Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Bidirectional LLC-LC Resonant Converter With Notch Filter
Authors Ki-Chan Jang ; Eun-Soo Kim
Page pp.411-420
ISSN 1229-2214
Keywords Bidirectional DC-DC converter; LLC resonant converter; CLLC resonant converter; ESS (Energy Storage System)
Abstract In this paper, bidirectional LLC-LC resonant DC-DC converter with notch filters in the primary side of resonant circuits is proposed. Even if resonant capacitors are used on the primary and secondary sides, the proposed converter can operate with the high gain characteristics of the LLC resonant converter without mutual coupling of resonant capacitors, regardless of the direction of power flow. In addition, by applying notch filters, the proposed converter can operate with a wider gain control range and can cope with overload and short circuit. The analysis and operating characteristics of the proposed bidirectional LLC-LC resonant converter are investigated. A 3.3 kW prototyped bidirectional LLC-LC resonant converter connected to 750 VDC buses is designed and tested to verify the validity and applicability of this proposed converter.