POWER CONVERSION DEVICE AND POWER CONVERSION SYSTEM

To provide a power conversion device capable of increasing detection accuracy.SOLUTION: A power conversion device according to an embodiment comprises an input power terminal, an output power terminal, a power conversion circuit including a sensor which can covert power supplied via the input power terminal, output the converted power via the output power terminal, and generate a first detection signal according to an output voltage or an output current, a signal generation circuit which can generate a second detection signal according to the first detection signal, and a control circuit. The signal generation circuit comprises a correction unit which can perform correction processing for the first detection signal, a photocoupler including a light-emitting element which can emit light with luminance according to the first detection signal having been subjected to correction processing and a light-receiving element which can receive light emitted from the light-emitting element and generate a light-receiving signal according the amount of light received, and an output unit which can output a second detection signal according to the light-receiving signal. The correction unit can perform correction processing according to a current transmission rate of the photocoupler.SELECTED DRAWING: Figure 2 【課題】検出精度を高めることができる電力変換装置を得る。【解決手段】本発明の一実施の形態に係る電力変換装置は、入力電力端子と、出力電力端子と、入力電力端子を介して供給された電力を変換可能であり、変換された電力を出力電力端子を介して出力可能であり、出力電圧または出力電流に応じた第１の検出信号を生成可能なセンサを有する電力変換回路と、第１の検出信号に応じた第２の検出信号を生成可能な信号生成回路と、制御回路とを備える。上記信号生成回路は、第１の検出信号に対して補正処理を行うことが可能な補正部と、補正処理が行われた第１の検出信号に応じた輝度で発光可能な発光素子と、発光素子が発した光を受光し、受光量に応じた受光信号を生成可能な受光素子とを有するフォトカプラと、受光信号に応じた第２の検出信号を出力可能な出力部とを有する。補正部は、フォトカプラの電流伝達率に応じた補正処理を行うことが可能である。【選択図】図２