This paper provides a walkthrough for the design of an AC-DC converter with an inductive magnetic field harvesting source and the controls to support it. The controls are specialized around a secondary coil used for MPPT (maximum power point tracking) measurements, unique to this project. Examples are shown on how to achieve maximum power transfer without the ability to measure the real input voltage due to the inductive load. The device is designed to work within an enclosed medium voltage AC drive, harvesting power from the high magnetic fields present from the input filters.