POWER CONVERSION DEVICE

To provide a power conversion device capable of suppressing excessive current in precharge without using a current detector.SOLUTION: A power conversion device 100 comprises: a power converter 10 that has a rectification circuit 11, converts an AC input current inputted from an AC power supply into...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HANDA YUICHI, SHIRAKAWA KAZUHIRO, KOKETSU KAORU
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a power conversion device capable of suppressing excessive current in precharge without using a current detector.SOLUTION: A power conversion device 100 comprises: a power converter 10 that has a rectification circuit 11, converts an AC input current inputted from an AC power supply into a DC current by the rectification circuit, and outputs the DC current through a pair of DC terminals; a smoothing capacitor 20 connected between the pair of DC terminals TD1 and TD2; a switch 30 that switches between a power supply state where power is supplied from the AC power supply to the smoothing capacitor 20 and a power cutoff state; a first voltage detector 41 that detects the input voltage inputted from the AC power supply; a second voltage detector that detects a capacitor voltage that is an inter-electrode voltage of the smoothing capacitor 20; and a controller 40 that controls the switch on the basis of a voltage difference parameter that is any one of a voltage difference between an absolute value of the detected input voltage and the smoothing capacitor voltage, and a correlation value thereof.SELECTED DRAWING: Figure 1 【課題】電流検出部を用いずにプリチャージにおける過大な電流を抑制できる電力変換装置を提供する。【解決手段】電力変換装置100は、整流回路11を有し、交流電源から入力された交流の入力電流を整流回路により直流電流に変換して一対の直流端子から出力する電力変換部10と、一対の直流端子TD1、TD2間に接続される平滑コンデンサ20と、交流電源から平滑コンデンサ20への電力供給状態と電力遮断状態とを切り替えるスイッチ30と、交流電源から入力された入力電圧を検出する第1電圧検出部41と、平滑コンデンサ20の電極間電圧であるコンデンサ電圧を検出する第2電圧検出部と、検出された入力電圧の絶対値と平滑コンデンサ電圧との電圧差又はその相関値のいずれかである電圧差パラメータに基づいてスイッチを制御する制御部40と、を備える。【選択図】図1