New Lyapunov backstepping control of the mechanical power generated by an induction motor

This paper presents a new Lyapunov backstepping control law (LBC) that makes it possible to control the mechanical power generated by an induction motor (IM), while guaranteeing its robustness and stability. This induction motor is supplied by the stator variables via two converters. One, a mains converter (two-level rectifier), facilitates the control of the direct courant (DC) bus and improves the mains power factor; the other, a motor converter (two-level inverter), enables precise control and optimisation of the energy flow during motor operation. In the first part, we presented the modelling of our motor and its converters. In the second part, we presented the control structure proposed to control and optimise the mechanical energy generated by our motor (speed, torque) to achieve optimum efficiency and transfer quality. The results of the numerical simulations demonstrate the effectiveness of the new Lyapunov control system in achieving these objectives, i.e. mechanical speed outside its references and electromagnetic torque below the nominal torque.