Efficiency of Capacitively Loaded Converters
Publication: Research - peer-review › Article in proceedings – Annual report year: 2012
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Efficiency of Capacitively Loaded Converters. / Andersen, Thomas; Huang, Lina; Andersen, Michael A. E.; Thomsen, Ole Cornelius.
Proceedings of the 38th Annual Conference on IEEE Industrial Electronics Society. IEEE, 2012. p. 368-373.Publication: Research - peer-review › Article in proceedings – Annual report year: 2012
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TY - GEN
T1 - Efficiency of Capacitively Loaded Converters
AU - Andersen,Thomas
AU - Huang,Lina
AU - Andersen,Michael A. E.
AU - Thomsen,Ole Cornelius
PY - 2012
Y1 - 2012
N2 - This paper explores the characteristic of capacitance versus voltage for dielectric electro active polymer (DEAP) actuator, 2kV polypropylene film capacitor as well as 3kV X7R multi layer ceramic capacitor (MLCC) at the beginning. An energy efficiency for capacitively loaded converters is introduced as a definition of efficiency. The calculated and measured efficiency curves for charging DEAP actuator, polypropylene film capacitor and X7R MLCC are provided andcompared. The attention has to be paid for the voltage dependent capacitive load, like X7R MLCC, when evaluating the charging efficiency of converter. Based on the capacitancevoltage curve, the correct capacitance should be chosen when calculating the stored energy; otherwise misleading optimisticefficiency can always be obtained. Actually, when DEAP actuator is not available at the early developing stage, the voltage independent polypropylene film capacitor can be the equivalent capacitive load. Because of the voltage dependent characteristic, X7R MLCC cannot be used to replace the DEAP actuator. However, this type of capacitor can be used to substitute the capacitive actuator with voltage dependent property at the development phase.
AB - This paper explores the characteristic of capacitance versus voltage for dielectric electro active polymer (DEAP) actuator, 2kV polypropylene film capacitor as well as 3kV X7R multi layer ceramic capacitor (MLCC) at the beginning. An energy efficiency for capacitively loaded converters is introduced as a definition of efficiency. The calculated and measured efficiency curves for charging DEAP actuator, polypropylene film capacitor and X7R MLCC are provided andcompared. The attention has to be paid for the voltage dependent capacitive load, like X7R MLCC, when evaluating the charging efficiency of converter. Based on the capacitancevoltage curve, the correct capacitance should be chosen when calculating the stored energy; otherwise misleading optimisticefficiency can always be obtained. Actually, when DEAP actuator is not available at the early developing stage, the voltage independent polypropylene film capacitor can be the equivalent capacitive load. Because of the voltage dependent characteristic, X7R MLCC cannot be used to replace the DEAP actuator. However, this type of capacitor can be used to substitute the capacitive actuator with voltage dependent property at the development phase.
KW - DEAP actuator
KW - Capacitance voltage characteristic
KW - Voltage independent capacitor
KW - Voltage dependent capacitor
KW - Energy efficiency
U2 - 10.1109/IECON.2012.6388791
DO - 10.1109/IECON.2012.6388791
M3 - Article in proceedings
SN - 978-1-4673-2420-5
SP - 368
EP - 373
BT - Proceedings of the 38th Annual Conference on IEEE Industrial Electronics Society
PB - IEEE
ER -