High Accuracy Calorimetric Measurements & Modeling of Ceramic Capacitor Losses | Samantha Coday

Описание: High Accuracy Calorimetric Measurements and Modeling of Ceramic Capacitor Losses Under Large Ripple Operation

Paper: https://ieeexplore.ieee.org/abstract/...

Speaker

Samantha Coday
PhD Student
University of California at Berkeley

Abstract:

Recent work on hybrid and resonant switched-capacitor converters, as well as on flying capacitor multi-level converters, have demonstrated exceptionally high efficiencies and power densities, through the use of multilayer ceramic capacitors (MLCCs).

However, when used in such converters as the main energy transfer components, the capacitors experience high voltage and current ripple, under large dc bias. Yet, capacitor characterization today is typically done only with small signal excitation, and under low or no dc bias, yielding highly inaccurate loss models when the capacitor is used as the main energy transfer element.

This work presents a technique for obtaining detailed loss characterizations of MLCCs under more realistic operating conditions, and presents experimental results from a number of different capacitors. Finally, several simple loss models are presented and compared which helps guide practicing engineers in the design of capacitor-based power converters.

Speaker Bio:

B.S. in Electrical Engineering and Mathematics from Southern Methodist University in 2017

Masters in Electrical Engineering from UC Berkeley in 2019

Current PhD student at UC Berkeley in Dr. Robert Pilawa-Podgurski’s research lab.

Focusing on dc-dc high voltage hybrid switched capacitor topologies for space and electric airplane applications.