新方式ハーフブリッジソフトスイッチングPWM高周波インバータを用いた溶接機用DC-DCコンバータの開発

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  • 土井 敏光
    株式会社ダイヘン 溶接機事業部 第一技術部 パワーエレクトロニクス学会
  • 森本 慶樹
    株式会社ダイヘン 溶接機事業部 パワーエレクトロニクス学会
  • 真鍋 陽彦
    株式会社ダイヘン 溶接機事業部 第一技術部 パワーエレクトロニクス学会
  • 三島 智和
    呉工業高等専門学校 パワーエレクトロニクス学会
  • 中岡 睦雄
    Electric Energy Saving Resarch Center, Kyungnam University College of Industrial Technology パワーエレクトロニクス学会

書誌事項

タイトル別名
  • Latest Development of A Novel Half Bridge Soft Switching PWM Inverter-Fed DC-DC Converter for Arc Welding Machines
  • シンホウシキ ハーフ ブリッジ ソフト スイッチング PWM コウシュウハ インバータ オ モチイタ ヨウセツキヨウ DC DC コンバータ ノ カイハツ

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説明

This paper presents a new DC-DC converter circuit topology using voltage source-fed soft-switching PWM high frequency inverter with half-bridge configuration. This type of DC-DC converter circuit has two semiconductor switching devices in series with high and low DC buslines, two lossless snubbing capacitors in parallel with two connected additional diode components. Under the newly proposed high frequency soft-switching PWM inverter link DC-DC converter circuit connected for utility ac 400V-rms input grid on the basis of divided smoothing capacitor type half bridge inverter. Its active power switches (IGBTs) can achieve ZCS turn-on commutation operation and ZVS turn-off commutation operation. Consequently, the total turn-off switching power losses of IGBTs can be significantly reduced for higher frequency. As a result, a high switching frequency operation for IGBTs used in this circuit can be actually implemented at a switching frequency more than about 20kHz. It is proved that the more the switching frequency of half bridge inverter increases, the more soft switching PWM DC-DC converters with a high frequency transformer have remarkable advantages for its power conversion efficiency and power density as compared with the conventional full-bridge type soft switching PWM DC-DC converter with DC rail side auxiliary edge resonant sunbbers that the authors have proposed previously. The practical effectiveness of these new converter topologies are substantially confirmed for low voltage and large current dc power supplies as high performance arc welding machine from a practical point of view.

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