基于120°坐标系的SVPWM算法研究

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摘要针对传统空间矢量脉宽调制(SVPWM)算法结构复杂及运算量大等问题,提出一种基于120° AB非正交坐标系的SVPWM算法。该算法首先打破直角坐标系的约束,选取互差120°的单位矢量为基,构建非正交坐标系,进而将空间矢量变换到该坐标系下,利用两个坐标分量进行扇区判断、作用时间运算以及产生PWM信号,实现了SVPWM算法。通过仿真和实验,验证了该SVPWM算法的正确性,并在数字控制器的算法实现上与传统算法进行对比,得出该算法具有结构简单、运算快速以及控制精确等优势。

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	孙鹤旭
	荆锴
	董砚
	郑易

关键词 ：空间矢量, 非正交坐标系, 脉宽调制, 扇区

Abstract：A new space vector pulse width modulation (SVPWM) algorithm based on 120° AB non-orthogonal coordinates is put forward in order to avoid the problems of structure complexity and large computation of the traditional algorithm.The constraint of Cartesian coordinates system is broken and two unit vectors with 120° angle are used as the bases to compose the novel non-orthogonal coordinates.Then,each space vector can be transformed into this coordinates.Through the judgment and operation of both coordinate components,the sectors judgment,action time calculation,and PWM signal’s generation can be accomplished to implement the SVPWM algorithm.At last,simulations and experiments verify the correctness of the proposed algorithm.By comparing with the traditional algorithm in digital controllers,the simplicity,speediness,and exactness of the proposed SVPWM algorithm have been testified.

Key words： Space vector non-orthogonal coordinates system PWM sector

收稿日期: 2015-01-29 出版日期: 2016-03-16

PACS:

TM343

基金资助:河北省重大科技成果转化项目(13041709Z)、河北省自然科学基金(E2013202108)和河北省发改委项目(2013)资助。

通讯作者: 荆锴,男,1987年生,博士研究生,研究方向为电机系统及其控制。E-mail:jingkai_1082@126.com E-mail: hxsun@hebust.edu.cn

作者简介: 孙鹤旭男,1956年生,教授,博士生导师,研究方向为运动控制、工程系统与控制。

引用本文:

孙鹤旭，荆锴，董砚，郑易. 基于120°坐标系的SVPWM算法研究[J]. 电工技术学报, 2016, 31(5): 52-59. Sun Hexu,Jing Kai,Dong Yan,Zheng Yi. Research of SVPWM Algorithm Based on 120° Coordinates System. Transactions of China Electrotechnical Society, 2016, 31(5): 52-59.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I5/52

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