DESIGN OF ROBUST CONTROL SYSTEM FOR THE PMSM MOTOR

Ahmed Azaiz - Youcef Ramdani - Abdelkader Meroufel

   The field orientation control (FOC) consists in regulating the flux by a component of the current and the torque by the other component. So, it is necessary to choose a system of axes $d$ and $q$ and a law of control ensuring the decoupling of the torque and flux. In the case of the permanent magnets synchronous machine, if current $i_d$ is maintained null, the reaction flux of the stator is in quadrate with the flux produced by the permanent magnets, then the torque becomes directly proportional to the current$i_q$, and the model of the machine becomes equivalent to that of the DC machine. As a result the model of the PMSM machine is divided into two independent SISO systems. In this article, we present the design of $H_{\infty}$ suboptimal controllers for the PMSM motor.

Keywords: lshort-term scheduling, potential energy, discrete maximum principle, augmented Lagrangian method, discretized horizon

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