Systems and methods for providing unbalanced current control in onboard vehicle battery chargers

A method for providing unbalanced current control, the method comprising:

• receiving a first grid voltage measurement associated with a first electrical phase of a grid, a second grid voltage measurement associated with a second electrical phase of the grid, and a third grid voltage measurement associated with a third electrical phase of the grid;
• receiving a first current measurement associated with a first current of a first current controller, a second current measurement associated with a second current of a second current controller, and a third current measurement associated with a third current of a third current controller;
• determining whether the first current measurement, the second current measurement, and the third current measurement indicates that the first current, the second current, and the third current are balanced;
• in response to a determination that the first current, the second current, and the third current are balanced, determining a weight factor;
• receiving, from a voltage controller, a direct current voltage output measurement associated with a direct current link;
• determining a product of the direct current voltage output measurement, the weight factor, a first sine reference associated with the first grid voltage measurement, a second sine reference associated with the second grid voltage measurement, and a third sine reference associated with the third grid voltage measurement;
• generating a set of unbalanced current set points based on the product;
• and
• regulating the first current of the first current controller, the second current of the second current controller, and the third current of the third current controller using the set of unbalanced current set points.

An apparatus for providing unbalanced current control, the apparatus comprising:

• a controller configured to:
• determine whether a first current measurement associated with a first current of a first current controller, a second current measurement associated with a second current of a second current controller, and a third current measurement associated with a third current of a third current controller are balanced;
• in response to a determination that the first current, the second current, and the third current are balanced, determine a weight factor;
• determine a product of a direct current voltage output measurement associated with a direct current link, the weight factor, a first sine reference associated with a first grid voltage measurement associated with a first electrical phase of a grid, a second sine reference associated with a second grid voltage measurement associated with a second electrical phase of the grid, and a third sine reference associated with a third grid voltage measurement associated with a third electrical phase of the grid;
• generate a set of unbalanced current set points based on the product;
• and
• regulate the first current of the first current controller, the second current of the second current controller, and the third current of the third current controller using the set of unbalanced current set points.