ELECTRIC POWER CONVERSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To efficiently cool each heating component and thereby downsize an electric power conversion system.SOLUTION: An electric power conversion system includes: a step-up reactor (620); a smoothing capacitor (500); a power circuit body (300); and heat radiation members (20, 680). A height of a heat radiation surface of the power circuit body (300) is larger than a thickness of the power circuit body (300). The heat radiation members include a first heat radiation member (680) disposed between the power circuit body (300) and the step-up reactor (620); and a second heat radiation member (20) connected with the first heat radiation member (680). The power circuit body (300) is disposed so that a surface perpendicular to a height direction of the heat radiation surface faces the first heat radiation member (680). The second heat radiation member (20) is formed along the height direction of the heat radiation surface. The capacitor module (500) is disposed facing the power circuit body (300) across the second heat radiation member (20).