Abstract
In this paper, a practical maximum torque per ampere control scheme along with a simple parameter estimator for PMa-SynRM is introduced. In this method, MTPA condition is achieved by calculation of the output torque and perturbing one variable while seeking the maximum output torque at the particular operating point. The maximization of the electromagnetic torque might be sensitive to the variation of the motor parameters and also load torque. In order to reduce this sensitivity, a simple online parameter estimator is introduced and used to estimate the motor parameters and calculate the electromagnetic torque more accurately. In this case, variation and dynamics of the load are not affecting the behavior of the introduced controller.
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