Design consideration for high output power density (OPD) converter based on power-loss limit analysis method

Design consideration for a future high output power density converter has been carried out with a power device loss model. The power device loss model has been established by the power-loss limit analysis method which estimates total power loss of semiconductor power devices accurately taking the correlation between circuit stray parameters and device power losses into consideration. An advantage of the design is highly-detailed volume and an output power density of a converter can be estimated quantitatively by using the power device loss model. Optimal configuration of a power converter constructed by conversion circuit part, passive components and a DC-link capacitor was investigated on the thermal problem by the method. Availability of the method was confirmed by the quantitative design of a 3 kVA DC-AC converter constructed by a Si-MOSFET and a SiC-Shottky barrier diode (SBD) hybrid pair.