System and method for integrated battery charging and propulsion in plug-in electric vehicles

A system for integrated charging an electric vehicle, comprising:

• a hybrid excitation machine operable in a traction mode as a traction motor or in an integrated charging (IC) mode and including a rotor separated by an air gap from a stator having a set of AC stator windings to conduct an AC electrical current to induce a magnetic flux across said air gap;
• said set of AC stator windings configured to conduct the AC electrical current from an AC utility line voltage supply in the IC mode and for filtering and/or boosting an AC voltage therefrom;
• an AC-DC converter, configured to rectify the AC electrical current from the AC utility line voltage supply to an intermediate DC voltage on an intermediate DC conductor;
• a DC-DC converter, producing an output DC voltage different than an input DC voltage to the DC-DC converter;
• a battery bus energized with a first DC voltage and;
• a second DC bus energized with a second DC voltage different than the first DC voltage;
• wherein the system is configured to operate in a first mode with the DC-DC converter transmitting electrical power from the AC-DC converter to the battery bus;
• and
• wherein the system is configured to operate in a second mode with the DC-DC converter transmitting electrical power from battery bus to the second DC bus.