Patent ID: 8411402
Filing Date: 2013-04-02
Classification: H01L,H05K

Abstract:
1. An arrangement for cooling a high voltage converter, comprising: a major loop adapted to conduct a coolant liquid, a pump configured to circulate the coolant liquid in said loop, said loop being adapted to conduct said coolant liquid to pass power semiconductor devices of said converter for absorbing heat energy generated thereby, a heat exchanger configured to lower a temperature of said coolant liquid before passing said power semiconductor devices again, a cooling apparatus arranged outside said loop, containing a volume of a cooling medium and adapted to cool the volume of medium to a temperature substantially lower than the temperature of said coolant liquid after having passed the heat exchanger in said loop, wherein said cooling medium volume is arranged in an extra loop connected to said major loop, and a control unit adapted to control at least a part of the flow of said coolant liquid to be diverted from said major loop to said extra loop for delivering heat to said medium before arriving to the power semiconductor devices upon determining that there is a need of cooling said power semiconductor devices not possible to fulfil by a temperature of said coolant liquid obtainable by circulating the coolant solely in said major loop.