一种TSMC共模电压频谱的三重傅立叶变换分析方法  

A Triple Fourier Transform Analysis Method of TSMC Common Mode Voltage Spectrum

作　　者：苏建 耿强[1] SU Jian;GENG Qiang(School of Electrical and Electronic Engineering,Tian Gong University,Xiqing District,Tianjin 300387,China)

机构地区：[1]天津工业大学电气与电子工程学院,天津300387

出　　处：《新一代信息技术》2021年第6期17-29,共13页New Generation of Information Technology

基　　金：国家自然科学基金(项目编号:52077154)。

摘　　要：在电力电子与电力传动领域中,双级矩阵变换器(TSMC)在高精度的工业场合具有广泛的研究价值。当TSMC连接阻感负载时,共模电压与输入、输出和载波频率均相关,而传统的快速傅立叶变换(FFT)分析谐波时只考虑三种频率中的任意两种,并且当任意频率取非整数时会引起频谱的重合与丢失,导致得到共模电压谐波频谱不准确。针对这一现象,本文提出应用三重傅立叶变换计算传统双空间调制下共模电压谐波幅值的解析解,不仅全面考虑了相互独立的三种频率,而且避免了FFT分析方法的固有缺陷,得到了准确的频谱规律。最后通过仿真验证了所提方法的与准确性与优越性。In the field of power electronics and power transmission,the two-stage matrix converter(TSMC)has extensive research value in high-precision industrial occasions.When TSMC is connected to a resistive load,the common mode voltage is related to the input,output,and carrier frequencies.However,the traditional fast Fourier transform(FFT)only considers any two of the three frequencies when analyzing harmonics,and spectrum coincidence and loss will occur when any frequency is taken as a non-integer,resulting in inaccurate common-mode voltage harmonic spectrum.In response to this phenomenon,this paper proposes the applica-tion of triple Fourier transform to calculate the analytical solution of the common-mode voltage harmonic am-plitude under traditional double space modulation,which not only fully considers the three independent fre-quencies,but also avoids the inherent defects of the FFT analysis method,thus obtaining the accurate spectrum law.Finally,the accuracy and superiority of the proposed method are verified by simulation.

关 键 词：电力电子与电力传动 双级矩阵变换器 共模电压 三重傅立叶变换 

分 类 号：TM351[电气工程—电机]