| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion device and method that prevent breakage of a power semiconductor element. ! SOLUTION: A power conversion unit 11 includes: a module 23 where a power semiconductor element 21 for performing power conversion is mounted on a metal base 22; and a heat sink 24 that contacts the metal base 22 to cool the power semiconductor element 21. On the power conversion unit 11, sensors 26a to 26d are mounted which measure the temperature of the metal base 22 and the temperature and amount of cooling water flowing into/out of the heat sink 24. A control unit calculates the amount of heat flowing into the heat sink 24 from the power semiconductor element 21 by the temperature difference and flow rate of the cooling water, and estimates a junction temperature of the power semiconductor element 21 as an actual measured value from the sensor 26a; when receiving input of an output change instruction to increase power that is output from the power conversion unit 21, calculate |
