International Journal of Power Electronics and Drive System (IJPEDS) Vol. 10, No. 4, December 2019, pp. 1758~1771 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v10.i4.pp1758-1771  1758 Journal homepage: http://iaescore.com/journals/index.php/IJPEDS Advanced control structures for induction motors with ideal current loop response using field oriented control Vo Thanh Ha 1 , Nguyen Tung Lam 2 , Vo Thu Ha 3 , Vo Quang Vinh 4 1 Faculty of Electrical and Electrical Engineering, University of Transport and Communications, Vietnam. 2 School of Electrical Engineering, Hanoi University of Science and Technology, Vietnam. 3 Faculty of Electrical Engineering, University of Economics - Technology for Industries, Vietnam. 4 Faculty of Control and Automation, Electric Power University, Vietnam Article Info ABSTRACT Article history: Received Apr 17, 2019 Revised Jul 22, 2019 Accepted Aug 3, 2019 Field oriented control (FOC) is widely used for high performance induction motor (IM) electrical drive systems. Typically, FOC uses linear controls and space vector modulation (SVM) to control the fundamental components of the stator voltages. This work shows that based on a fast and precise inner current loop response one may flexibly employ different advanced control methods, to achieve high performance outer loops (speed and flux control). In this paper, novel approaches based on dead-beat scheme for the current loop combining with exact linearization, backstepping controls, and fatness- based methods for the outer loop are proposed. By comparing with classical PI control, the proposed method shows the outstanding features of system response such as fast, accurate and decoupling properties. The performance evaluation is given by experimental results. Keywords: Field oriented control Backstepping Exact linearization Deadbeat control Flatness-based control Copyright © 2019 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Nguyen Tung Lam, School of Electrical Engineering, Hanoi University of Science and Technology, No.1, Dai Co Viet Road, Hai Ba Trung, Hanoi, Vietnam. Email: lam.nguyentung@hust.edu.vn 1. INTRODUCTION Nowadays, asynchronous electrical drives based on field-oriented control (FOC) have been widely used in industrial applications [1]. Based on this method, we can find induction motors have similar characteristics to separate excitation DC motors in term of generating magnetic field and torque [1-4]. In the FOC structure, when the stator voltage control satisfies the requirement of “fast – accuracy – decoupling” properties in current response, the induction motor can be considered as fed by a current source inverter with controllable current, which leads to order reduction of the model of induction motor drive from 4 th to 2 th order [1]. The article presents different methods to design the inner loop (stator current loop) and outer loop (flux and speed loops). Firstly, deadbeat control with finite response is employed for the current loops [5-7]. Secondly, exact linearization is utilized to transform the non-linear dynamics of current model into linear input-output relationship, thus it is able to apply common linear controls to the current model [8, 9]. In addition, to demonstrate current performances, a classical PI current controller is also designed [10-13] for benchmarking purpose. The closed-loop current response based on deadbeat, exact linearization control is evaluated to identify the most suitable control for the current loops. The success in designing a control for the current loops can lead to the assumption of ideal current loop response that results in the system order reduction. Subsequently, the design control of the electrical drive system outer loops based on reducing order model can be performed in various methods. The classical PI controller can only be effective around the operating point. When operating in a wide range the system performance can be degraded [10-13].