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Design considerations of a single stage LLC battery charger

  • Usually battery chargers have two stages and DC charging current is considered to by necessary for a proper charging. To decrease the charger volume, a single stage LLC battery charger is investigated in this paper. PFC stage is eliminated, therefore no bulky capacitor is necessary any more, and battery is charged with a sinusoidal-like charging current. However, previous studies show that such a pulsating charging current has only minimal impact on battery life and efficiency. Design considerations of the resonant tank and optimal transformer design are presented. A 360W single stage LLC converter prototype for e-bike charger achieves a power factor of 0.98, efficiency of 0.93 and power density of 1,8kW/dm³.

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Metadaten
Author of HS ReutlingenWattenberg, Martin; Schwalbe, Ulf
URL:https://ieeexplore.ieee.org/document/8767563
ISBN:978-3-8007-4938-6
Erschienen in:PCIM Europe : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nuremberg, 7-9 May 2019 : proceedings
Publisher:VDE Verlag GmbH
Place of publication:Berlin ; Offenbach
Document Type:Conference proceeding
Language:English
Publication year:2019
Page Number:7
First Page:672
Last Page:678
DDC classes:620 Ingenieurwissenschaften und zugeordnete Tätigkeitenn
Open access?:Nein
Licence (German):License Logo  In Copyright - Urheberrechtlich geschützt