Ripple current and electrical noise characterization of DC BUS capacitors for future power electronics

Teppei Akiyoshi, Guanghui Wang, Heath Hofmann, Michael T. Lanagan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For automotive applications there is an increasing demand to miniaturize power electronics circuits and operate at higher temperatures. Active SiC-based devices operate at high frequency which decreases circuit dimensions. Passive components, such as the DC-BUS capacitor, must complement new SiC technology. In this study the high frequency performance of DC-BUS capacitors in a DC-DC converter was tested. The relationship between ripple voltage and ripple current were explored as a function of switching frequency (fs) and total DC-BUS capacitance. The DC-BUS capacitor's charging and discharging current was independent of the capacitance or switching frequency. The calculated necessary capacitance for DC-BUS capacitor was proportional to 1/fs and 1/fs 2 by assuming constraining condition of ripple voltage and ripple current, respectively. In addition, to minimize the DC-BUS capacitor size, the current density through the capacitor was calculated as proportional to fs and fs 2 by assuming constraining condition of ripple voltage and ripple current, respectively. Therefore, high current density performance will be important to miniaturize power electronic circuits by increasing switching frequency. DC-BUS current and DC-BUS voltage noise increased with increasing switching frequency over a wide frequency range. The benefit of using a multilayer ceramic capacitor (MLCC) to reduce noise was demonstrated.

Original languageEnglish (US)
Title of host publicationCARTS USA 2007
Pages144-156
Number of pages13
StatePublished - 2007
Event27th Symposium for Passive Components, CARTS-USA 2007 - Albuquerque, NM, United States
Duration: Mar 26 2007Mar 29 2007

Other

Other27th Symposium for Passive Components, CARTS-USA 2007
CountryUnited States
CityAlbuquerque, NM
Period3/26/073/29/07

Fingerprint

Power electronics
Capacitors
Switching frequency
Capacitance
Electric potential
Networks (circuits)
Current density
Ceramic capacitors
DC-DC converters
Multilayers
Temperature

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Safety, Risk, Reliability and Quality
  • Materials Science(all)

Cite this

Akiyoshi, Teppei ; Wang, Guanghui ; Hofmann, Heath ; Lanagan, Michael T. / Ripple current and electrical noise characterization of DC BUS capacitors for future power electronics. CARTS USA 2007. 2007. pp. 144-156
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Akiyoshi, T, Wang, G, Hofmann, H & Lanagan, MT 2007, Ripple current and electrical noise characterization of DC BUS capacitors for future power electronics. in CARTS USA 2007. pp. 144-156, 27th Symposium for Passive Components, CARTS-USA 2007, Albuquerque, NM, United States, 3/26/07.

Ripple current and electrical noise characterization of DC BUS capacitors for future power electronics. / Akiyoshi, Teppei; Wang, Guanghui; Hofmann, Heath; Lanagan, Michael T.

CARTS USA 2007. 2007. p. 144-156.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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