Power architecture for a vehicle such as an off-highway vehicle

A power distribution architecture for an off-road vehicle, the power distribution architecture comprising:

• a work circuit including a plurality of motion control units configured to be fluidly connected to separate hydraulic actuators, the motion control units each including an electric motor/generator mechanically coupled to a pump/motor;
• an electrical bus for providing electrical power to each of the electric motors/generators;
• a common pressure rail for providing hydraulic power to each of the motion control units;
• and
• a prime mover which drives an electric generator for providing electrical power to a motor drive of an electric traction motor of a propel circuit of the vehicle, wherein the prime mover also is coupled by a mechanical power take-off to a pump for pressuring the common pressure rail, wherein the motor drive is configured to direct a DC output along a DC power line to a power distribution unit, wherein the power distribution unit electrically connects the DC power line to the electrical bus and provides DC-DC power conversion such that the DC electrical bus has a lower DC voltage than the DC power line, and wherein the power distribution unit allows for bi-directional electrical power transfer between the DC power line and the DC electrical bus.

A power distribution architecture for an off-road vehicle, the power distribution architecture comprising:

• a work circuit including a plurality of motion control units configured to be fluidly connected to separate hydraulic actuators, the motion control units each including an electric motor/generator mechanically coupled to a pump/motor;
• an electrical bus for providing electrical power to each of the electric motors/generators;
• a common pressure rail for providing hydraulic power to each of the motion control units;
• and
• a prime mover which drives an electric generator for providing electrical power to a motor drive of an electric traction motor of a propel circuit of the vehicle, wherein the motor drive is configured to direct a DC output along a DC power line to a power distribution unit, wherein the power distribution unit electrically connects the DC power line to the electrical bus and provides DC-DC power conversion such that the electrical bus has a lower DC voltage than the DC power line, wherein the power distribution unit allows for bi-directional electrical power transfer between the DC power line and the DC electrical bus, and wherein the DC power line powers an electric pump/motor for pressurizing the common pressure rail.