【摘要】 本文对正弦脉宽调制变频器的输出波形进行了谐波分析。在载波比较大的情况下,藉助计算机可以精确计算出高次谐波的幅值,并找出在高次谐波中最大幅值出现的规律,绘出在不同载波比时高次谐波对电动机的附加铜、铁损耗曲,从而找出最佳载波比。更多还原

【Abstract】 In the paper the harmonics of sinusoidal pulse width modulation for output inverter waveforms are analysed. In the case of grester carrier frequency ratios, we may get the amplitude of the high harmonies accurately by computer, and find out the maximum amplitude in laws of appearing. The curves of motor with additional cuprous loss and iron loss were drawn and then the optimum carrier frequency ratio can be got.更多还原