A power conversion device configured to convert an output of an AC generator into a desired DC power and supply the desired DC power to a first load and a second load, the power conversion device comprising: a first rectifier circuit (111+112) connected in series to the first load, the first rectifier circuit (111+112) including at least one pair of diodes (111a+112a), an output portion of the AC generator being connected between each pair of diodes, the first rectifier circuit (111+112) being configured to rectify the output of the AC generator and supply the rectified output to the first load; an output voltage control circuit connected in parallel to the first rectifier (111+112); and a second rectifier circuit (113+114) connected in series to the second load, characterized in that the second rectifier circuit (113+114) including at least one pair of thyristors (113a+114a), anodes of each pair of thyristors being connected in series to each other, the output portion of the AC generator being connected between each pair of thyristors (113+114), one of each pair of thyristors being configured to, by entering a conductive state, rectify the output of the AC generator and supply the rectified output to the second load, and an other one of each pair of thyristors being configured to, by entering a conductive state, supply the output of the AC generator in a direction reverse to a direction from a cathode of the one of each pair of thyristors toward the second load; and that the output voltage control circuit being configured to control the other one of each pair of thyristors so that an output voltage (Vout1) of the first rectifier circuit (111+112) becomes a desired voltage, wherein as a result of that the output voltage (Vout1) of the first rectifier circuit (111+112) becomes the desired voltage, an output voltage (Vout2) of the second rectifier circuit (113+114) also becomes a desired voltage. a first rectifier circuit (111+112) connected in series to the first load, the first rectifier circuit (111+112) including at least one pair of diodes (111a+112a), an output portion of the AC generator being connected between each pair of diodes, the first rectifier circuit (111+112) being configured to rectify the output of the AC generator and supply the rectified output to the first load; an output voltage control circuit connected in parallel to the first rectifier (111+112); and a second rectifier circuit (113+114) connected in series to the second load, characterized in that the second rectifier circuit (113+114) including at least one pair of thyristors (113a+114a), anodes of each pair of thyristors being connected in series to each other, the output portion of the AC generator being connected between each pair of thyristors (113+114), one of each pair of thyristors being configured to, by entering a conductive state, rectify the output of the AC generator and supply the rectified output to the second load, and an other one of each pair of thyristors being configured to, by entering a conductive state, supply the output of the AC generator in a direction reverse to a direction from a cathode of the one of each pair of thyristors toward the second load; and that the output voltage control circuit being configured to control the other one of each pair of thyristors so that an output voltage (Vout1) of the first rectifier circuit (111+112) becomes a desired voltage, wherein as a result of that the output voltage (Vout1) of the first rectifier circuit (111+112) becomes the desired voltage, an output voltage (Vout2) of the second rectifier circuit (113+114) also becomes a desired voltage.