Cooling
The main heat sources inside the equipment correspond to: losses in the bridge rectifier (IGBTs), the
input filter and the output dV/dt filter. The SD750 series has an overall efficiency higher than 98%, so
losses due to heat dissipation correspond to 2% of the power supplied by the equipment.
The cooling system of the drive depends on its degree of protection and its frame. In general terms, the
drive has been designed with three independent cooling areas.
Cooling airflow for SD750. Frames 4 to 11(Protection Grade IP54).
1
st
Area - Electronics:
IP20 cabinets incorporate extractors in its upper part that evacuate the internal heat generated in the
area.
IP54 cabinets keep electronic components fully sealed. The internal heat generated is evacuated through
the metal doors thanks to an internal forced convection system.
2
nd
Area – Rectifier bridge, Inverter bridge and DC bus cooling area:
The drive has fans that collect the air from the bottom and evacuate it through the central grid at the top.
The fans propel the air through the radiator thus evacuating the heat generated by the main components.
3
rd
Area – Filters:
Intake grills are placed on the sides of the equipment. In addition, the rear upper part incorporates
extractors.
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