Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives
Abstract This paper presents an improved model reference adaptive system (MRAS) speed observer for sensorless induction motor drives (SIMDs) with rotor flux correction terms. Instead of relying only on the rotor flux estimate, which has issues with pure integration at low speeds, the suggested MRAS...
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Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-98178-7 |
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| author | Mohamed S. Zaky Mohamed K. Metwaly |
| author_facet | Mohamed S. Zaky Mohamed K. Metwaly |
| author_sort | Mohamed S. Zaky |
| collection | DOAJ |
| description | Abstract This paper presents an improved model reference adaptive system (MRAS) speed observer for sensorless induction motor drives (SIMDs) with rotor flux correction terms. Instead of relying only on the rotor flux estimate, which has issues with pure integration at low speeds, the suggested MRAS observer employs the dq stator currents and their estimation errors in the adjustable model of the IM. The rotor flux dynamics are considered correction terms for the estimated stator current to update and improve the estimated speed’s accuracy. The adaptation process uses a fuzzy logic controller (FLC) rather than a traditional PI controller to enhance the robustness of the suggested technique. A DSP-DS1103-based laboratory prototype is used to evaluate the proposed stator current-based MRAS observer with FLC for indirect field-oriented control (IFOC) of SIMDs. The simulations are executed using Matlab/Simulink. Additionally, a comparison is made between the performance of the suggested and traditional MRAS schemes. The tests demonstrate the accuracy and robustness of the improved MRAS observer in four quadrant modes of operation, especially at very low and zero speeds. |
| format | Article |
| id | doaj-art-127de9e9b4994dd283a2c07b85a1d4ec |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-127de9e9b4994dd283a2c07b85a1d4ec2025-08-20T03:52:24ZengNature PortfolioScientific Reports2045-23222025-04-0115112010.1038/s41598-025-98178-7Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drivesMohamed S. Zaky0Mohamed K. Metwaly1Department of Electrical Engineering, College of Engineering, Northern Border UniversityDepartment of Electrical Engineering, College of Engineering, Taif UniversityAbstract This paper presents an improved model reference adaptive system (MRAS) speed observer for sensorless induction motor drives (SIMDs) with rotor flux correction terms. Instead of relying only on the rotor flux estimate, which has issues with pure integration at low speeds, the suggested MRAS observer employs the dq stator currents and their estimation errors in the adjustable model of the IM. The rotor flux dynamics are considered correction terms for the estimated stator current to update and improve the estimated speed’s accuracy. The adaptation process uses a fuzzy logic controller (FLC) rather than a traditional PI controller to enhance the robustness of the suggested technique. A DSP-DS1103-based laboratory prototype is used to evaluate the proposed stator current-based MRAS observer with FLC for indirect field-oriented control (IFOC) of SIMDs. The simulations are executed using Matlab/Simulink. Additionally, a comparison is made between the performance of the suggested and traditional MRAS schemes. The tests demonstrate the accuracy and robustness of the improved MRAS observer in four quadrant modes of operation, especially at very low and zero speeds.https://doi.org/10.1038/s41598-025-98178-7EstimatorsInduction motorsSensorless drivesMRASLow speed |
| spellingShingle | Mohamed S. Zaky Mohamed K. Metwaly Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives Scientific Reports Estimators Induction motors Sensorless drives MRAS Low speed |
| title | Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives |
| title_full | Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives |
| title_fullStr | Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives |
| title_full_unstemmed | Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives |
| title_short | Improved MRAS observer with rotor flux correction terms and FLC-based adaptive law for sensorless induction motor drives |
| title_sort | improved mras observer with rotor flux correction terms and flc based adaptive law for sensorless induction motor drives |
| topic | Estimators Induction motors Sensorless drives MRAS Low speed |
| url | https://doi.org/10.1038/s41598-025-98178-7 |
| work_keys_str_mv | AT mohamedszaky improvedmrasobserverwithrotorfluxcorrectiontermsandflcbasedadaptivelawforsensorlessinductionmotordrives AT mohamedkmetwaly improvedmrasobserverwithrotorfluxcorrectiontermsandflcbasedadaptivelawforsensorlessinductionmotordrives |