Patent ID: 9025352
Filing Date: 2015-05-05
Classification: H02M,Y10T

Abstract:
1. An apparatus comprising: a transformer comprising a secondary winding configured to inductively couple to a primary winding when a current is passed through the primary winding from an energy source; a first rectifier coupled to the secondary winding and configured to rectify a first AC voltage from the secondary winding into a first DC voltage; a second rectifier coupled to the secondary winding and configured to rectify a second AC voltage from the secondary winding into a second DC voltage; a DC bus coupled to the first and second rectifiers and configured to receive the first and second DC voltages therefrom; an energy storage device configured to output a DC voltage and coupled to the DC bus; a bi-directional DC-to-AC voltage inverter coupled to the energy storage device and to the DC bus, wherein the bi-directional DC-to-AC voltage inverter comprises the second rectifier; an electromechanical device coupled to the bi-directional DC-to-AC voltage inverter; and a controller configured to control the bi-directional DC-to-AC voltage inverter to invert the DC voltage from the energy storage device into a third AC voltage suitable for energizing the electromechanical device; wherein the first AC voltage is higher than the second AC voltage; and wherein the first DC voltage is higher than the second DC voltage.