Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 33, Issue 11, Pages 9127-9129Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2018.2822771
Keywords
Ceramic capacitors; dielectric devices; dielectric losses; Steinmetz equation
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Applying the observed frequency dependence of the equivalent series resistance of ferroelectric-based ceramic capacitors, the value of a parallel resistor that models the losses is extracted for small signal excitation. The result is then used to develop a loss equation of the studied ceramic capacitors, which is found to conform to the Steinmetz equation template. This leads to the conclusion that the small signal hysteresis curves of ferroelectric-based ceramic capacitors do not change with frequency. Based on the derived equations, a figure of merit is proposed to ease the comparison of ferroelectric capacitors with respect to losses.
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