Volume 20, Issue 4 (JIAEEE Vol.20 No.4 2023)                   Journal of Iranian Association of Electrical and Electronics Engineers 2023, 20(4): 55-63 | Back to browse issues page

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Feyz E, Hosseinpour M, Dejamkhooy A, Mousavi-Aghdam S R. Low-Cost Direct Torque Control for Induction Motor Using Single DC-Link Current Sensor. Journal of Iranian Association of Electrical and Electronics Engineers 2023; 20 (4) :55-63
URL: http://jiaeee.com/article-1-1346-en.html
Low-Cost Direct Torque Control for Induction Motor Using Single DC-Link Current Sensor
Ezzatlai Feyz , Majid Hosseinpour * , Abdolmajid Dejamkhooy , Seyed Reza Mousavi-Aghdam
Department of Electrical Engineering, University of Mohaghegh Ardabili
Abstract:   (840 Views)
Various methods have been proposed to control the speed of induction motors. Among these methods, the direct torque control (DTC) method contains the desired dynamic response. One of the main problems of DTC is the expensive hardware of this type of drivers, especially the current sensors cost. In practice, at least three current sensors are required, two of which are located on the output phases of the inverter and one sensor on the inverter’s DC link for protection purposes. The aim of this paper is to present a new and inexpensive method for direct torque control of induction motor using only one DC link current sensor. In this method, the zero vector is removed and each of the real vectors 1 to 6 is replaced by two proposed virtual vectors. As a result, it is possible to estimate the phase currents of the motor utilizing only one current sensor in the DC link for a wide range of speeds, even low speeds and close to zero speeds. Another advantage of the proposed method is its constant switching frequency. The proposed idea is simulated using Matlab/Simulink environment and the dynamic response of the system is improved. Also, the ripple reduction in the flux as well as the torque of motor is obtained compared to the conventional DTC method.
Keywords: Induction motor, Direct Torque Control, DC link current Sensor, Virtual vector
Full-Text [PDF 1529 kb]   (363 Downloads)    
Type of Article: Research | Subject: Power
Received: 2021/07/7 | Accepted: 2022/12/28 | Published: 2023/08/6
Extended Abstract [PDF 361 KB]  (15 Download)
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