Patent ID: 8198845

Claim:
A method to use an electric motor coil as inductor of a DC-to-DC converter comprising the following steps: (1) providing an electric motor having a coil, an H-bridge motor control, two diodes, a supply voltage, a load, and a capacitor, wherein the capacitor is arranged in parallel to the load; (2) increasing the current through said coil via a modulated switch in ON-state of said H-bridge; (3) transferring the energy accumulated in the coil during the On-state of the modulated switch to the capacitor during OFF state of said modulated switch; (4) applying the total voltage across said capacitor to the load, wherein said voltage is higher than the supply voltage; and (5) continuing modulating the switch causing storing energy in the coil and transferring subsequently the energy from the coil to the capacitor as long as the output voltage across the capacitor is required.