【摘要】 本文给出了各种规则采样的正弦PWM逆变器输出电压波形的数学描述,得出不同采样条件下相应电压波形的付里叶分解式。较严格的数学推导过程,为理论上对逆变器输出的谐波成分计算分析提供了依据。原则上这种分析方法可用于其它调制波形时PWM逆变器的分析,只要该调制波可用有限项正弦级数表示。本文最后还给出一个PWM逆变器输出电压波实测频谱,它显示了与理论分析相一致的结论.更多还原

【Abstract】 The paper presents mathematical descriptions for the voltage waveforms of the PWM inverter which uses various regular sampled switching patterns. The expressions of the Fourior series corresponding to these waves were derived and it is possible to analyse the harmonic contents of PWM inverter output in theory. This approach can also be applied to the PWM technique employing the modulating wave provided that it can be expressed by a finite sinusoidal series. The experimental result shows good agreement with the analysis.更多还原