基于AVR单片机的SPWM控制技术

作者：傅胜阳，陈辉明，王正仕 日期：2007-10-24/span> 浏览：4301 查看PDF文档

基于AVR单片机的SPWM控制技术

傅胜阳，陈辉明，王正仕
（浙江大学 电气工程学院，浙江 杭州 310027）

摘要：叙述了单相全桥电压型逆变器SPWM调制的原理，分析了单极性倍频调制的优点和采用的理由。在介绍了AVR单片机AT90PWM2的基础上，描述了用AT90PWM2实现单极性倍频SPWM调制的方法，制作了实际的逆变器样机，并应用于1 kW汽油发电机组中，工作性能稳定。最后给出了实验波形，实验结果表明,输出电压波形光滑、对称性好、失真度低。
关键词：逆变器;正弦脉宽调制;规则采样;单片机；谐波畸变率
中图分类号：TM46文献标识码：A文章编号：1001-4551(2007)09-0026-04

SPWM control based on AVR single chip micyoco
FU Shengyang, CHEN Huiming, WANG Zhengshi
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: The principle of SPWM modulation in singlephase full bridge voltage mode inverter was represented. The advantage of single polar freqnencydoubling modulation and the reason of adoption were analyzed. The method for relizing SPWM with single polar freqnencydoubling was describled, based on AVR 8bit SCM AT90PWM2. The prototype of inverter was made, which was applied in gasoline generation set with 1 kW. The inverter has stable function. Finally the experimental results were illustrated. The results show this method can achieve good output waveform, the output voltage waveform is smooth, symmetrical good, and scale distortion is low.
Key words: inverter; sine pulse width modulation(SPWM); single chip micyoco(SCM); total harmonic distortion(THD)

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