Patent ID: 8080973
Filing Date: 2011-12-20
Classification: B60L,H02J,H02M,Y02T,Y10S,Y10T

Abstract:
1. A motor drive circuit comprising: a first energy storage device configured to supply electrical energy; a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, wherein the bi-directional DC-to-DC voltage converter comprises a first bi-directional buck/boost converter; a voltage inverter coupled to the bi-directional DC-to-DC voltage converter; a second energy storage device configured to supply electrical energy to the voltage inverter; a second bi-directional buck/boost converter coupled to the first bi-directional buck/boost converter, wherein the first and second bi-directional buck/boost converters are configured to modulate a voltage for charging the second energy storage device; an input device configured to receive electrical energy from an external energy source; and a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter, the coupling system having a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and having a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.