High-Efficiency Hybrid LLC Resonant Converter for On-Board Chargers of Plug-In Electric Vehicles
By L. Ta, Ngoc Dat Dao, Dong-Choon Lee. IEEE transactions on power electronics, 2020
162 citations recorded by the source corpus.
This article proposes a hybrid LLC resonant converter with three modes of operation for on-board chargers of electric vehicles. The converter can operate as a full-bridge converter, dual-phase half-bridge LLC converter, or single-phase half-bridge LLC converter to improve efficiency at low-voltage and light-load conditions. Without using additional switches, the operation mode of the proposed converter is switched by different modulation schemes. Moreover, the resonant inductance for LLC operation can be reduced so as to be integrated into the transformers, resulting in an increase in the power density. During the operation of three modes, all the primary switches achieve zero-voltage switching, thus minimizing the switching losses. A 3.2-kW-rated prototype using GaN devices with a power density of 65 W/in3 has been designed and tested to verify the effectiveness of the converter. Experimental results have shown smooth and stable transitions among three modes. A flat efficiency curve with a peak efficiency of 98.5% at full load condition has been achieved.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/9ea86bb81d5ca6e9be38270de6cdaf5a1c271bde
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In Electrical and Electronic Engineering
Citations in the corpus
- A Comprehensive Review of Power Converter Topologies and Control Methods for Electric Vehicle Fast Charging Applications (2022, methodology): “[125] PI control with operating mode selection algorithm based on EV charging profile Operation mode selection and execution based on Vbat, Ibat Vbat, Ibat fs Simple control implementation, performs CV-CC charging by the selection of proper operating mode, enhances efficiency at light load condition”
- Review of Electric Vehicle Charging Technologies, Standards, Architectures, and Converter Configurations (2023, background): “lead to an increase in current and voltage range [263], [264].”
- LLC resonant converter topologies and industrial applications — A review (2020, background): “2, the LLC resonant converter is able to achieve zero-voltage switching (ZVS) turn-on by using parasite parameters ([7]), zero-current switching (ZCS) turn-off of the diodes at the secondary side of the transformer ([8]), electrical isolation from power grid ([9]), low EMI and harmonic pollution ([1”