RECTIFIER CIRCUIT

To reduce power loss caused by forward voltage of diode in a bridgeless converter.SOLUTION: A rectifier circuit 1 with a full-bridge circuit 10 comprises: a polarity detection part 4 for detecting polarity of AC voltage for an AC power supply; an input current detection part 5 for detecting input cu...

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1. Verfasser:	YAMAGUCHI TOMA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	To reduce power loss caused by forward voltage of diode in a bridgeless converter.SOLUTION: A rectifier circuit 1 with a full-bridge circuit 10 comprises: a polarity detection part 4 for detecting polarity of AC voltage for an AC power supply; an input current detection part 5 for detecting input current of the AC power supply; a control part 20 which the detected input current is input to and performs on-off control for MOSFETs. While the input current exceeds a predefined current threshold, the control part 20 keeps each of the MOSFETs equipped with a parasitic diode to which the input current flows at ON state.SELECTED DRAWING: Figure 1 【課題】ブリッジレスコンバータにおいてダイオードの順方向電圧による電力損失を低減させる。【解決手段】フルブリッジ回路１０を備えた整流回路１において、交流電源の交流電圧の極性を検出する極性検出部４と、交流電源の入力電流を検出する入力電流検出部５と、検出された交流電圧の極性、及び検出された入力電流が入力され、各ＭＯＳＦＥＴをオンオフ制御する制御部２０とを備える。そして制御部２０は、入力電流が予め定めた電流閾値を超えている間、入力電流が流れる各寄生ダイオードを有する各ＭＯＳＦＥＴをオンにする。【選択図】図１