DC Capacitor Testing Capability Intrinsic to Multi-leg Converters

Nemec, Mitja; Ambrozic, V.; Rihar, Andraž; Zajec, Peter

doi:10.1109/cpe-powereng48600.2020.9161692

2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) 2020

DOI: 10.1109/cpe-powereng48600.2020.9161692

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DC Capacitor Testing Capability Intrinsic to Multi-leg Converters

Mitja Nemec

V. Ambrozic

Andraž Rihar

et al.

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2022

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Temperature Characteristic Analysis of the Output Intrinsically Safe Buck Converter and Its Design Consideration

Liu

Liang

et al. 2022

Energies

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Aiming at the unreliability resulting from ignoring the temperature effect and randomness of switching frequency in the traditional design method of an intrinsically safe Buck converter, a reliable design method based on the minimum frequency and considering the temperature characteristic is proposed. The theoretical design range of capacitance is deduced according to the maximum output ripple voltage and output intrinsic safety performance requirements. Considering the temperature characteristics of the capacitor, the actual maximum and minimum capacitances are obtained corresponding to the theoretical design capacitance within a given temperature range. It is pointed out that the actual minimum capacitance increases with the decrease of switching frequency, while the actual maximum capacitance is independent of frequency. Therefore, it can be deduced that there exists a minimum frequency which can meet the requirements of both output ripple voltage and intrinsically safe performance. When the actual maximum capacitance equals the actual minimum capacitance, the analytic expression of the minimum frequency is obtained. Assuming a capacitance adjustment, the actual working frequency of the converter corresponding to the minimum frequency is deduced. The design flow of an intrinsically safe Buck converter based on the minimum switching frequency considering the temperature characteristic is presented. The correctness of the theoretical analysis and the feasibility of the proposed design method are verified by experimental results. This design method can also be applied to other types of intrinsically safe converters.

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Temperature Characteristic Analysis of the Output Intrinsically Safe Buck Converter and Its Design Consideration

Liu

Liang

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

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DC Capacitor Testing Capability Intrinsic to Multi-leg Converters

Cited by 1 publication

References 10 publications

Temperature Characteristic Analysis of the Output Intrinsically Safe Buck Converter and Its Design Consideration

Temperature Characteristic Analysis of the Output Intrinsically Safe Buck Converter and Its Design Consideration

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