New benchmark for sensorless induction motor drives and validation of a nonlinear controller using a speed observer

This paper first proposes a new benchmark for sensorless induction motor controllers validation under three operating conditions: (1) low speed with nominal load; (2) high speed with nominal load; (3) case where the motor state is unobservable (at low frequencies). The second part of the paper presents a sensorless field oriented control with sliding mode using an interconnected high gain observer which has been tested and validated on the reference trajectories of this benchmark.