Patent ID: 8385068

Claim:
A cooling device for a converter, the converter comprising at least a first and a second group of electrically interconnected electrical components stacked onto each other in at least one stack in the converter, where each group includes more than one electrical component that are electrically connected in series with each other and the first and second groups are placed on opposite sides of a connection point connected to a conductor leading to a connection terminal of the converter and the first group of electrical components include components through which a higher effective current runs than the second group, the cooling device being operable for cooling at least said first and second group of electrically interconnected electrical components of the converter and comprising: a first transporting arrangement arranged to transport cooling medium past the first group; and a second transporting arrangement arranged to transport the same cooling medium past the second group, wherein the first transporting arrangement is placed in series with and before the second transporting arrangement for transporting cooling medium to the second transporting arrangement, each transporting arrangement further comprising a set of cooling sections and each cooling section includes at least one cooling surface adapted to be placed in contact with a single electrical component, where several cooling sections have two cooling surfaces opposite of each other and are adapted to be placed between two electrical components of a stack, wherein each electrical component comprises a transistor with anti-parallel diode.