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Operation Mode Analysis and Peak Gain Approximation of the LLC Resonant Converter
Open accessAbstract
With the advantage of achieving zero voltage switching for a wide input voltage range, the LLC resonant topology has become increasingly popular for use in high power density and high-efficiency power converter applications. However, when the LLC converter is applied to wide input voltage range applications, the widely used fundamental harmonic approximation is incapable of guiding the design due to its inaccuracy. Thus an accurate LLC converter model is desired. In this paper, a generalized mode analysis is presented that provides highly accurate prediction on resonant current and voltage behavior and dc gain characteristic. Also, because operation modes are affected by load, frequency, and gain conditions, the boundaries and distribution of modes are discussed and illustrated. Based on the mode analysis, an approximation method is developed to estimate the peak gain point, which is useful in LLC design. This approximation demonstrates high accuracy within the simulation results. An experimental prototype is built to verify the analysis.
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Citations
Cited by
Jung, J.-H., Kim, H.-S., Ryu, M.-H., & Baek, J.-W. (2013) · IEEE Transactions on Power Electronics · doi:10.1109/tpel.2012.2213346 · Cited by 621
An LLC Resonant DC–DC Converter for Wide Output Voltage Range Battery Charging Applications
Musavi, F., Craciun, M., Gautam, D. S., Eberle, W., & Dunford, W. G. (2013) · IEEE Transactions on Power Electronics · doi:10.1109/tpel.2013.2241792 · Cited by 498
Design Methodology of LLC Resonant Converters for Electric Vehicle Battery Chargers
Deng, J., Li, S., Hu, S., Mi, C. C., & Ma, R. (2014) · IEEE Transactions on Vehicular Technology · doi:10.1109/tvt.2013.2287379 · Cited by 478
Wang, X., Jiang, C., Lei, B., Teng, H., Bai, H. K., & Kirtley, J. L. (2016) · IEEE Journal of Emerging and Selected Topics in Power Electronics · doi:10.1109/jestpe.2016.2575921 · Cited by 107
Design Method of 6-Element Boundary Gain for LLC Resonant Converter of Electric Vehicle
Shen, C., Zhong, H., Zhang, Y., Tang, Y., & Zhang, Y. (2020) · IEEE Access · doi:10.1109/access.2020.3028941 · Cited by 9
Metadata
- Authors
- Fang, X., Hu, H., Shen, Z. J., & Batarseh, I.
- Venue
- IEEE Transactions on Power Electronics
- Published
- 2012-04
- Volume
- 27
- Issue
- 4
- Pages
- 1985-1995
- ISSN
- 0885-8993 (ISSN-L)
- 1941-0107
- OpenAlex
- W2131702754
- Cited by
- 426
- References
- 0
- FWCI
- 10.25
- Type
- journal article
- Language
- en
- Open access
- green
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- Fang, X., Hu, H., Shen, Z. J., & Batarseh, I. (2012). Operation Mode Analysis and Peak Gain Approximation of the LLC Resonant Converter. IEEE Transactions on Power Electronics. https://doi.org/10.1109/tpel.2011.2168545
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