Patent ID: 8897041

Claim:
A method of power conversion in a power converter having a voltage regulated capacitor and an unregulated voltage capacitor, the voltage regulated capacitor having a present voltage, the present voltage having a magnitude and a polarity, the method comprising the steps of: a. determining a target voltage, the target voltage having a magnitude and a polarity; b. determining the polarity of the present voltage and the polarity of the target voltage; and c. if the polarity of the present voltage matches the polarity of the target voltage, i. charging an inductor using a starting-side capacitor until the inductor has an initial target energy, wherein the starting-side capacitor is the voltage regulated capacitor if the magnitude of the present voltage is greater than the magnitude of the target voltage, or else the starting-side capacitor is the unregulated voltage capacitor, ii. disconnecting the starting-side capacitor from the inductor, and iii. discharging the inductor into an ending-side capacitor until the inductor has a final target energy, wherein the ending-side capacitor is the unregulated voltage capacitor if the magnitude of the present voltage is greater than the magnitude of the target voltage, or else the ending-side capacitor is the voltage regulated capacitor, and d. if the polarity of the present voltage does not match the polarity of the target voltage value, connecting an inductor to the voltage regulated capacitor until the present voltage has crossed zero and until the inductor has a final target energy.