• Title/Summary/Keyword: new switching angel technique

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The Study on the HBML Inverter Using the Cascaded Transformers (변압기 직렬구성을 이용한 HBML 인버터에 관한 연구)

  • 박성준;박노식;강필순;김광헌;임영철;김철우
    • The Transactions of the Korean Institute of Power Electronics
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    • v.9 no.4
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    • pp.334-340
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    • 2004
  • In this paper, an efficient switching pattern to equalize the size of transformer is proposed for a multi-level inverter employing cascaded transformers. It is based on the prior selected harmonic elimination PWM(SHEPWM) method. Because the maximum magnetic flux imposed on each transformer becomes exactly equal each to each, all transformers can be designed with the same size regardless of their position. Therefore, identical full-bridge inverter units can be utilized, thus improving modularity and manufacturability. The fundamental idea of the proposed switching pattern is illustrated and then analyzed theoretically. The validity of the proposed switching strategy is verified by experimental results.