T1689 Technical Manual Rev 07 Drive (CDM) Design
MV3000 Air Cooled DELTA Component Selection – Cooling System Design
Page 91
Figure 3-7. – Side View of Air Path through the Standard DELTA Module System
3.7.3 Secondary Air Cooling
The DELTA modules have a proportion of losses that are removed by the local airflow within the enclosure. The
proportion of losses depends on the ratio of temperatures (module surface temperature-to-air), surface area
and the velocity of air flow. In addition to these stray losses, there is also the power loss from any component
that is not directly by the main cooling fans. These losses and any localised hotspots need to be removed by
the air cooling.
Typical losses for individual DELTA assemblies are given in the Appendix D: MV3000e Drive Selection Charts.
These are for indication only as the exact losses depend on the environmental conditions.
The cooling air temperature and quality should also ensure operation within the environmental conditions
given in Section 2: Specification.
This cooling may be by ventilation through the enclosure or by recirculating the air through a heat-exchanger.
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