An improved voltage model based on stator resistance estimation for FOC technique in the induction motor drive

Anotace: The paper presents an improvement in estimating the rotor flux angle using the voltage model of the field-oriented control (FOC) technique for the induction motor speed control. The voltage model uses the inputs including the stator voltages and current signals to estimate the rotor flux angle for FOC method. However, the inaccuracy of the stator resistance value can affect the estimation of the rotor flux angle, leading to a decline in the performance of the control method. An adaptive tuning method based on the machine model is used to estimate the stator resistance to enhance the accuracy of the rotor flux angle in the FOC method. Simulations of the induction motor drive (IMD) operating in test cases of stator resistance variations have been performed to verify the effectiveness of the proposed method.