High current and high frequency planar inductor loss measurement and analysis

This paper presents an approach of a loss measurement and analysis for high current and high frequency planar inductor. The need for automotive power electronics to operate at high frequency is indispensable for compact packaging size. Accurate analysis of inductor loss is of great importance for downsizing power electronics systems. This paper introduces a loss analysis approach for high frequency and high current inductors, based on an LC resonant method. To demonstrate the accuracy of this method, a conventional calorimetric method was simultaneously conducted. A planar inductor loss-break-down is presented as a case study.