Electric power converter

An electric power converter, comprising:

• a cooler, which includes a passage through which a cooling medium flows;
• and
• at least two heat generating bodies, which are dispersedly arranged on upper and lower surfaces of the cooler to be cooled by the cooler,
• wherein the passage from a cooling medium inlet to a cooling medium outlet of the cooler includes:
• an upstream cooling portion and a downstream cooling portion which cools the at least two heat generating bodies;
• an upstream distribution portion located on a cooling medium inlet side;
• a downstream distribution portion located on a cooling medium outlet side;
• connecting portions which are disposed proximate respective side surfaces of the cooler and connect the upstream cooling portion and the downstream cooling portion;
• and
• a partition portion which partitions the upstream cooling portion and the downstream cooling portion, and the upstream distribution portion and the downstream distribution portion, and
• wherein the passage is connected so that the cooling medium flows in order of the upstream distribution portion, the upstream cooling portion, the connecting portion, the downstream cooling portion, and the downstream distribution portion,
• the cooling medium splits into two flows from the upstream distribution portion, in respective opposing directions toward each of the respective side surfaces, to form the upstream cooling portion proximate the upper surface,
• each of the two flows enters a corresponding connecting portion and a corresponding downstream cooling portion, and
• the two flows join each other onto the downstream distribution portion proximate the lower surface.