I. Introduction
Electric vehicles (EVs) typically feature a dedicated on-board charger (OBC) to charge the high-voltage battery from the single-phase and/or the three-phase AC grid. Since the OBC results in added cost, weight and volume, the exploitation of the EV drive system (i.e., inverter and motor) to provide the charging function is currently an active research topic [1], [2]. Integrated on-board chargers (iOBCs) allow for significant cost and volume savings, however they are characterized by unique challenges, such as limited conversion efficiency (being the typical charging power several times lower than the drive system power rating) [3], [4], possible torque production (leading to control complexity, depending on the magnetic field generated within the electrical machine) [5], EMI generation (as for conventional OBCs) [5], [6], and electrical safety (especially for non-isolated topologies) [6].