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 language | English |
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Title of host publication | Proceedings of IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2014 |
Number of pages | 6 |
Publisher | IEEE Press |
Publication date | Dec 2014 |
ISBN (Print) | 9781479963744 |
DOIs | |
Publication status | Published - Dec 2014 |
Event | 2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) - Mumbai, India Duration: 16 Dec 2014 → 19 Dec 2014 |
Conference
Conference | 2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) |
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Country/Territory | India |
City | Mumbai |
Period | 16/12/2014 → 19/12/2014 |
Keywords
- Modulation scheme
- PWM
- Pulse width modulation
- DC link
- Capacitor
- Capacitor current
- Analyses
- dc link capacitor
- current stress
- capacitor lifetime