直流電源装置

Dc power supply unit

Abstract

PROBLEM TO BE SOLVED: To reduce ripples of an output current, and balance current passing through a plurality of series resonance switching power sources using a simple structure, when the plurality of series resonance switching power sources are connected in parallel. SOLUTION: Respective series resonance switching power sources PU1-PU3 forming a DC power supply unit are connected in parallel, and reactors L12, L22, L32 for balancing current connected in parallel with the primary windings N11, N21, N31 of respective transformers T are coupled electromagnetically to switch the respective DC resonance switching power source PU1-PU3, so as to provide phase difference at equal intervals respectively. A s a result, the ripples of the output current of the DC power supply unit, and balance the current in the respective switching power sources are reduced, thereby miniaturizing the DC power supply unit. By providing a detection winding for the reactor, whether any of the power sources is in failure is detected.
(57)【要約】 【課題】 複数の直列共振型スイッチング電源を並列に 接続した直流電源装置において、出力電流のリップルを 減少し、かつ複数の直列共振型スイッチング電源に流れ る電流を簡単な構成でバランスさせる。 【解決手段】 直流電源装置を構成している各直列共振 型スイッチング電源PU1〜PU3を並列接続し、かつ 互いのトランスTの一次巻線(N 11 、N 21 、 N 31 )に並列接続された電流バランス用のリアクトル (L 12 、L 22 、L 3 2 )を電磁結合し、各直列共振 型スイッチング電源PU1〜PU3を、互いに等間隔の 位相差をもってスイッチング動作させる。これにより、 直流電源装置の出力電流にリップルが少なく、各スイッ チング電源の電流をバランスさせて、直流電源装置を小 型化する。また、リアクトルに検出巻線を設けることに よって、いずれかの電源が故障しているかを検知する。

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