基于双重傅里叶级数的混沌SPWM频谱量化分析

发布时间：2018-01-06 04:38

本文关键词：基于双重傅里叶级数的混沌SPWM频谱量化分析　出处：《物理学报》2014年07期 　论文类型：期刊论文

【摘要】：混沌SPWM控制因其可以有效地降低变换器的电磁干扰而得到越来越多的关注,目前对于电磁干扰效果的分析主要以仿真和实验为主,缺乏一种量化的分析方法.本文利用双重傅里叶级数的方法,首先给出了多周期及准随机SPWM的频谱量化表达式,并且针对多周期SPWM进行了频谱计算与仿真的对比验证,然后本文将此计算方法拓展应用到混沌SPWM中,并分析了混沌频谱计算的可行性.为了验证不同映射及不同载波周期波动范围对频谱的影响,文中选择了常用的Tent和Chebyshev映射分别进行了对比实验,实验结果表明,载波周期波动范围对扩频效果具有较大的影响,而且从长期看,混沌序列的分布概率密度会影响扩频的效果,从短期来看,序列的初始值选取也会对扩频效果有较大影响.本文的频谱分析方法对混沌SPWM抑制电磁干扰原理提供了一定的理论基础,而且可以为其工程实践提供设计参考.
[Abstract]:Because of the chaotic SPWM control can effectively reduce electromagnetic interference of converter and gets more and more attention, the current analysis for electromagnetic interference effect mainly by simulation and experiment, the lack of a quantitative analysis method. By using the method of double Fu Liye series, first gives a multi cycle and quasi random SPWM spectrum quantification expression, and is verified by comparing the calculation and Simulation of frequency spectrum for multi period SPWM, then the calculation method is applied to chaos in SPWM, and analyzes the feasibility of chaotic spectrum calculation. In order to verify the effects of different mapping and different carrier fluctuation range of the spectrum, the commonly used Tent and Chebyshev mapping were compared, the experimental results show that the range of carrier cycle has a significant influence on the spreading effect, but in the long run, chaotic sequence The probability density distribution will affect the spreading effect, in the short term, the sequence of initial values will have great influence on the spreading effect. The spectrum analysis method of chaotic SPWM electromagnetic interference suppression principle provides a certain theoretical basis, but also can provide a design reference for the engineering practice.

【作者单位】：北京交通大学电气工程学院;华南理工大学电力学院;
【基金】：国家自然科学基金青年科学基金(批准号:51007004);国家自然科学基金重点项目(批准号:50937001) 中央高校基本科研业务费(批准号:2012JBM096) 北京高等学校青年英才计划项目(批准号:YETP0569) 北京市自然科学基金(批准号:3142015)资助的课题~~
【分类号】：TM46
【正文快照】： 1引言脉宽调制(PWM)技术是现代电力电子变换器应用最广的调制技术,它兼具调频、调压、动态响应速度快、消除低次谐波等优点[1].但是,PWM模式下,开关器件的高频动作所带来的高频谐波也越来越引起人们的关注,并且进行了大量的频谱计算来分析此模式下的谐波分布情况[2].为了满足P

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