Pareto front system optimization on the example of a motor drive

During the design process of a power electronic system a variety of operating and component parameters can be varied and combined. Therefore, a huge number of design possibilities arise. In this paper, Pareto front optimizations are utilized to investigate the maximum power density of 3-phase motor inverters. First, the analytical power loss, volume, EMC and thermal models are briefly presented and validated on a 63 kW motor drive system. These models are used for fundamental investigations on the dependency of the optimum switching frequency and power density on the rated power of the motor drive. Combinations of model parameters form a Pareto front analysis.