摘要
本文对SVPWM输出电压谐波作了数值分析,研究了在全电压范围内谐波分布情况、数值大小以及随调制度M的变化趋势,并与SPWM进行对比。结果表明,SVPWM的谐波分量相对较多,在全电压范围内与同次的SPWM谐波分量在数值及变化特征方面均有不同。在相同载波比N条件下,当M<0.35时,SVPWM的电流畸变率THDi值较大;当调制度M≥0.35时,SVPWM的THDi值低于SPWM。搭建了TMS320F2812的DSP为控制核心的硬件实验平台,所得SVPWM谐波实测结果与计算值相吻合,为客观评估SVPWM技术性能及消除谐波提供了依据。
In this paper, the numerical analysis of SVPWM inverter harmonic effect is mainly introduced. The distribution of the harmonics in the full voltage range, the numerical size and the change trend of the modulation system M are discussed and compared with SPWM. The results show that SVPWM has a relatively large number of harmonic components, and in the full voltage range and the same SPWM harmonic components in the numerical and changing characteristics are different. Under the same carrier ratio N conditions, when M0.35, SVPWM current distortion rate THD value is larger, and the THD of SVPWM is lower than that of SPWM when M≥0.35. Set up the TMS320 F2812 DSP to control the core of the hardware experimental platform, the measured results of SVPWM harmonics are in agreement with the calculated values, which provides the basis for the objective evaluation of SVPWM technical performance and elimination of harmonic effects.
作者
陈招兵
王榕生
Chen Zhaobing;Wang Rongsheng(College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108)
出处
《电气技术》
2018年第3期60-64,69,共6页
Electrical Engineering
关键词
SVPWM
数值计算
谐波
调制度
全电压
SVPWM
numerical calculation
harmonic
modulation index
full voltage
