Abstract
High-performance electrical drives can be achieved by usingeld-oriented controllers, which make torque and ux naturally decoupled. A conventional vector-controlle d drive has the disadvantage of either requiring ux and speed sensors or being affected by rotor resistance, which varies along with the motor performance. The presented paper focuses on developing a high-performance sensorless rotor ux-oriented controller of an induction machine independent of the rotor resistance variation. This method applies spectral theory of Walsh functions, which are one of the most helpful members of piecewise constant basis functions in solving dynamic models. Inherent characteristics of Walsh functions and application of an operational matrix will make the system handy and robust against inverter switching effects.
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