The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A New Multilevel Inverter of H-bridge Topology using Bidirection Switch

양방향 스위치를 이용한 H-bridge 구조의 새로운 멀티레벨 인버터

  • Lee, Sang-Hyeok (Dept. of Electrical Engineering, Chonnam Nat'l Univ.) ;
  • Kang, Seong-Gu (Dept. of Electrical Engineering, Chonnam Nat'l Univ.) ;
  • Lee, Tae-Won (Power Advanced Development, Samsung Electro-Mechanics) ;
  • Hur, Min-Ho (Power Advanced Development, Samsung Electro-Mechanics) ;
  • Park, Sung-Jun (Dept. of Electrical Engineering, Chonnam Nat'l Univ.)
  • Received : 2012.03.21
  • Accepted : 2012.04.10
  • Published : 2012.08.20
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Abstract

Recently, Switching devices become cheaper, depending on the multi-level inverters are considered as the power-conversion systems for high-power and power-quality demanding applications. The multi-level inverters can reduce the THD(Total Harmonic Distortion) as the output which is similar sinusoidal waveform by synthesizing several capacitor DC voltages. However it has some disadvantages such as increased number of components, complex PWM control method. Therefore, this paper is proposed the new multi-level inverter topology using an new H-bridge output stage with a bidirectional auxiliary switch. The proposed topology is the 4-level 3-phase PWM inverter with less switching part than conventional multi-level inverters and reactive power control possible. In order to understand the new multi-level inverter, topology analysis and switching patterns and modes according to the current loop are described in this paper. The proposed multi-level inverter topology is validated through PSIM simulation and the experimental results are provided from a prototype.

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References

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