Heatsinks of power semiconductors

Heatsinks of power semiconductor elements produced and delivered by HPM therm are divided according to the way they remove the exhaust air:

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Air cooled heatsinks with heat pipes

use the physical principles of a heat pipe (an enclosed space partially filled with a heat transfer substance and its vapours
excellent cooling properties
built-up area and weight savings (smaller and lighter than classic aluminium heatsink)
high operating reliability and simple service
the heat pipe is functioning only in the position where the contact block is lower than the fins (gravity heat pipes)
can be used in stationary applications (distribution centres and convertors) as well as in transport applications (trains, trolleybuses, etc)
do not present any environmental threat when following the waste disposal act
can be divided into heatsinks for natural cooling and forced cooling
the thermal output of these heatsinks ranges from few W to several kW


	Free convention		*Forced circulation*

Liquid cooled heatsinks

use coolant for heat removal (its features have to correspond with its use)
represent a more efficient type of a heatsink
use the principle of the heat transfer from a solid substance to a cooling medium - coolant, which tranfers the heat to the external heatsink with a help of a pump
have a solid structure with a small built-up area per unit of outlet output
with regard to the construction, they allow an easy arrangement in various ellectrically connected groups
the choice of a coolant is closely related to the design of the cooling circuit of the alternator
suitable coolants for cooling circuits: industrial, distilled, demineralised and deinoised water, transformer oil, fluoroinets
The liquid cooling circuit is more demanding on operation as well as service than for example air heatsinks with heat pipes
basic accessories are also part oh HPM therm deliveries


Liquid cooled heatsinks for cooling IGBT and IGCT modules		Liquid cooled heatsinks for cooling diodes, tyristores and transistors