Increase in temperature on the surface of a large iron-based cabinet of a power converter due to generation of eddy current in the cabinet's bus bars

The increase in surface temperature of the large cabinets of power converters, which are typically made of iron materials (with magnetic characteristics), was investigated. For this investigation, a method combining electromagnetic-field analysis and thermal-fluid analysis by using in-house analysis tools was established. According to the investigation results, the calculated temperature rise due to the eddy current was consistent (within an error of 9.2%) with the measured temperature rise.