A manufacturer of industrial appliances had a new power conditioning and control system with very limited heat sink space available. The new system had three high power IGBT’s in close proximity with a small thermal window due to a 50°C max ambient temperature condition. To compound the complexity of the project, there was a transient condition to the system that would double the power for 1 minute every 10 minutes. Aavid, Thermal Division of Boyd Corporation, had assisted many other projects with similar form factors although not with this level of power.
The cabinet that housed the heat sink had two fans for forced convection but the airflow was shared with another heat sink to cool an SCR. Although the heat sinks were fully ducted to force all of the available air through them, the top of the system was obstructed by baffling the restricted 65% of the airflow. The new heat sink design would need to mind the difficult balance of airflow vs pressure drop through the entire cabinet.
Heat Pipes for Power Control Case Study
Have questions? We're ready to help!