Replacing heatsinks – Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) User Manual
Page 63
Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
63
Component Definition and Maintenance Chapter 3
Replacing Heatsinks
There are four different styles of heatsinks used in PowerFlex air-cooled drives,
depending on thermal requirements:
• Aluminum Type W have a plurality of short internal fins along the internal
surfaces
• Aluminum Type M have internal fins with flat surfaces.
• Copper heatsinks have internal fins made from folded copper foil
• heatpipe sinks have a stack of aluminum fins
The lighter aluminum heatsink has a very fine ventilation pattern through the
heatsink. The heavier copper heatsink has a basic ventilation pattern with larger
openings for airflow. You can install flow restrictor plates on some heatsinks to
optimize airflow.
Figure 40 - Aluminum Type W (left) and copper (right) heatsinks
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