Cooling System Types For Inverter Enclosure - Mitsubishi Electric FR-A802-E Instruction Manual

2.3.3

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.
• Cooling by natural heat dissipation from the enclosure surface (totally enclosed type)
• Cooling by heat sink (aluminum fin, etc.)
• Cooling by ventilation (forced ventilation type, pipe ventilation type)
• Cooling by heat exchanger or cooler (heat pipe, cooler, etc.)
Cooling system
Natural ventilation (enclosed
type / open type)
Natural
Natural ventilation (totally
enclosed type)
Heat sink cooling
Forced ventilation
Forced air
Heat pipe
28
2. INSTALLATION AND WIRING
2.3 Installation of the inverter and enclosure design
Enclosure structure
This system is low in cost and generally used, but the
enclosure size increases as the inverter capacity
INV
increases. This system is for relatively small capacities.
Being a totally enclosed type, this system is the most
appropriate for hostile environment having dust, dirt, oil
mist, etc. The enclosure size increases depending on
INV
the inverter capacity.
This system has restrictions on the heat sink mounting
Heat sink
position and area. This system is for relatively small
INV
capacities.
This system is for general indoor installation. This is
appropriate for enclosure downsizing and cost
INV
reduction, and often used.
Heat
This system is a totally enclosed type, and is
pipe
appropriate for enclosure downsizing.
INV
Comment