Cooling System Types For Inverter Enclosure - Mitsubishi Electric FR-A760 Series Instruction Manual

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, open type)
Natural
cooling
Natural ventilation (Totally
enclosed type)
Heatsink cooling
Forced
Forced ventilation
cooling
Heat pipe
Enclosure Structure
Low in cost and generally used, but the enclosure size
increases as the inverter capacity increases. For
INV
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
INV
capacity.
Having restrictions on the heatsink mounting position
Heatsink
and area, and designed for relative small capacities.
INV
For general indoor installation. Appropriate for enclosure
downsizing and cost reduction, and often used.
INV
Heat
pipe
Totally enclosed type for enclosure downsizing.
INV
Installation of the inverter and enclosure
Comment
design
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