基于逆算符方法的谐波注入式SPWM技术  

The Harmonics-Injection SPWM Technique Based on the Inverse Operator Method

作　　者：郑春芳[1,2] 张波[2] 丘东元[2] 余向民[2] 

机构地区：[1]广东机电职业技术学院,广州510515 [2]华南理工大学电力学院,广州510640

出　　处：《电工技术学报》2012年第11期191-196,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(50937001)

摘　　要：由于描述谐波注入式SPWM(简称HISPWM)的数学模型是超越方程,采用常规数值解法求解需要花费较长时间,不适用于数字化实时控制。本文以注入3次谐波的SPWM为例,利用逆算符法求出它们相应的解析表达式,并给出了在不同载波比下3次谐波注入式SPWM开关点解析表达式的精度分析实例。结果表明,3次谐波注入式SPWM开关点解析表达式是由无穷项Adomian多项式表示,可以根据需要的计算精度要求选择合适的Adomian多项式项数求解3次谐波注入式SPWM的开关时刻,为谐波注入式SPWM更有效的实际应用提供了理论依据。It is difficult to apply natural-sampled harmonic-injection SPWM （HISPWM） method in digital real-time control because its switch-points are expressed in transcendental equations. This paper tries to deduce the analytical expression of the third harmonic injection SPWM＇s switch- points by inverse operator method, and gives the precision analysis examples for the analytical solutions of natural-sampled HISPWM＇s switchpoints at different carrier ratio.,The results show the switch-points can be expressed in a series of adomian polynomials. The precision of HISPWM switch-points is depended on how many adomian polynomial terms are used in the calculation, which provide theoretical basis for the application of HISPWM efficiently in practice.

关 键 词：逆变器 自然采样SPWM 谐波注入式SPWM 逆算符方法 

分 类 号：TM464[电气工程—电器]