A Sliding Mode Control associated to the Field-Oriented Control of Dual-Stator Induction Motor Drives Hocine Amimeur, Rachid Abdessemed, Djamal Aouzellag, Elkheir Merabet and Farid Hamoudi Abstract— A sliding mode control strategy associated to the field-oriented control of dual-stator induction motor drives is discussed in this paper. The induction machine has two sets of stator three-phase windings spatially shifted by 30 electrical degrees. The sliding mode control is a robust non linear algorithm which uses discontinuous control to force the system states trajectories to join some specified sliding surface. It has been widely used for its robustness to model parameter uncertainties and external disturbances. The simulation results are presented. Index Terms— Field-Oriented Control (FOC), Dual-Stator In- duction Motor Drives (DSIM), Sliding Mode Control (SMC). I. I NTRODUCTION I NVENTED by Nikola Tesla in 1888, the alternating-current (AC) induction motor has had a major role in the develop- ment of the electrical industry [1]. The primary advantages of induction machine are less maintenance cost, brushless construction (squirrel-cage rotor), better transient, etc. Since the late 1920s, dual-stator AC machines have been used in many applications (such as: pumps, fans, compressors, rolling mills, cement mills, mine hoists [2]), for their advan- tages in power segmentation, reliability, lower torque pulsa- tions, less dc-link current harmonics, reduced rotor harmonics and higher power per ampere ratio for the same machine volume, etc. [3] – [6]. The sliding mode control theory was proposed by Utkin in 1977 [7]. Thereafter, the theoretical works and its applications of the sliding mode controller were developed. Since the robustness is the best advantage of a sliding mode control, it has been widely employed to control nonlinear systems, es- pecially the systems that have model uncertainty and external disturbance [8], [9]. These advantages justify the necessity of applying this kind of control for the DSIM. The paper is organized as follows. Description of the DSIM and the mathematical model are provides in Section II. The field oriented control of an DSIM is developed in Section III. The sliding mode control theory is presented in Section IV. The sliding mode control of an DSIM is developed in Section —————————————————— H. Amimeur, R. Abdessemed, E. Merabet and F. Hamoudi are with the group LEB-Research Laboratory, Department of Electrical Engineering, Uni- versity of Batna. Street Chahid Mohamed El hadi Boukhlouf, 05000, Batna, Algeria (e-mail: amimeurhocine2002@yahoo.fr; r.abdessemed@lycos.com; merabet elkheir@yahoo.fr; f hamoudi@yahoo.fr). D. Aouzellag was with Electrical Engineering Department, A. Mira Uni- versity, Bejaia, Algeria (e-mail: aouzellag@hotmail.com). V and its proprieties are validated through simulation results in Section VI. Finally, Section VII summarizes conclusions. II. MACHINE MODEL A schematic of the stator and rotor windings for a dual- stator induction machine is given in Fig. 1. The six stator phases are divided into two wye-connected three-phase sets, labled (a s1 ,b s1 ,c s1 ) and (a s2 ,b s2 ,c s2 ), whose magnetic axes are displaced by α = 30 electrical angle. The windings of each three-phase set are uniformly distributed and have axes that are displaced 120 apart. The three-phase rotor windings (a r ,b r ,c r ) are also sinusoidally distributed and have axes that are displaced by 120 apart [10] – [12]. The following assumptions have been made in deriving the dual-stator induction machine model: • Machine windings are sinusoidally distributed; • The two stars have same parameters; • Flux path is linear; • The magnetic saturation and the mutual leakage are neglected. The electrical equations of the dual-stator induction motor drives in the synchronous reference frame (d − q) are given Fig. 1. Dual-stator windings induction machine.