System and method for electric machine peak power management
AssigneeDana Belgium N.V.
InventorsJerome Janssens, Bert Hannon, Christophe De Buyser, Koen B. Seynaeve, Kevin Vyncke
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Abstract
Methods and systems for controlling a maximum power output of an electric propulsion system are described. In one example, a state machine generated from executable instructions controls a maximum power output of an electric propulsion systems. The state machine permits additions states and changes to conditions that facilitate transitioning between the various states without having to completely reconstruct the maximum power output method.
Claims19
An electric propulsion system, comprising:
- an electric machine;
- an inverter electrically coupled to the electric machine;
- and
- one or more controllers including executable instructions that cause the one or more controllers to generate a state machine configured to control maximum power output of the electric propulsion system, where the state machine is in exactly one of a plurality of states at a time, where transitions between the plurality of states occur automatically based on vehicle operating conditions, and where the plurality of states include at least one state that permits output power of the electric propulsion system to exceed a rated output power of at least one component of the electric propulsion system and at least one state that permits output power of at least one component of the electric propulsion system to be constrained to less than the rated output power of the at least one component.
A method for operating a vehicle, comprising:
- moving, via a controller, a state of a state machine between a plurality of states to control a maximum power output of an electric propulsion system, where the state machine includes the plurality of states and permits entry to exactly one state at a time, where each state within the plurality of states is automatically entered according to vehicle operating conditions including temperature compared to temperature thresholds.
A method for operating a vehicle, comprising:
- constraining a driver demand torque or power for a vehicle propulsion system by limiting an amount of electric current supplied to the vehicle propulsion system in response to moving between states of a state machine, to control a maximum torque or power output of an electric propulsion system via the state machine, where the state machine includes a plurality of states and permits entry to exactly one state at a time, where transitions between the plurality of states occur automatically based on vehicle operating conditions and where constraining the driver demand torque or power includes adjusting a maximum commanded driver demand torque or power by outputting a maximum threshold value for the torque or power.
Dependencies are inferred from the claim text.