A Loss Measurement Approach of Power Magnetic Components under Practical Power Electronics Conditions

Abstract

With the increasing operating frequency, magnetic components and their design is considered as a significant part to achieve high power density and high efficiency in today's power electronics converters. Accurate losses of these components under practical excitation conditions are still difficult to determine. Therefore, it's crucial to directly measure the loss of these components for loss estimation and further optimization. In this paper, a loss measurement approach of magnetic power components is proposed. To emulate many power electronics relevant waveforms, the excitation source is constructed in a full-bridge topology with SiC MOSFET modules. To improve measuring accuracy, the selection of current probes is discussed then. Moreover, a time delay correction method ensuring precise compensation is implemented in this paper. Finally, to verify the measurement results, an additional dual-inductor experiment is proposed.