Sensorless active disturbance rejection model predictive torque control using extended state observer for permanent magnet synchronous motors fed by three-phase four-switch inverter
- Publication Type:
- Journal Article
- Kongzhi Lilun Yu Yingyong/Control Theory and Applications, 2016, 33 (5), pp. 676 - 684
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© 2016, Editorial Department of Control Theory & Applications South China University of Technology. All right reserved. A novel sensorless active disturbance rejection model predictive torque control (ADRMPTC) strategy is developed for permanent magnet synchronous motors (PMSMs) fed by three-phase four-switch inverters, an after-faulttopology for a fault-tolerant three-phase six-switch inverter. Firstly the mathematical model of a PMSM fed by a three-phase four-switch inverter is built. Secondly by the use of technique of extended state observer (ESO), a sensorless estimator is constructed to realize rapid and accurate speed identification. Thirdly an active disturbance rejection controller (ADRC), acting as speed regulator, is designed to realize disturbance estimation and disturbance compensation for the purpose of enhancing robustness. Finally a model predictive torque controller (MPTC) is designed in order to reduce the torque and flux ripples. The resultant ESO-based sensorless ADRMPTC strategy for PMSMs fed by an unhealthy inverter has fault-tolerant ability with dynamical performance very close to the PMSMs fed by a healthy inverter. On the other hand, compared with PI-based MPTC strategy, the ADRMPTC strategy enables the PMSMs to possess better command-following characteristics and stronger robustness in the presence of variations of reference speed and load torque. The simulation results validate the feasibility and effectiveness of the proposed scheme.
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