Investigation of Direct Torque Control-Based Synchronous Reluctance Motor Drive for Pumping
This paper discusses direct torque control (DTC) strategy for a synchronous reluctance motor (SynRM). In this article, the SynRM is used to drive the centrifugal pump that requires high power density. A mathematical model of SynRM is formed using dynamic
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Abstract This paper discusses direct torque control (DTC) strategy for a synchronous reluctance motor (SynRM). In this article, the SynRM is used to drive the centrifugal pump that requires high power density. A mathematical model of SynRM is formed using dynamic equations. This motor model is then simulated using MATLAB Simulink. The suggested DTC control is analysed for different speeds, and the results are illustrated. The control strategy is simulated, and its performance parameters (flux and current along direct and quadrature axes) are analysed. Simulation results of the synchronous reluctance motor (SynRM) and pump are presented in this paper to determine the performance of the drive.
Keywords Direct torque control (DTC) Centrifugal pumps Dynamic modelling MATLAB Simulink Synchronous reluctance motor (SynRM)
V.K. Arun Shankar S. Umashankar (&) K. Venkatesh Department of Energy and Power Electronics, Vellore Institute of Technology (VIT) University, Vellore, Tamil Nadu, India e-mail: [email protected] V.K. Arun Shankar e-mail: [email protected] K. Venkatesh e-mail: [email protected] S. Paramasivam Danfoss Industries Private Limited, Chennai, Tamil Nadu, India e-mail: [email protected] P. Sanjeevikumar Department of Electrical and Electronics Engineering, University of Johannesburg, Auckland Park, Johannesburg, South Africa e-mail: [email protected] © Springer Nature Singapore Pte Ltd. 2018 A. Konkani et al. (eds.), Advances in Systems, Control and Automation, Lecture Notes in Electrical Engineering 442, https://doi.org/10.1007/978-981-10-4762-6_30
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1 Introduction The rotor structure of a synchronous reluctance motor (SynRM) is robust and simple [1]. They are capable of rotating at very higher speeds in hot climatic conditions also, since there are no windings in the rotor [2, 3]. The modelling and simulation of SynRM are carried out using MATLAB/Simulink software. MATLAB consists of a variety of block sets and toolboxes depending on requirements. For modelling the drive, Simulink provides the necessary components. SynRM was created from the dynamic equations that describe the motor [4]. The electrical parameters must be known for simulation of any machine. These parameters can be either calculated or measured [5, 6]. In asynchronous motors, air-gap flux induces the rotor currents. Whereas for permanent magnet synchronous motor and synchronous reluctance motor, the rotor currents are generated using permanent magnet or field winding [7, 8]. Figure 1 shows the stator and rotor laminations of the synchronous reluctance motor. Mutual flux linkage along d-axis can be calculated using the following equations: b ¼ kws1 Ns 2 sp l0 B ^ dd w md p
Fig. 1 SynRM—stator rotor laminations
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Investigation of Direct Torque Control-Based Synchronous …
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Fig. 2 Simulated SynRM drive in Simulink
Calculating Ld and Lq for any rotor structure, the model of synchronous machine can be treated as synchronous reluctance machine. Figu
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