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基于逆算符方法的谐波注入式SPWM技术

, PP. 191-196

Keywords: 逆变器,自然采样SPWM,谐波注入式SPWM,逆算符方法

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Abstract:

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。

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