摘要
讨论了SPWM逆变器的谐波分析方法,导出了采用规则采样法的SPWM逆变器的谐波计算公式,利用计算机辅助分析研究了谐波的频谱分布规律及频比和调制度对谐波的影响等。定量分析结果显示,SPWM逆变器在频比及其整数倍处形成谐波边带,远离频比及其整数倍的低次谐波数值接近为零,而与之同次数和附近的谐波幅值却很大。应根据所研究结果来确定频比,以使可忽略的低次谐波范围满足要求。
The harmonic analysis method for SPWM inverters is discussed and the computation formulas are derived with uniform sampling teehnique. The distribution rule of harmonic spectrum and the effect of frequency ratio and the modulation index on harmonics are studied by computer-aided analysis. Quantitative researeh shows that harmonic sidebandsare formed at frequency ratio and its integral multiplication, the lower order barmonies can be ignored while the higher ones become very large near the frequency ratio and its integral multiplication, The frequency ratio should be chosen under the consideration of the above mentioned results so as to expand the range of the ignored lower order harmonics,
出处
《西安矿业学院学报》
北大核心
1993年第2期179-185,共7页
Journal of Xi'an University of Science & Technology
