Abbasi, Muhammad Abbas and Husain, Abdul Rashid and Nik Idris, Nik Rumzi and ur Rehman, Syed Muhammad Fasih (2021) Computationally efficient predictive torque control for induction motor drives based on flux positional errors and extended Kalman filter. IET Electric Power Applications, 15 (6). pp. 653-667. ISSN 1751-8660
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Official URL: http://dx.doi.org/10.1049/elp2.12035
Abstract
This paper proposes an improved model based predictive torque control (MPTC) method based on positional error between reference and estimated stator flux vectors. The main advantages of the proposed method are: the improved computational efficiency which requires minimum hardware resources and weighting-factor-free cost function. Weighting factor is removed by using modified reference transformation, which converts torque reference into equivalent stator flux reference. Improvement in computational performance is achieved by using decreased number of voltage vectors for prediction. An admissibility criterion based on flux positional errors is introduced to reduce the number of voltage vectors. The computational time saved is utilised to incorporate extended Kalman filter for better estimation of flux and torque. The validity of the proposed method is tested on a two-level three-phase inverter fed induction motor drive with dSpace DS1104 as controller board. The dynamic response and computational cost of the proposed method is compared to other established MPTC methods. The superiority of the proposed technique is confirmed by experimental results, which show an average of 32% reduction in computational time when compared to conventional MPTC while comparable dynamic response in terms of torque ripple, flux ripple and load current harmonics, is also maintained.
Item Type: | Article |
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Uncontrolled Keywords: | positional error, induction motor drive |
Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
Divisions: | Electrical Engineering |
ID Code: | 95331 |
Deposited By: | Widya Wahid |
Deposited On: | 29 Apr 2022 22:26 |
Last Modified: | 29 Apr 2022 22:26 |
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