Patent Number: 8,879,259

Title: Cooling system for onboard electrical power converter, and electrical power converter for railway vehicle

Abstract: A cooling system for an onboard electrical power converter in which a heat dissipation surface extends parallel to a flow of cooling air draft includes: a coolant tank containing coolant that includes a bottom surface being in thermal contact with the heat dissipation surface; a first conduit provided connecting to an upper surface of the coolant tank, the coolant flowing into the first conduit; a heat exchanger that comprises second conduits arranged with opposing the upper surface, and conducts the coolant to upstream; and a return unit that returns the coolant to the coolant tank; wherein the heat exchanger comprises heat dissipation fins through which the cooling air draft passes from a first to a second side, the heat dissipation fins being provided on surfaces of the second conduits, the first side not facing the coolant tank and the second side facing the coolant tank.

Inventors: Suzuki; Osamu (Kasumigaura, JP), Yasuda; Yosuke (Hitachinaka, JP), Horiuchi; Keisuke (Hitachinaka, JP), Hayashi; Tomoo (Kudamatsu, JP), Nishihara; Atsuo (Kashiwa, JP), Funakoshi; Sunao (Kasumigaura, JP)

Assignee: Hitachi, Ltd.

International Classification: H05K 7/20 (20060101); F28F 7/00 (20060101)

Expiration Date: 2019-11-04 0:00:00