Introduction was made to the method of sine pulse width modulation (SPWM) wave generated by table searching, which is based on area equivalence principle.
介绍了一种基于面积等效原理，采用查表法产生正弦脉宽调制(SPWM)波的方法。
According to the principles of numeration table, the author puts forward simple but practical methods of how to measure the mean values, virtual values and peak values of non sine waves.
根据数字万用表的测试原理，提出了用其测量非正弦波电压平均值、有效值及峰值的简单实用的方法。
According to the principles of numeration table, the author puts forward simple but practical methods of how to measure the mean values, virtual values and peak values of non sine waves.
根据数字万用表的测试原理，提出了用其测量非正弦波电压平均值、有效值及峰值的简单实用的方法。
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