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.