Electrical power supply system and process

An electrical power supply system, including:

• at least one virtual air gap transformer, including at least one primary winding, at least one secondary winding, and one or more control windings to control the electromagnetic coupling between the primary and secondary windings, wherein the virtual air gap transformer is configured to saturate a region of an electromagnetic core of the at least one virtual air gap transformer to control electromagnetic coupling between the primary and secondary windings, a size of the saturated region determined by electrical current flowing through the one or more control windings;
• a heterodyning component configured to receive a signal including a first fundamental frequency and to generate a corresponding heterodyned signal having frequency components corresponding to a sum and a difference of the first fundamental frequency and a reference frequency;
• a filtering component configured to filter a heterodyned signal to remove one of the sum and the difference frequency components therefrom and provide a corresponding filtered signal;
• an input port configured to receive a first input signal including a first input fundamental frequency and a first input voltage;
• and
• a control component configured:
• (i) to receive a signal representing at least the first input fundamental frequency of the first input signal and to generate a corresponding frequency control signal to determine a reference frequency of the heterodyning component such that the filtered signal has a target output frequency;
• and
• (ii) to receive a signal representing the first input voltage, and to generate a corresponding virtual air gap control signal to determine the electrical current in the control windings of the at least one virtual air gap transformer, such that a target output voltage is generated at the secondary windings;
• wherein the electrical power supply system is configured to receive input electrical energy in the form of the first input signal including the first input fundamental frequency and the first input voltage, and to generate corresponding output electrical energy in the form of a corresponding first output signal of the target frequency and the target output voltage.