Discrete-Time Modeling and Control of Induction Motors by Means of Variational Integrators and Sliding Modes—Part II: Control Design
| Autor: | Jorge Rivera Dominguez |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Engineering
business.industry Observer (special relativity) Sliding mode control Integral action Discrete time and continuous time Control and Systems Engineering Robustness (computer science) Control theory Algorithm design Electrical and Electronic Engineering business Variational integrator Induction motor |
| Zdroj: | IEEE Transactions on Industrial Electronics. 62:6183-6193 |
| ISSN: | 1557-9948 0278-0046 |
| Popis: | In this paper, two discrete-time control schemes are presented for induction motors (IMs) based on the discrete-time sliding-mode technique. The first controller is designed using the equivalent control method. The second controller is based on a discrete-time equivalent of the super-twisting algorithm, in which the sliding-mode dynamics is robustified by adding an integral action. The nonmeasurable rotor fluxes are estimated by two observers. The first observer design is based on a simple copy of the rotor flux dynamics, whereas the second observer design is based on the sliding-mode technique. A simulation study was carried out for the evaluation of the closed-loop performance of the IM at different sampling periods and to compare results with other discrete-time control techniques. Moreover, the robust performance of the closed-loop IM is investigated under external and internal perturbations. The simulation study predicts that the IM, when in closed-loop with one of the proposed controllers, still performs well at a sampling time of 1250 $\mu\mbox{s}$ , whereas other control strategies start to lose accuracy. Real-time experiments were finally carried out, where the good performance of the proposed strategy is verified. |
| Databáze: | OpenAIRE |
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