Novel technique for bidirectional series-resonant DC/DC converter in discontinuous mode

This study analyses a novel technique for obtaining a voltage conversion ratio greater than one in a bidirectional seriesresonant DC/DC converter (SRC). The converter works in a discontinuous mode: it transfers energy in packets, but it also accumulates some packets in order to raise the output voltage. This study presents a comprehensive theoretical analysis for the two modes: the step-down mode (common mode) and the novel step-up mode. The converter transfers energy during fixed time intervals (called states), and it is also able to accumulate energy in a novel state called the accumulation state. With this, the circuit can achieve a voltage conversion ratio of up to two. In addition, a design methodology is presented, and it is validated in the design of a high-current bidirectional DC/DC converter for battery applications. The results of the voltage conversion ratio and efficiency measurement are presented along with a comparison with an resonant LLC converter. The converter reaches an efficiency rate of 91% and the voltage conversion ratio varies from 0.8 to 1.22 at maximum power. Using this novel technique, the SRC can now be used in a bidirectional DC/DC converter applied to energy storage devices, such as batteries or supercapacitors.

[1]  Hongchang Liu,et al.  An efficient isolated bi-directional half bridge resonant DC/DC converter , 2012, 2012 IEEE Third International Conference on Sustainable Energy Technologies (ICSET).

[2]  R. Zane,et al.  Minimum Current Operation of Bidirectional Dual-Bridge Series Resonant DC/DC Converters , 2012, IEEE Transactions on Power Electronics.

[3]  Xiangning He,et al.  LCC Resonant Converter Operating under Discontinuous Resonant Current Mode in High Voltage, High Power and High Frequency Applications , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[4]  Quan Li,et al.  An analysis of a resonant half bridge dual converter operating in continuous and discontinuous modes , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[5]  Jee-Hoon Jung,et al.  Design Methodology of Bidirectional CLLC Resonant Converter for High-Frequency Isolation of DC Distribution Systems , 2013, IEEE Transactions on Power Electronics.

[6]  Yu-Lung Ke,et al.  Battery Float Charge Technique Using Parallel-Loaded Resonant Converter for Discontinuous Conduction Operation , 2012, IEEE Transactions on Industry Applications.

[7]  Alex Q. Huang,et al.  A novel wide voltage range bi-directional series resonant converter with clamped capacitor voltage , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[8]  Dominik Buecherl,et al.  Theory of operation, design procedure and simulation of a bidirectional LLC resonant converter for vehicular applications , 2010, 2010 IEEE Vehicle Power and Propulsion Conference.

[9]  Praveen K. Jain,et al.  Series–Parallel Resonant Converter in Self-Sustained Oscillation Mode With the High-Frequency Transformer-Leakage-Inductance Effect: Analysis, Modeling, and Design , 2007, IEEE Transactions on Industrial Electronics.

[10]  Chen Zhao,et al.  Design consideration of the voltage stress clamping rectifier configuration used for the front-end Dc/Dc converter with the capacitive output filter , 2009, 2009 IEEE 6th International Power Electronics and Motion Control Conference.

[11]  Hanju Cha,et al.  Comparative Analysis of Charging Modes of Series-Resonant Converter for an Energy Storage Capacitor , 2013, IEEE Transactions on Plasma Science.

[12]  Luis Fontan,et al.  High-Current Rectifier Topology Applied to a 4-kW Bidirectional DC–DC Converter , 2014 .

[13]  M. H. Pong,et al.  Design and analysis of discontinuous mode series resonant converter , 1994, Proceedings of 1994 IEEE International Conference on Industrial Technology - ICIT '94.

[14]  R. Ayyanar,et al.  PWM control of dual active bridge: comprehensive analysis and experimental verification , 2011, 2008 34th Annual Conference of IEEE Industrial Electronics.

[15]  Andrew C. Chu,et al.  Comparison of commercial supercapacitors and high-power lithium-ion batteries for power-assist applications in hybrid electric vehicles , 2002 .

[16]  A. A. Ferreira,et al.  Control Strategy for Battery-Ultracapacitor Hybrid Energy Storage System , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[17]  Kwang-Heon Kim,et al.  Zero-current soft-switching bidirectional DC-DC converter for high efficiency DC uninterruptible power supply , 2009, INTELEC 2009 - 31st International Telecommunications Energy Conference.

[18]  M.Z. Youssef,et al.  A review and performance evaluation of control techniques in resonant converters , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[19]  J. M. Echeverria,et al.  30kW DC-DC Converters with Regenerative Mode for Electric Cars , 2012 .

[20]  N. Schofield,et al.  Battery and supercapacitor combination for a series hybrid electric vehicle , 2010 .

[21]  Xiaodong Li,et al.  Analysis and Design of High-Frequency Isolated Dual-Bridge Series Resonant DC/DC Converter , 2010, IEEE Transactions on Power Electronics.

[22]  D.M. Divan,et al.  A three-phase soft-switched high power density DC/DC converter for high power applications , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[23]  Zhe Zhang,et al.  Optimal Design of a Push-Pull-Forward Half-Bridge (PPFHB) Bidirectional DC–DC Converter With Variable Input Voltage , 2012, IEEE Transactions on Industrial Electronics.

[24]  Ashoka K. S. Bhat,et al.  Series-parallel resonant converter operating in discontinuous current mode. Analysis, design, simulation, and experimental results , 2000 .

[25]  R. Martinelli,et al.  Steady-state analysis of the LLC series resonant converter , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).