基于等面积法生成 SPWM 波形的算法的讨论摘要：SPWM 波广泛应用于电力电子行业以及电动机调速和阀门控制。本文提出一种改进后的等面积法产生 SPWM 波形，它具有精度高，计算简单，误差小等特点，明显优于自然采样法和规则采样法。该系统采纳三项逆变桥采纳双极性控制，PWM 驱动波形由 89C52 单片机查表发生成,IGBT 的驱动电路采纳 IR2101 芯片。对其输出波形进行分析，证明了该方法的可行性和合理性。经 PROTUES 仿真系统性能基本达到了设计要求。关键词:SPWM 等面积法 三项逆变桥 89C52 IR2101 PROTUESThe study of generating SPWM wave algorithm that based on area equivalent principleAbstract: SPWM wave is widely used in the power electronics industry ,the Motor speed control and the Valve control.This study propoes a improved method of generating SPWM wave using the area equivalent principle.This method is high accuracy,easy to calculate and has low deviation.It is obviously better than natural sampled one or regular sampled one.This system use Three inverter bridge with bipolar control,PWM wave is generated by 89C51(SCM) using lookup method.The drive circuit of IGBT adopt IR2101 chip.It is proved that this method is feasible and reasonable after making harmonic analysis of its output waveform.The simulation reasults from PROTUES shows the system`s requirements are reached.Keyword:SWPM,area equivalent principle, Three inverter bridge,89C51,IR2101,PROTUES目 录1 绪论..............................................................11.1 课题背景及讨论意义..............................................51.2 PWM 波形算法和应用的进展现状....................................51.2.1 现有主要的 PWM 算法............................................51.2.2 PWM 应用的背景及现状..........................................71.3 课题的主要讨论内容..............................................92 正弦脉宽调制（Sinusoida PWM）技术................................102.1 等面积法的介绍.....
