access icon free Multimode step-up bidirectional series resonant DC/DC converter using continuous current mode

This study presents the analysis and results of a technique that allows the conventional series resonant DC/DC converter to work as a step-up and step-down converter. The controller can choose between several novel step-up modes and the traditional step-down mode. These modes are analysed by presenting their DC characteristics. The choice of mode is governed by the converter's main controller. The converter reduces the operation frequency range and maximises efficiency by selecting the appropriate mode for the particular load and voltage conversion ratio case. Experimental results in a 6 kW prototype validate the analysis and the proposed controller. Finally, the presented converter is compared with a step-up fixed mode converter in order to appreciate the advantages.

Inspec keywords: resonant power convertors; DC-DC power convertors; frequency control; electric current control

Other keywords: power 6 kW; step-down converter; continuous current mode; operation frequency range reduction; efficiency maximization; load-and-voltage conversion ratio case; step-up fixed mode converter; multimode step-up bidirectional series resonant DC-DC converter

Subjects: Frequency control; DC-DC power convertors; Current control; Control of electric power systems

References

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      • 1. Kazimierczuk, M.K., Czarkowski, D.: ‘Resonant power converters’ (John Willey & Sons, 1995).
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      • 3. Vorperian, V., Cuk, S.: ‘A complete DC analysis of the series resonant converter’. 13th Annual Power Electronics Specialists Conf., Cambridge, UK, June 1982, pp. 85100.
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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-pel.2014.0925
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