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| 摘要: |
| 探讨了几种现有的多电平逆变器的脉冲宽度调制PWM(Pulse Width Modulation)方法，提出了一种多电平最优空间矢量方法，该方法通过选取最优空间矢量确定三相最佳电平组合，得到三相电压实际电平值，从而生成三相PWM控制模式。并与现有的PWM方法进行了比较。仿真结果说明多电平最优空间矢量方法具有开关频率低、总谐波含量低的优点。 |
| 关键词: 多电平逆变器 逆变单元串联 PWM 最优空间矢量方法 |
| DOI： |
| 分类号:TM464 |
| 基金项目:国家科技攻关引导项目资助(2002BA219C)~~ |
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| Comparative study of PWM techniques for cascaded multilevel inverters |
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BO Bao-zhong LIU Wei-guo LUO Bing
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| Abstract: |
| Current PWM ( Pulse Width Modulation ) techniques for multilevel inverters have been in-vestigated.A multilevel optimal space vector technique is introduced ,in which the optimal com-bination of three phase levels is determined by selecting the optimal space vector to generate the control mode of3-phase PWM.It is compared with the current PWM techniques and the simu-lation results show that the lower switching frequency and line voltage THD ( Total Harmonic Distortion) can be achieved. |
| Key words: multilevel inverter,cascaded inverters,pulse width modulation,optimal space vector technique, |
