Energy optimization of induction motor in transient state under field oriented control

This paper presents an efficient method to optimize the energy absorbed by an induction motor in transient state via optimal control, under the field-oriented control technique. This approach consists of minimizing a cost function by gathering the sum of the copper losses inside the machine, and as a consequence, an optimal rotor flux used in the direct field oriented control is deduced. This set value is obtained by taking into account some dynamic constraints linking flux and speed through a reduced model of the machine. The effectiveness of the proposed strategy is verified by several simulation tests using MATLAB/Simulink.