摘要
为了提高直流电压利用率,减少谐波,在三相逆变器中采用电压空间矢量调制技术取代SPWM技术,合理放置零矢量,选择恰当的开关频率,降低开关损耗。采用双重傅里叶变换对输出谐波进行了定量分析,在Matlab环境下对空间电压矢量调制和SPWM进行频谱对比分析,结果表明,电压空间矢量调制下直流电压利用率提高了15%,谐波含量减小,谐波幅值也大大降低。
To improve the efficiency of DC voltage and reduce harmonics,In the three-phase inverter space vector PWM technique is used to replace SPWM technique.Placing the rational zero vector and choosing the appropriate switching frequency are to reduce switching losses.The output harmonic is quantitatively analyzed by double Fourier transform.In the Matlab environment,the spectrum is comparatively analyzed by the space vector PWM and SPWM.The results show that the efficiency of DC voltage is increased by 15%,harmonic content and harmonic amplitude is greatly reduced by the space vector PWM.
出处
《电气技术》
2010年第12期6-9,共4页
Electrical Engineering
关键词
SVPWM
谐波分析
傅里叶变换
space vector PWM
harmonics analysis
fourier transform
