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| Received:July 01, 2012Revised:November 21, 2012 |
| 基金项目:This work was supported by the National Engineering School of Monastir, Tunisia. |
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| A predictive controller for induction motors using an unknown input observer for online rotor resistance estimation and an update technique for load torque |
| Hanen CHEHIMI,Salim HADJ SA¨ID,Faouzi MSAHLI |
| (Department of Electrical Engineering, National Engineering School of Monastir) |
| Abstract: |
| This paper deals with the design of an output feedback predictive controller for induction motors. The fundamental interest of the proposed controller is the capability of decoupling the mechanical speed and the rotor fluxes, without degradation against the variation of rotor resistance and load torque. Hence, the contribution is to apply two estimation procedures in order to achieve this goal. Namely, an unknown input observer (UIO) is used for the constant time estimation whereas a heuristic solution is exploited for the load torque update. Moreover, rotor flux components are recovered as an unavailable state of the system. Effectiveness of the proposed observers and the performance of the controller are confirmed by simulation results. |
| Key words: Predictive controlle UIO Induction motors Parameters estimation |
