:52Z |
| format | Thesis (University of Nottingham only) |
| id | nottingham-14453 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T18:36:52Z |
| publishDate | 2012 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-144532025-02-28T11:30:56Z https://eprints.nottingham.ac.uk/14453/ A comparison of saliency based sensorless control techniques for a PM machine Duan, Yu This thesis analyzes saliency-based sensorless control methods for AC surface mounted permanent magnet machines (PMSM), because PMSMs have features that make them attractive for use in industrial drives: small size, high efficiency, low maintenance, high dynamics, and high power density. The thesis focuses on four different HF injection sensorless methods, which utilize resistance and inductance based saliencies for position estimation: the measurement axis method, the eddy current resistance based saliency tracking method, the eddy current inductance based saliency tracking method, and the PWM switching frequency injection method. The emphasis is in the comparison of the four HF saliency tracking methods under various conditions such as steady state, load impact, speed reversal, and zero and low speed operation. The amplitude and frequency of the injection signals are also compared to choose the best HF injection signal for the four saliency tracking methods. The best sensorless control method using eddy current resistance based saliency is introduced and the experimental results confirm the expected advantages for this sensorless application. This thesis also describes the development and enhancement of current derivative measurement for saliency tracking methods, which uses the stator current transient response to the voltage vectors contained in the fundamental PWM sequence. Due to the HF switching oscillations caused by the switching of the IGBT and parasitic capacitance, the accuracy of the current measurement is reduced and requires a minimum vector time of approximately 6µs. A signal processing algorithm is proposed which uses current samples during the high frequency current oscillations, and can potentially reduce this minimum pulse time. 2012-07-13 Thesis (University of Nottingham only) NonPeerReviewed application/pdf en arr https://eprints.nottingham.ac.uk/14453/1/580275.pdf Duan, Yu (2012) A comparison of saliency based sensorless control techniques for a PM machine. PhD thesis, University of Nottingham. HF injection sensorless methods Saliency tracking Injection signals Eddy current resistance Current derivative measurment |
| spellingShingle | HF injection sensorless methods Saliency tracking Injection signals Eddy current resistance Current derivative measurment Duan, Yu A comparison of saliency based sensorless control techniques for a PM machine |
| title | A comparison of saliency based sensorless control techniques for a PM machine |
| title_full | A comparison of saliency based sensorless control techniques for a PM machine |
| title_fullStr | A comparison of saliency based sensorless control techniques for a PM machine |
| title_full_unstemmed | A comparison of saliency based sensorless control techniques for a PM machine |
| title_short | A comparison of saliency based sensorless control techniques for a PM machine |
| title_sort | comparison of saliency based sensorless control techniques for a pm machine |
| topic | HF injection sensorless methods Saliency tracking Injection signals Eddy current resistance Current derivative measurment |
| url | https://eprints.nottingham.ac.uk/14453/ |