Abstract
In the framework of the sensorless non-linear control of a PWM fed induction motor drive, an original strategy is proposed. The latter is an association of the control based on the Inputs-Outputs (I/O) system lineatharion [2], with a MRAS (Model Reference Adaptive System) state observer [7]. The observer design and synthesis uses Popov’s hyper-stability theory. For the sensorless drive, the rotation speed adaptive law is proposed [5]. All control and observation parameters are determined analytically. The precise simulations of the global system allow to testing the basic Operation functions of this drive and especially the good behaviour at very low rotation speed. Significant experimental results are discussed to illustrate the dynamic performances of this induction motor drive in the four quadrants of the torque – speed plane.
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