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http://dx.doi.org/10.6113/JPE.2016.16.2.572

A DTC Stator Flux Algorithm for the Performance Improvement of Induction Traction Motors  

Van-Tien, Pham (School of Electrical Engineering, Beijing Jiaotong University)
Zheng, Trillion Q. (School of Electrical Engineering, Beijing Jiaotong University)
Yang, Zhong-ping (School of Electrical Engineering, Beijing Jiaotong University)
Lin, Fei (School of Electrical Engineering, Beijing Jiaotong University)
Do, Viet-dung (Department of Mechanical Engineering, University of Transport and Communications)
Publication Information
Journal of Power Electronics / v.16, no.2, 2016 , pp. 572-583 More about this Journal
Abstract
In view of the speed control characteristics of induction traction motors and the problems of direct torque control (DTC) algorithms in current applications, this paper presents a DTC algorithm characterized by a symmetrical polygon flux control and a closed loop power control in the constant-torque base speed region and constant-power field-weakening region of induction traction motors. This algorithm only needs to add a stator flux control algorithm to the traditional DTC structures. This has the benefit of simplicity, while maintaining the features of traditional algorithms such as a rapid dynamic response, uncomplicated control circuit, reduced dependence on motor parameters, etc. In addition, it obtains a smoother flux trajectory that is conducive to improvement of the harmonic elimination capability, the switching frequency utilization as well as the torque and power performance in the field-weakening region. The effectiveness and feasibility of this DTC algorithm are demonstrated by both theoretical analysis and experimental results.
Keywords
AC motor drives; Direct torque control; Induction rotating machines; Torque control; Traction motor drives;
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