A Multiphase Traction/Fast-Battery-Charger Drive for Electric or Plug-in Hybrid Vehicles

摘要

For Electric Vehicles (EV), the charger is one of themain technical and economical weaknesses. This paper focuses onan original electric drive [1]-[3] dedicated to the vehicle tractionand configurable as a battery charger without need of additionalcomponents. This cheap solution can outfit either electric orplug-in hybrid automotive vehicles, without needing additionalmass and volume dedicated to the charger. Moreover, it allows ahigh charging power, for short duration charge cycles. However,this solution needs specific cares concerning the electricalmachine control. This paper deals with the control of this drive[1], focusing on traction mode. In introduction, a review is doneabout topologies of combined on-board chargers. Then, thestudied topology is introduced; using a 3-phase brushlessmachine supplied with a 6-leg Voltage Source Inverter (VSI). Amodel for its control is defined in the generalized Concordiaframe, considering the traction mode. Then, an analysis of thismodel is established using a multimachine theory and a graphicalformalism (the Energetic Macroscopic Representation denotedEMR). Using EMR, a description of energy flows shows specificcontrol constraints. Indeed, numerical simulations illustrate theperturbations on the currents and the torque when controllingthe machine with standard control methodologies. An improvedcontrol, deduced from the previous analysis, shows goodperformances, strongly reducing currents and torque ripples.