18-Sector Direct Torque Controlled Strategy with Improved Stator Flux Estimator for Induction Motor Drive

被引:0
|
作者
Bhangale, S. V. [1 ]
Kumar, Rajesh [2 ]
Bhangale, Kajal [3 ]
机构
[1] Govt Polytech, Dept Elect Engn, Pune, Maharashtra, India
[2] Malaviya Natl Inst Technol, Dept Elect Engn, Jaipur, Rajasthan, India
[3] Pune Vidyarthi Grihas COET, Dept Elect Engn, Pune, Maharashtra, India
关键词
Induction motor drive; 18-sector DTC; cutoff frequency; stator flux estimator; VECTOR CONTROL;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In direct torque control (DTC) scheme, stator flux vector, and electromagnetic torque are regulated by choosing a voltage vector from a switching logic table. However, the selected voltage vector is not always the perfect one because of only the sector is considered where the flux space vector lies without considering its precise position. Voltage vector selection depends on how precisely the flux is estimated. This paper describes a modified flux estimator scheme for DTC-based induction-motor drives. The flux estimated by the improved flux estimator is used to choose the stator voltage vector in an 18-sector (DTC) flux plane. The proposed control algorithm is comparatively simple and significantly reduces the torque ripple as compared with the basic DTC. Simulation and experimental results proposed algorithm shows the competency of estimator.
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页数:6
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