| 引用本文: | 伍家驹,王文婷,李学勇,杉本英彦.单相SPWM逆变桥输出电压的谐波分析[J].电力自动化设备,2008,(4):45-49 |
| .Output voltage harmonics analysis of single-phase SPWM inverter bridge[J].Electric Power Automation Equipment,2008,(4):45-49 |
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| 摘要: |
| 考虑逆变系统中死区及续流对输出电压的影响,利用双重傅里叶变换对单相全桥倍频三电平正弦脉宽调制(SPWM)逆变桥的输出电压进行了分析,定量地描述了其谐波分量,推导出无死区、有死区(补偿前后)的输出电压频谱公式,利用数据可视化技术描述了0～60kHz的谐波分布图。为了验证理论分析的准确性,利用Matlab7.01/Simulink建立模型进行仿真研究,并在逆变器样机上进行了实验,仿真与实验均验证了数学分析的正确性。研究结果表明,只有经充分补偿后,逆变桥输出电压的低次谐波才能得到有效抑制。 |
| 关键词: 逆变器,傅里叶变换,谐波,死区,频谱 |
| DOI： |
| 分类号:TM464 |
| 基金项目:国家自然科学基金 |
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| Output voltage harmonics analysis of single-phase SPWM inverter bridge |
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WU Jiaju WANG Wenting LI Xueyong Hidehiko SUGIMOTO
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| Abstract: |
| With the consideration of dead - time and flywheel diodes,the output voltage of single - phase double - frequency three - level SPWM (Sinusoidal Pulse Width Modulation) inverter bridge is analyzed using double Fourier transform. Its harmonic components are described quantitatively and its spectrum formulas are derived for three conditions:zero dead - time,nonzero dead - time without compensation and nonzero dead - time with compensation. Their harmonic distribution diagrams from 0 to 60 kHz are presented using digital visual technique. Its math model is built and simulated with Matlab7.01 / Simulink and experiments are carried out with prototype to verify the validity of theoretic analysis. Research results show that,only with the complete compensation,can the low - frequency harmonics of output voltage be effectively suppressed. |
| Key words: inverter,Fourier transform,harmonic,dead - time,spectrum |
