Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (8): 27-33.doi: 10.3969/j.issn.1000-565X.2014.08.005

• Power & Electrical Engineering • Previous Articles     Next Articles

SVPWM Over-Modulation Algorithm Based on 60° Coordinate System

Tang Xiao Yang Xiang-yu Zhao Shi-wei Liu Yuan-jing   

  1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2014-02-27 Revised:2014-04-23 Online:2014-08-25 Published:2014-07-01
  • Contact: 杨向宇(1963-)，男，教授，博士生导师，主要从事电气传动系统及其智能控制，微特电机及其控制研究． E-mail:yangxyu@scut.edu.cn
  • About author:唐校(1981-)，男，博士生，主要从事永磁同步电机的驱动控制研究． E-mail:tang520xiao@foxmail．com
  • Supported by:

    国家自然科学基金资助项目( 51107041) ; 广东省自然科学基金资助项目( S2011040005498)

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Abstract:

When the traditional space vector pulse width modulation( SVPWM) is performed in the orthogonal coordinatesystem,the computational burden is more heavy and the corresponding over-modulation algorithm is morecomplex.For the purpose of facilitating the real-time operation,by analyzing the characteristics of SVPWM algorithmbased on a 60° coordinate system,this paper proposes a novel over-modulation algorithm which is easy to implementwith a small amount of computation.This algorithm can incorporate the whole modulation area of thereference voltage vector without calculating the maintain angle.In the six-step mode,this algorithm can choose thebasic voltage vector only according to the charging time of the basic voltage vector without over-modulation,whichneeds no calculation of the phase angle of the reference voltage.Theoretical analysis and experimental results showthat the proposed algorithm can save a lot of computing time.

Key words: voltage vector, 60°, coordinate system, space vector pulse width modulation, over-modulation

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