High‐speed switching of the power transistor in a DC‐DC converter with current feedback and core saturation

Koosuke Harada, Hiroshi Sakamoto, Masahito Shoyama

研究成果: ジャーナルへの寄稿記事

抄録

To reduce the size and weight of a switching dc‐dc converter, it is effective to increase its switching frequency. This requires the reduction of the switching time and switching loss. This paper introduces a dc‐dc converter with a short turn‐off time and a high efficiency at a switching frequency up to the order of megahertz. This is achieved by using a bipolar transistor with current feedback and core saturation. The turn‐off mechanism was analyzed by using an equivalent circuit. The turn‐off time was found to be considerably shortened by the quick discharge of the excess carrier in the base region. This is due to the formation of an LC circuit consisting of the saturated inductance of the current feedback transformer which magnetically saturates during the turn‐off period, and the base‐emitter capacitance of the switching transistor. This phenomenon can be used widely for high‐speed and high current switchings.

元の言語英語
ページ(範囲)60-68
ページ数9
ジャーナルElectronics and Communications in Japan (Part II: Electronics)
69
発行部数7
DOI
出版物ステータス出版済み - 1 1 1986

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converters
transistors
saturation
Feedback
Switching frequency
Bipolar transistors
LC circuits
Equivalent circuits
Inductance
Transistors
Capacitance
bipolar transistors
Power transistors
equivalent circuits
inductance
transformers
high current
Networks (circuits)
capacitance

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

これを引用

High‐speed switching of the power transistor in a DC‐DC converter with current feedback and core saturation. / Harada, Koosuke; Sakamoto, Hiroshi; Shoyama, Masahito.

:: Electronics and Communications in Japan (Part II: Electronics), 巻 69, 番号 7, 01.01.1986, p. 60-68.

研究成果: ジャーナルへの寄稿記事

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