On power losses in switched supercapacitor circuits

Author

Kushnerov, Alexander ; Bukashev, Fedor

Author_Institution

Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beersheba, Israel

fYear

2014

fDate

21-24 Sept. 2014

Firstpage

1100

Lastpage

1103

Abstract

Based on the Westerlund-Ekstam model, the paper presents an estimation of power losses in an elementary switched supercapacitor circuit. The power losses are found analytically and represented in the form of equivalent resistance. It is shown that as compared to an ideal capacitor, the use of supercapacitor is preferred at low switching frequency, f <;1/(5RC). In addition, a straightforward method to obtain the parameters of the lumped element model of supercapacitor is proposed. The theoretical results were verified by simulations. Possible applications of the obtained results include characterization of the supercapacitors in the time-domain and equalizing the voltages across serially connected supercapacitors.

Keywords

losses; supercapacitors; Westerlund-Ekstam model; equivalent resistance; lumped element model; power losses; power losses estimation; serially connected supercapacitors; switched supercapacitor circuits; Impedance; Integrated circuit modeling; Power electronics; Resistance; Supercapacitors; Switches; Electrochemical capacitor; fractional derivative; lumped element model; ultracapacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Motion Control Conference and Exposition (PEMC), 2014 16th International

Conference_Location

Antalya

Type

conf

DOI

10.1109/EPEPEMC.2014.6980656

Filename

6980656