Cooling system types for inverter enclosure
From the enclosure that contains the inverter, the heat of the inverter and other equipment
(transformers, lamps, resistors, etc.) and the incoming heat such as direct sunlight must be dis-
sipated to keep the in-enclosure temperature lower than the permissible temperatures of the in-
enclosure equipment including the inverter.
The cooling systems are classified as follows in terms of the cooling calculation method.
● Cooling by natural heat dissipation from the enclosure surface (Totally enclosed type)
● Cooling by heat sink (Aluminium fin, etc.)
● Cooling by ventilation (Forced ventilation type, pipe ventilation type)
● Cooling by heat exchanger or cooler (Heat pipe, cooler, etc.)
Tab. 2-2: Cooling system types for inverter enclosure
2 - 10
(Enclosed, open type)
Low in cost and generally used, but the enclosure
size increases as the inverter capacity increases.
For relatively small capacities.
Being a totally enclosed type, the most appropriate
for hostile environment having dust, dirt, oil mist,
etc. The enclosure size increases depending on the
Having restrictions on the heatsink mounting posi-
tion and area, and designed for relative small
For general indoor installation. Appropriate for
enclosure downsizing and cost reduction, and often
Totally enclosed type for enclosure downsizing.