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An Integrated Battery Charger for EV applications based on an Open End Winding Multilevel Converter configuration

A new approach to realize an integrated battery charger is described in this paper, based on the Asymmetrical Hybrid Multilevel Converter topology. Such a particular open-end winding motor configuration has proved to be more efficient than conventional inverter topologies in EV motor drive applications but it can be also turned in an on-board battery charger only by acting on the control system. Thus, no additional components, nor circuit reconfiguration through extra power switches are required. Moreover, the obtained battery charger can be supplied either by a standard AC single-phase grid, either by a DC power source for fast recharging.