基于DSP产生的SPWM波的谐波估计与分析  

Estimation and analysis of harmonics for generating SPWM based on DSP

作　　者：季伟[1] 林卫星[1] 黄伟锋[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《计算机工程与应用》2013年第9期211-217,共7页Computer Engineering and Applications

基　　金：浙江省教育厅重点项目(No.Z201017236);浙江省重点科技创新团队项目(No.2010R50004);浙江省科技厅钱江人才计划(No.2011R10074);浙江省公益性技术应用研究计划项目(No.2011C21077);宁波市自然科学基金(No.2012A610005)

摘　　要：针对2000系列DSP产生的正弦脉宽调制(Sinusoidal Pulse Width Modulation,SPWM)波,使用傅里叶级数模型,提出了将改进的粒子群优化(Improved Particle Swarm Optimization,IPSO)用于各次谐波的幅值和相位的参数估计方法,着重分析了在不同的调制波频率和电压下,载波比与谐波总畸变率(Total Harmonic Distortion,THD)之间的关系,通过大量的实验,得到在一定范围的调制波频率和电压下,均能保持高次谐波较小,从而得到高质量的正弦输出。这一结论不仅对SPWM的产生起指导作用,而且对要求正弦交流电的用电设备有着降低高频损耗与节能的重要实际意义。In this paper, generating Sinusoidal Pulse Width Modulation（SPWM） wave based on Digital Signal Processor（DSP） of 2000 series, using the Fourier series model, this paper presents a method of estimating the parameters of amplitude and phase of harmonics according to an Improved Particle Swarm Optimization （IPSO）. It discusses the relationship between carrier ratio and Total Harmonic Distortion（THD） based on difference of frequency and voltage of modulation wave. Through a large number of experiments, higher harmonic is made smaller in the case of frequency and voltage of modulation wave within a certain range, hence, it makes the sinusoidal output high quality. This conclusion gives the direction how to generate SPWM wave, also plays practical significance in the electrical equipments of sinusoidal alternating current which are required to reduce high-frequency loss and energy conservation.

关 键 词：正弦脉宽调制(SPWM) 谐波分析 数字信号处理器(DSP) 载波比 粒子群优化 

分 类 号：TM464[电气工程—电器]