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Installation of the inverter and enclosure design
1.4.2
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 dissipated 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.
1) Cooling by natural heat dissipation from the enclosure surface (totally enclosed type)
2) Cooling by heat sink (aluminum fin, etc.)
3) Cooling by ventilation (forced ventilation type, pipe ventilation type)
4) Cooling by heat exchanger or cooler (heat pipe, cooler, etc.)
Cooling System
Natural ventilation
(enclosed type / open type)
Natural
Natural ventilation
(totally enclosed type)
Heatsink cooling
Forced ventilation
Forced air
Heat pipe
10
Enclosure Structure
INV
INV
Heatsink
INV
INV
Heat pipe
INV
Comment
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 inverter capacity.
Having restrictions on the heatsink mounting position and
area, and designed for relative small capacities.
For general indoor installation. Appropriate for enclosure
downsizing and cost reduction, and often used.
Totally enclosed type for enclosure downsizing.
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