北京航空航天大学学报 ›› 2013, Vol. 39 ›› Issue (3): 355-360.

• 论文 • 上一篇    下一篇

基于预设载波的随机开关频率调制方法

王亭岭1, 熊军华2, 张瑾3   

  1. 1. 华北水利水电学院 电力学院, 郑州 450011;
    2. 北京航空航天大学 机械工程及自动化学院, 北京 100191;
    3. 中国科学院 电工研究所, 北京 100190
  • 收稿日期:2012-02-23 出版日期:2013-03-31 发布日期:2013-04-03
  • 作者简介:王亭岭(1975-),男,内蒙古呼盟人,副教授,wangtl@ncwu.edu.cn.

Random PWM method based on pre-determined carrier frequencies

Wang Tingling1, Xiong Junhua2, Zhang Jin3   

  1. 1. College of Electrical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China;
    2. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    3. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2012-02-23 Online:2013-03-31 Published:2013-04-03

摘要: 现有的随机开关频率调制方法未考虑载波切换频率与载波频率间的关系,因此会使逆变器输出交流电产生一定的谐波畸变.为了克服这一不足,通过分析载波切换频率对随机载波信号的影响,得出预置载波随机切换时,前后两条载波的相位不匹配是造成逆变器输出电压产生畸变的根本原因,并提出采用随机切换预设载波的方法实现开关频率的随机化.仿真及实验结果表明,随机脉冲宽度调制(PWM,Pulse Width Modulation)方法不但可以有效抑制输出电压的高次谐波而且在波形正弦度方面优于常规随机PWM方法.

Abstract: For reported random frequency pulse width modulation(PWM) methods, harmonic distortion appears in the output waveform because the relationship between the carrier frequencies and their changing frequency is not carefully considered. To cope with the above obstacle, the effect of carrier changing frequency on the randomized carrier signals was investigated. A fact that phase mismatch of the two changing carrier signals induces the output voltage distortion was subsequently obtained. Then, a proposed approach was to select the switching frequency randomly among a few pre-determined carrier frequencies. Both simulation and experimental results verify that using the proposed PWM technique, the dominant harmonic clusters are effectively reduced while retaining good sinusoidal output waveforms, which are superior to that based on the conventional random PWM methods.

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发