利用mathcad编写的特定谐波消去法的仿真程序，并且可以给出shepwm图形-To mathcad written in a specific harmonic elimination method simulation program, and can give shepwm graphics

矩形窗 海宁窗等三种加窗FFT在电力谐波检测中的应用，非常实用简单-Hamming window rectangular window, three windowing FFT Applications in Power Harmonic Detection, very practical and simple