Forced air-cooled heat sink

摘要

PROBLEM TO BE SOLVED: To achieve forced air-cooling of a bus bar connected to a main terminal, and the like without making dust, dirt or the like adhere to the main terminal and the like of a semiconductor module.;SOLUTION: A part of air to be made to flow into a fin 3 is made to flow into a tunnel 10 (branched flow). A tunnel opening 9b is provided on an upper face of the tunnel 10, and a not-shown plate (bus bar) 13 connected to main terminals of each of semiconductor modules 4a and 4b is provided thereon so as to block the tunnel opening 9b. Thereby, in the tunnel opening 9b, air in the branched flow is made to flow to the plate 13, and accordingly the plate 13 is forcibly cooled and efficiency of heat dissipation from the plate 13 is improved.;COPYRIGHT: (C)2014,JPO&INPIT