Modular stacked DC architecture traction system and method of making same

摘要

A modular stacked DC architecture for traction system includes a propulsion system includes an electric drive, a direct current (DC) link electrically coupled to the electric drive, and a first DC-DC converter coupled to the DC link. A first energy storage device (ESD) is electrically coupled to the first DC-DC converter, and a second DC-DC converter is coupled to the DC link and to the first DC-DC converter. The system also includes a second energy storage device electrically coupled to the second DC-DC converter and a controller coupled to the first and second DC-DC converters and configured to control a transfer of energy between the first ESD and the DC link via the first and second DC-DC converters.

主权项

1. A propulsion system comprising:
an electric drive; a direct current (DC) link electrically coupled to the electric drive, the DC link having a first bus and a second bus; a first DC-DC converter coupled to the DC link; a first energy storage device (ESD) electrically coupled to the first DC-DC converter; a second DC-DC converter coupled to the DC link and to the first DC-DC converter; a second energy storage device electrically coupled to the second DC-DC converter; and a controller coupled to the first and second DC-DC converters and configured to control a transfer of energy between the first ESD and the DC link via the first and second DC-DC converters; and wherein the controller is further configured to control a transfer of energy between the second ESD and the DC link via the first and second DC-DC converters; and wherein the first DC-DC converter is directly coupled to the first bus of the DC link and coupled to the second bus of the DC link through the second DC-DC converter absent a connection that bypasses the second DC-DC converter.