Analytical Method to Calculate the DC Link Current Stress in Voltage Source Converters

Ghanshyamsinh Vijaysinh Gohil, Lorand Bede, Remus Teodorescu, Tamas Kerekes, Frede Blaabjerg

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

18 Citations (Scopus)
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Abstract

The dc-link capacitor is one of the critical components, which influences the lifetime of the whole voltage source converter unit. For reliable design, the operating temperature of the dc-link capacitor should be known, which is primarily determined by the ambient temperature and the rms value of the current flowing through the dc-link capacitor. A simple analytical method to calculate the rms value of the dc-link capacitor current is presented in this paper. The effect of the line current ripple on the rms value of the dc-link capacitor current is considered. This yields accurate results, especially for the applications with high line current ripple. The effect of the pulsewidth modulation (PWM) scheme on the rms value of the dc-link current is also studied and the analysis for continuous PWM and discontinuous PWM (DPWM) schemes is presented. The proposed analytical method is also verified experimentally.
Original languageEnglish
Title of host publicationProceedings of IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2014
Number of pages6
PublisherIEEE Press
Publication dateDec 2014
ISBN (Print)9781479963744
DOIs
Publication statusPublished - Dec 2014
Event2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) - Mumbai, India
Duration: 16 Dec 201419 Dec 2014

Conference

Conference2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)
Country/TerritoryIndia
CityMumbai
Period16/12/201419/12/2014

Keywords

  • Modulation scheme
  • PWM
  • Pulse width modulation
  • DC link
  • Capacitor
  • Capacitor current
  • Analyses
  • dc link capacitor
  • current stress
  • capacitor lifetime

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