【摘要】 本文简述了交流变频调速系统常用的四种ＳＰＷＭ波形生成的方法，并研究了各种方法的ＳＰＷＭ开关点计算公式及其推导，利用这些公式计算了一系列开关点数据，同时提出了一种以开关点数据分析ＳＰＷＭ波形各次谐波的方法，通过谐波分析证实自然采样法优于其他方法。更多还原

【Abstract】 Describes the four ways producting SPWM wave which are often used in VVVF system and studies the calcutating formulas for various SPWM on/off switch points and their deduction. By using these formulas,we have calculated a series of on/off switch points data and presented 4 new way of analyzing different normonics of SPWM wave with these data. The results of harmoniC analysis proved that natural sampling is better than other methods.更多还原