RECTIFICATION DEVICE AND PHOTOVOLTAIC GENERATION SYSTEM USING THE SAME

摘要

Provided is a rectification device including: a power supply circuit (5) which connects a first MOSFET (4) connected between an anode terminal (2) and a cathode terminal (3) in a manner such that the source electrode is on the anode terminal side and generates a control voltage (V1) from the application voltage between the two terminals; a first drive control circuit (6); and a detection circuit (7) for detecting the direction of the current between the two terminals.  The detection circuit (7) has a current limiting resistor (71) connected to the output of the power supply circuit (5) and a diode (72) having an anode connected to the current limiting resistor (71) and a cathode connected to the cathode terminal (3).  The detection circuit (7) detects the current direction in accordance with the anode potential (V2) of the diode (72).  The first drive control circuit (6) uses a control voltage (V1) to drive/control the first MOSFET (4) on the basis of the anode potential (V2).