Accurate core-loss characterization is essential to push the power density of power converters to their limits. However, existing core-loss measurement methods still have some limitations, such as a slow test speed and a complex probe calibration procedure. In particular, accurate phase-difference measurement is time-consuming because a fast Fourier transform analysis with a kHz-range frequency interval is typically applied to reduce the influence of noise. An automated measurement system for magnetic core-loss characterization is described in this paper. An accurate phase-detection block with programmable attenuators is developed to measure the phase difference between voltage and current waveforms. The proposed system considerably improves the test speed while providing comparable accuracy to the existing method.
A. Huang et al., "Efficient and Accurate Phase-Measurement Method for Core-Loss Characterization," Review of Scientific Instruments, vol. 93, no. 2, article no. 024701, American Institute of Physics, Feb 2022.
The definitive version is available at https://doi.org/10.1063/5.0074290
Electrical and Computer Engineering
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01 Feb 2022
National Science Foundation, Grant IIP-1916535