A Forward Converter Reducing Current Harmonics in Power System.

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  • 電力系統の電流高調波を低減するフォワードコンバータの提案
  • デンリョク ケイトウ ノ デンリュウ コウチョウハ オ テイゲンスル フォワー

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Abstract

For the rectifier circuits with small capacity such as for consumer electronics and appliances, the capacitor input type rectifier circuits are generally used. The various switching regulators with such capacitor input rectifier have become more and more used, typically such as for the television set. Consequently, various harmonics much generate in the power system, so hereafter harmonic problems will become more serious. On such background, in this paper, by means of the reduced input capacitance, the authors propose some techniques to improve the current harmonic characteristics in the input power supply for the conventional forward converter type switching regulator.<br>Secondly, we discuss the harmonic cancellation characteristics by the parallel connection of the conventional converter and the proposed one. For such parallel connection, the current harmonics in the power system, especially the lower order harmonics such as the fifth or seventh, can be largely reduced by means of the cancellation of harmonics due to the phase difference of the harmonics between conventional converter and the proposed one.

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