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Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems
Abstract
A simple analytical expression for the current stress on the DC-link capacitor caused by the load-side inverter of a voltage DC-link-converter system is derived. The DC-link capacitor-current RMS value is determined from the modulation depth and by the amplitude and the phase angle of the inverter output current assuming a sinusoidal inverter output current and a constant DC-link voltage. Despite neglecting the output-current ripple, the results of the analytical calculation are within 8% of measurements made from digital simulation and an experimental system, even if the output-current ripple is relatively high as in the case of low-frequency IGBT inverter systems. The simple analytical expression provides significant advantages over simulation methods for designing the DC-link capacitor of PWM converter systems.
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Choudhury, A., Pillay, P., & Williamson, S. S. (2014) · IEEE Journal of Emerging and Selected Topics in Power Electronics · doi:10.1109/jestpe.2014.2310140 · Cited by 135
Metadata
- Authors
- Kolar, J. W., & Round, S. D.
- Venue
- IEE Proceedings - Electric Power Applications
- Published
- 2006-07
- Volume
- 153
- Issue
- 4
- Pages
- 535-543
- ISSN
- 1350-2352 (ISSN-L)
- 1359-7043
- OpenAlex
- W2004798970
- Cited by
- 372
- References
- 0
- FWCI
- 2.02
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems. https://app.cochat.ai/papers/10.1049/ip-epa:20050458
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- Kolar, J. W., & Round, S. D. (2006). Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems. IEE Proceedings - Electric Power Applications. https://doi.org/10.1049/ip-epa%3A20050458
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