A comparison of speed-sensorless induction motor control with torque compensation

This paper compares two indirect field oriented control approaches of speed sensorless MRAS schemes. The first scheme is a feedback linearization control of an induction motor including proportional integral compensation. The second is a modify feedback linearization scheme, where the current control is composed only by proportional integral controllers. Experimental analyses of the feedback linearization control demonstrate that it requires a larger computation effort as well as it has high sensitivity to model parameters variation. In order to overcome these limitations, this paper proposes a modified scheme based on two PI controllers to generate the stator drive voltage. Simulation and experimental results, in DSP TMS 320F2812 based platform, are provided to evaluate both control schemes performance.