| .死区对开环和闭环控制SPWM逆变器输出基波电压的影响比较[J].电气自动化,2011,(3): |
| 死区对开环和闭环控制SPWM逆变器输出基波电压的影响比较 |
| Influence Comparison of Dead-time for the Output Fundamental Voltage of Open-loop and Close-loop Controlled SPWM Inverter |
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| DOI： |
| 中文关键词: 死区效应 闭环控制 SPWM逆变器 |
| 英文关键词:dead-time effects close-loop control SPWM inverter |
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| 中文摘要: |
| 在SPWM逆变器中,为了防止同一桥臂的上下两个开关器件产生直通,必须将驱动信号注入若干微秒的死区时间,这会使逆变器输出电压产生谐波电压。通过对基于瞬时输出电压反馈控制的SPWM逆变器死区效应造成的谐波电压的分析,建立了考虑死区效应时的SPWM逆变器控制模型,研究了逆变桥臂控制信号死区时间对开环与闭环控制SPWM逆变器输出基波电压的影响。分析结果表明,对于开环控制SPWM逆变器,随着死区时间增加,逆变器输出基波电压有效值降低,输出电压谐波含量显著增加;对于单电压闭环控制SPWM逆变器,死区时间对逆变器输出基波电压的影响与负载有关。仿真结果证明了理论分析的正确性。 |
| 英文摘要: |
| In SPWM inverter,a few microseconds dead-time must be inserted in the switching signals to prevent two switch derices at the same bridge arm directly to be conducted,which would cause additional harmonic voltage in the output voltage of inverter.Through the analysis on the additional harmonic voltage caused by the dead-time of SPWM inverter based on instantaneous output voltage feedback control,the close-loop control model with consideration of dead-time was established and the effects of dead-time on the f... |
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