A method for core loss calculation based on sinusoidal losses for DC-DC converters operating at various duty cycle values and temperatures

Abstract

The paper presents an experimental verification of a method for computing losses in a magnetic core operating in a DC-DC converter with a variable duty cycle, based on losses measured under sinusoidal excitation conditions. The core operating conditions that influence the losses and the method for their measurement are presented. The measurement setup was designed for this research, its basic features are discussed in the paper. The results obtained from the analysis were compared with core loss measurements obtained from the Brockhaus MPG-200 system. The theoretical foundation for core loss calculations and the measurement error analysis are also presented. The discussion of the results takes into account additional factors, such as the effect of working temperature on loss level.