Vehicle-grid-home power interface

A power and quality control converter comprising:

• a first full bridge converter configured to provide, from a grid supply of a grid, a DC voltage from which a primary full bridge converter is to provides an output alternating current for use in charging a battery;
• and
• a controller associated with the first full bridge converter and adapted to be associated the primary full bridge converter, and configured to:
• provide a bi-directional wireless coupling between the primary full bridge converter and the battery;
• detect a power requirement of the grid supply or a grid load connected to the grid;
• determine an instantaneous value for the DC voltage to enable the primary full bridge converter to supply power satisfying an associated charging power requirement at full duty cycle;
• operate the primary full bridge converter at full duty cycle;
• adaptively control the first full bridge converter to enable the DC voltage to correspond to the determined instantaneous value;
• control the primary full bridge converter and a secondary full bridge converter associated with the battery to control bi-directional wireless power transfer between the grid, the grid load, and the battery;
• operate the primary full bridge converter and the secondary full bridge converter at a relative phase angle (θ) to direct power flow to or from the battery, with the relative phase angle (θ) being a relative phase angle between respective voltages produced by the first full bridge converter and the primary full bridge converter;
• and
• wirelessly charge the battery.

A method of operating an electric charging apparatus comprising:

• a first full bridge converter configured to provide from a grid supply of a grid a DC link voltage;
• and a primary full bridge converter configured to provide from the DC link voltage an output alternating current for use in charging a battery to be associated with the apparatus, the method comprising:
• providing a bi-directional wireless coupling between the primary full bridge converter and the battery;
• determining a required value for the DC link voltage to cause the output alternating current provided by the primary full bridge converter at full duty cycle to have a power satisfying a detected charging power requirement of the battery;
• controlling the first full bridge converter to cause the DC link voltage to correspond to the required value;
• controlling the primary full bridge converter to operate at full duty cycle;
• controlling the primary full bridge converter and a secondary full bridge converter associated with the battery to control bi-directional wireless power transfer between the grid, a grid load connected thereto, and the battery;
• operating the primary full bridge converter and the secondary full bridge converter at a relative phase angle (θ) to direct power flow to or from the battery, with the relative phase angle (θ) being a relative phase angle between respective voltages produced by the primary and secondary full bridge converters;
• and
• wirelessly charging the battery.