Thermal Impressions: Cooling Fan Performance.

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Introduction: Thermal Impressions: Cooling Fan Performance.

About: Update 12 September 2017: A very special thanks to Sam Elder, a manager here at Instructables, who tracked down the cause of my lost publications and fixed the issue. Take a bow Sam!

After modding the cooling arrangement on my off grid inverter, I wanted to check that the new fan was doing its job. The inverter case is kept warm, not hot, when my air conditioner is on. This is a good sign.

The thermal image shows hot spots where the power semiconductors are located.

The seek thermal xr camera was used for this inspection.

Step 1: The Fan.

The DC brushless fan draws air through the inverter and then exhausts it. The hot spot temperature is 97C which is pretty high but I have a ready supply of spares when it fails.

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