A building-block approach to efficiency and cost models of power electronic systems

This paper presents efficiency and cost models of power electronic converters based on converter ratings and datasheet information. These models aid in creating rapid prototypes which facilitate the component selection process. Through this rapid prototyping, users can estimate efficiency and cost which are essential in design decisions. The proposed approach treats main power electronic components as building blocks that can be re-arranged for different topologies. In order to get efficiency models, power losses of each building block are estimated. Cost models for each building block are derived based on an extensive market survey. Three examples are used to illustrate the proposed approach - boost and buck converters in continuous conduction mode (CCM) and flyback converter in discontinuous conduction mode (DCM). Achieved cost and loss estimates are over 92% accurate when compared to measured losses and real cost data. This paper presents derivations of the proposed models, detailed experimental measurements and demonstration of a GUI that integrates all models.