VFD IGBT Heat Sink Upgrade
Replacement heat sink for a VFD power unit with a thicker base and controlled flatness, replacing bonded fins.
Requirement
The customer VFD derated frequently under high summer load. Their bonded-fin sink had a thin base and poor flatness, so thermal grease contact was uneven. They needed more cooling within the existing mounting space.
Our approach
We thickened the base to 12 mm and moved to a skived structure at 2.5 mm fin pitch. The mounting face is milled and flatness-corrected, with roughness set to suit the customer grease. Overall dimensions were reverse-engineered from the old sink so it drops in directly.
Delivery and inspection
Five samples for on-site comparison, then production with critical dimension and flatness sampling.
Project summary
On-site testing showed lower module temperature and fewer derating events. The same construction is now used on another model series.
Products used in this project
For a similar project, send your drawing — we will check whether the existing construction can be reused or needs redesign.
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