Patent ID: 8909405

Claim:
A device for operating a drivetrain which includes an electrical machine configured to be selectively operated as at least one of a generator and a motor, the electrical machine being electrically coupled to a power battery, the device comprising: an energy management unit connected to the power battery; an electrical machine management unit; and a powertrain management unit configured for transmitting a desired mechanical torque to the electrical machine management unit, wherein the powertrain management unit is distinct from the energy management unit; wherein the energy management unit is configured for transmitting at least one of a desired electric power, a lower electrical limit, and an upper electrical limit to the electrical machine management unit, and wherein the electrical machine management unit is configured for controlling the electrical machine to generate the desired mechanical torque, and wherein the electrical machine management unit is configured for transmitting at least one of a desired mechanical torque, a lower mechanical limit, and an upper mechanical limit to the powertrain management unit, and wherein the mechanical setpoint torque is determined on the basis of at least one of the desired mechanical torque, the upper mechanical limit, and the lower mechanical limit, and wherein the desired mechanical torque is determined from the desired electric power.