Patent ID: 8591717

Claim:
A process to generate an alternating current and to provide an electrical current to a load, the electrical current composed of a direct current from a direct component and the alternating current from an alternating component, the process characterized in the following stages: a) providing the direct current from the direct component to the load; b) subtracting a portion of electrical current from the load during a first period of time; c) accumulating the subtracted electrical current in the alternating component during a second period of time; d) returning the accumulated electrical current to the load during a third period of time; and e) repeating the b), c) and d) stages periodically or semi-periodically to produce and provide the electrical current to the load without changing an average value of the direct current from the direct component, wherein the electrical current to the load is equal to a sum of the direct current from the direct component and the alternating current from the alternating component.