Power Electronics SD700FL Series, Руководство по аппаратному обеспечению и установке

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POWER ELECTRONICS
SD700FL SERIES
MECHANICAL INSTALLATION
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5.4. Cooling
Heat dissipation
The heat generated by the SD700FL depends on the carrier frequency (Hz), the grid frequency and the
load. It could be estimated by the following equation. Rated power condition is the worst case.
P
loss
[W] = 0,03 · P
motor
[W]
5.4.1. Cooling system for the SD700FL corresponding to the drives side.
The heat sources inside the equipment correspond with the inverter bridge (IGBTs), rectifier
bridge, the input RFI filter and the output dV/dt filter. SD700FL series present an overall efficiency
higher than 97% at rated power, so the heat dissipation approximately corresponds to 3% of the
input power.
The cooling system of the drive depends on the degree of protection, the frame type and the
frame size. In general terms, the drive is designed with three independent cooling areas.
Figure 5.5 Cooling airflow for SD700FL. Frames 5
to 11(Drive’s cooling)
1
st
Area - Electronics:
IP20 cabinets are equipped with fans on the top of the cabinet that evacuates the internal heat
generated in the area.
IP54 cabinets have a totally sealed electronics. The internal heat generated is evacuated through
the metallic doors by an internal forced convection system.
2
nd
Area
– Rectifier bridge heat sink, Inverter bridge heat sink and DC bus cooling area:
The drive integrates axial fans that intake the air from the bottom part of the drive and evacuates
it through the middle top outlet gratings. The fans propel the air through the heat sink evacuating
the heat generated by the main components.
3
rd
Area
– Filters:
The inlet gratings are located at both sides of the drive; additionally the drive is equipped with
exhaust fans on the top part.