Abstract: A power converter including a cooler having a cooling flow path in which a refrigerant flows, a base plate to which switching elements are attached, a control circuit board on which power-generating elements are attached, and securing pins that secure the base plate onto the lower cooler wall of the cooler and support the control circuit board so as to be spaced apart from the base plate. Upper end parts of the securing pins pass through the base plate and the cooler lower wall, reaching inside the cooling flow path. First pass-through parts of the securing pins for the lower cooler wall are fitted by pressure into the lower cooler wall . Support column parts of the securing pins extend in a direction opposite the lower cooler wall, and the control circuit board is secured to lower flanges thereof.

Abstract: A power converter (100) comprises a cooler (20) having a cooling flow path (21) in which a refrigerant flows, a base plate (31) to which switching elements (32) are attached, a control circuit board (33) on which power-generating elements (34) are attached, and securing pins (40) that secure the base plate (31) onto the lower cooler wall (22) of the cooler (20) and support the control circuit board (33) so as to be spaced apart from the base plate (31). Upper end parts (41) of the securing pins (40) pass through the base plate (31) and the cooler lower wall (22), reaching inside the cooling flow path (21). First pass-through parts (42) of the securing pins for the lower cooler wall (22) are fitted by pressure into the lower cooler wall (22). Support column parts (46) of the securing pins (40) extend in a direction opposite the lower cooler wall (22), and the control circuit board (33) is secured to lower flanges (47) thereof. Thus, power converter can be reduced in size with a simple constitution.