Abstract
A practical scheme for induction motor modelling and speed control based on field oriented control is presented in this paper. Simplified model of the induction motor is constructed for simulations, which is time-saving and very suitable for controller design in Matlab/Simulink. Actual rotor speed signal is measured to modify the original rotor flux observer, which cannot perform well at low speeds, and conventional proportional-integral controllers are used in both speed and current loops for a desired speed. Comparative simulations and experimental results demonstrate the effectiveness of the proposed scheme, and the induction motor performs well at both high and low speeds.
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