Input power minimization at inverter fed induction motor drive system with FOC by field weakening

In cases where power resources are limited, the power consumption of an induction motor drive system is an essential question. With minimization of the size of the current´s vectors in field-oriented control (FOC) of the induction motor, minimization of input power can be achieved. In the present paper, the minimization problem and procedure is shown and power savings are compared to traditional FOC. Improvement of the FOC scheme with power minimization is proposed. Simulations of its features are also given.