Backstepping control for an induction motor using an adaptive sliding rotor-flux observer

Sensorless sliding mode observer for a five-phase permanent magnet synchronous motor drive

“…However, few activities treat the sensorless control of multiphase machines namely speed sensorless DTC method of five-phase IPMSM [2], model reference system [13], Kalman filtering technique [14] and SMO of five-phase induction motor [15]. Among these approaches, SMO constitute one of the prospective state observation methodologies of the electric machine drives due to their salient features such as disturbance rejection, order reduction control and simple algorithm implementation [16].…”

“…The principle of SMO applied to five-phase PMSM is based on the error of stator currents generated from their measured and estimated values which must be converged toward zero via sliding mode surface [16]. The SMO stability is proved based on the Lyapunov theory.…”

New Sensorless Sliding Mode Control of a Five-phase Permanent Magnet Synchronous Motor Drive Based on Sliding Mode Observer

“…Compared to these approaches, the sliding mode observer has several features such as robustness to disturbance, order reduction control and simple algorithm implementation [18]. However, the main disadvantage of SMO is the chattering.…”

“…It is to be noted that the sign function causes chattering so that it is replaced by sat function as defined in [18]. In the next section, a sliding mode observer will be developed for the estimation of rotor speed and rotor position for a five phase permanent magnet synchronous motor.…”

A Practical Scheme for Induction Motor Modelling and Speed Control

“…Since these flux models are very sensitive to motor parameters changes, advanced observer technique and adaptive control algorithm can be used [11]. An adaptive sliding rotor-flux observer was presented in [12], which was provided with an adaptive mechanism of rotor resistance. Simple and effective design criteria of rotor flux reduced-order observers for induction motors were proposed in [13], and a sensitivity analysis was carried out in the presence of variations of all the motor parameters.…”