Journal of international Conference on Electrical Machines and Systems

Journal of International Conference on Electrical Machines and Systems (대한전기학회 분과)
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A Cascaded Multilevel Inverter Using Bidirectional H-bridge Modules

  • Kang, Feel-Soon (Dept. of Electronic and Control Engineering, Hanbat National University) ;
  • Joung, Yeun-Ho (Dept. of Electronic and Control Engineering, Hanbat National University)
  • Received : 2012.11.06
  • Accepted : 2012.11.23
  • Published : 2012.12.01
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Abstract

This paper presents a multilevel inverter configuration which is designed by insertion of a bidirectional switch between capacitive voltage sources and a conventional H-bridge module. The modified inverter can produce a better sinusoidal waveform by increasing the number of output voltage levels. By serial connection of two modified H-bridge modules, it is possible to produce 9 output voltage levels including zero. There are 24 basic switching patterns with the 9 output voltage levels. Among the patterns, we select the 2 most efficient switching patterns to get a lower switching loss and minimum dv/dt stress. We then analyze characteristics of Total Harmonic Distortion (THD) of the output voltage with variation of input voltage by computer-aided simulations and experiments.

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References

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