Wide Bandgap Semiconductor Based High Performance Bidirectional Resonant Converter for Electric Vehicle Application

An Improved Topology of Isolated Bidirectional Resonant DC-DC Converter Based on Wide Bandgap Transistors for Electric Vehicle Onboard Chargers

“…As can be seen, it employs fewer passive elements than conventional CLLLC converters [15]. Tis results in high efciency and power density, which are discussed in detail in the section "Results and Discussions."…”

“…Tese BDCs can power EV battery loads while also providing power feedback to the power grid. Dual active bridge (DAB) [10,11] and CLLLC [12][13][14][15][16] converters are among the current BDC topologies that have drawn a lot of focus because of the high-frequency (HF) transformers' simplistic and symmetrical architecture on both sides, high efciency, high conversion ratio, and high power density.…”

“…Consequently, CM chokes can be reduced in size, while the converter power density can be increased. In [15], a WBG switching device-based CLLLC converter was designed and evaluated. GaN switching devices have been proven to be the most efcient.…”

“…Te PID controller parameters, nevertheless, are not optimized in this work. However, in symmetrical bidirectional topologies, such as the CLLLC converter [12][13][14][15][16], there are at least fve resonant elements, whereas, in asymmetric bidirectional topologies, such as the proposed CLLL converter, there are only four resonant elements, which thus helps in reducing the difculty of parameter design. It also minimizes the design's size and cost.…”

“…Despite having less thermal conductivity than SiC, GaN switching devices can provide high power densities with efcient cooling approaches. GaN switching devices are therefore capable of maintaining high efciency during the highfrequency operation among the semiconductor switching devices that are currently available [15].…”