本文以电工学正弦理论为基础；以经典的自然采样法为依托；以电子变流技术为研究对象，全面阐述了SPWM波的基本特征与个性，旨在为实验及测试提供规范的参照基准并回归于应用数学。-In this paper, the theory of Sine electrotechnics foundation to classic based on natural sampling electronic converter technology as the research object, comprehe