Abstract
Three integrated battery charger concepts based on six-phase electrical machines (EMs) are presented in this article. State-of-the-art topologies for galvanically isolated integrated chargers are reviewed as a basis for a novel integrated charger using the electrical drive (e-drive) as an isolated dc/dc converter, while the rotor is kept at standstill. Efficiency levels up to 88% and a cost breakdown are reported. Furthermore, the well-known reconfigurations of three-phase machines are reviewed and proposed as a basis for novel series-connected boost–buck converters, in which each stage is represented by one of the two three-phase machine windings and power electronic converters. The efficiency analysis of a 144-kW e-drive under this 6.6-kW dc biased battery charging condition is presented. The EM iron losses are calculated with finite-element method (FEM) using new Steinmetz parameters based on ring core measurements reflecting charging conditions. In addition, the dc and ac copper losses are analytically calculated. Moreover, inverter losses are analyzed based on their own switching loss measurements. The calculated efficiency of the integrated charger is compared with measurement results. The difference in efficiency between both remains within ±1% and efficiency levels up to 93% are reported. Finally, silicon carbide technology shows enhanced efficiencies.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: IEEE Transactions on Transportation Electrification
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.