Robust SVM-direct torque control of induction motor based on sliding mode controller and sliding mode observer

doi:10.1007/s11708-017-0444-z

Front. Energy

2020, Vol. 14

Issue (4) : 836-849 https://doi.org/10.1007/s11708-017-0444-z

RESEARCH ARTICLE

Robust SVM-direct torque control of induction motor based on sliding mode controller and sliding mode observer

Abdelkarim AMMAR(

), Amor BOUREK, Abdelhamid BENAKCHA

LGEB Laboratory, Department of Electrical Engineering, University of Biskra, Biskra, BP 145, Algeria

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Abstract

This paper proposes a design of control and estimation strategy for induction motor based on the variable structure approach. It describes a coupling of sliding mode direct torque control (DTC) with sliding mode flux and speed observer. This algorithm uses direct torque control basics and the sliding mode approach. A robust electromagnetic torque and flux controllers are designed to overcome the conventional SVM-DTC drawbacks and to ensure fast response and full reference tracking with desired dynamic behavior and low ripple level. The sliding mode controller is used to generate reference voltages in stationary frame and give them to the controlled motor after modulation by a space vector modulation (SVM) inverter. The second aim of this paper is to design a sliding mode speed/flux observer which can improve the control performances by using a sensorless algorithm to get an accurate estimation, and consequently, increase the reliability of the system and decrease the cost of using sensors. The effectiveness of the whole composed control algorithm is investigated in different robustness tests with simulation using Matlab/Simulink and verified by real time experimental implementation based on dS pace 1104 board.

Keywords induction motor direct torque control (DTC) space vector modulation (SVM) sliding mode control (SMC) sliding mode observer (SMO) dS1104

Corresponding Author(s): Abdelkarim AMMAR

Online First Date: 08 February 2017 Issue Date: 21 December 2020

Cite this article:

Abdelkarim AMMAR,Amor BOUREK,Abdelhamid BENAKCHA. Robust SVM-direct torque control of induction motor based on sliding mode controller and sliding mode observer[J]. Front. Energy, 2020, 14(4): 836-849.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-017-0444-z
https://academic.hep.com.cn/fie/EN/Y2020/V14/I4/836

Fig.1 Voltage space vector

Fig.2 Speed anti-windup PI controller

Fig.3 Proposed sliding mode stator flux observer

Fig.4 Global diagram of sliding mode DTC (SM-DTC) with SMO

Fig.5 Stator phase current

Fig.6 Electromagnetic torque with load application of 5 N·m

Fig.7 Rotor speed response while sense reversing (1000 r/min; -1000 r/min)

Fig.8 Stator flux magnitude

Fig.9 Stator flux axis components (Wb)

Fig.10 Stator flux circle trajectory

Fig.11 Speed response at low region (200 r/min) with variation of stator resistance R_s +100%

Fig.12 Stator flux magnitude with variation of stator resistance R_s +100%

Fig.13 Estimated flux magnitude at different speed regions with estimation error

Fig.14 Estimated speed at different references and sense reversing (r/min)

Fig.15 Estimated speed at low speed region (100 r/min; -100 r/min) and estimation error

Fig.16 Flux magnitude with parameter variations test R_s and R_r of+100%

Fig.17 Experimental setup

Fig.18 Simplified real time setup scheme

Fig.19 Startup state: real and estimated speed, with estimation error (r/min)

Fig.20 Speed variation: Real and estimated speed with estimation error (rpm)

Fig.21 Steady state: rotor speed, stator phase current (A)

Fig.22 Stator flux magnitude with estimation error(Wb)

Fig.23 Stator flux axes components

Fig.24 Stator flux circle trajectory

Fig.25 Load introduction: torque (N·m), stator current (A)

Fig.26 Load introduction: torque, stator current (A) (ZOOM)

Fig.27 Low speed operation (200 r/min): stator phase current, estimated and real speed, estimation error

Fig.28 Low speed operation (200 r/min ): stator phase current, estimated and real speed, estimation error (ZOOM)

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