CONTROL METHOD FOR CHARGER APPARATUS FOR AN ELECTRIC VEHICLE

A method of controlling an electrical system for a grid-enabled vehicle, the system comprising: a bi-directional DC energy source; an electric machine including a rotor, a stator, a first winding and a second winding, wherein the stator carries the first winding; a first control circuit connected to the first winding and including an input configured to be coupled to the grid; and a second control circuit through which the second winding is connected to the bi-directional DC energy source. The method comprises: coupling the first control circuit to the grid; operating the first control circuit according to a field-oriented current space vector method so as to convert grid-supplied electrical energy into an alternating voltage waveform, comprising periodically switching a current vector in a d-q reference frame between diametrically opposed first and second vector points, the current vector being disposed at an angle relative to the d-axis to define a d-axis component value and a q-axis component value; and charging the bi-directional DC energy source using an induced alternating voltage waveform in the second winding arising through magnetic coupling between the first and second windings.