| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a heat radiator for radiating heat absorbed from a heating element such as an IGBT. SOLUTION: The maximum heat radiation amount of the heat radiator 5 is turned to be equal to or less than the maximum heat generation of the IGBT 3. Then, even when the heat radiation capability of the heat radiator 5 is equal to or less than the maximum heat generation of the IGBT 3, since the rising speed of the temperature of cooling water returning to a heatsink 4 is sufficiently lower than the temperature rising speed of the IGBT 3 by heat capacity that the cooling water, the heatsink 4 and the heat radiator 5 or the like have, the temperature of the cooling water returning to the heatsink 4 is maintained low and the physical size of the heat radiator 5 is miniaturized. COPYRIGHT: (C)2005,JPO&NCIPI |
