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US 2023/0421027 A1Published application
Rotor position-based ramp rate to reduce vehicle harshness during active discharge
AssigneeFord Global Technologies, LLC
InventorsJi Wu, Michael W. Degner, Wei Wu
Life of this patent
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Abstract
A controller, responsive to a signal indicating deactivation of a vehicle and disconnection of a traction battery from an inverter, generates a d-axis current command for the inverter having a ramp portion that defines a rate of change in current magnitude that depends on an electric angle between a rotor and stator of an electric machine.
Claims19
A vehicle comprising:
- an electric machine including a rotor and stator;
- an inverter;
- and
- a controller programmed to, responsive to a signal indicating deactivation of the vehicle, generate a d-axis current command for the inverter having a ramp portion that defines a rate of change in current magnitude that depends on an electric angle between the rotor and stator.
1 more element
A method comprising:
- responsive to a signal indicating a traction battery has been disconnected from an inverter, generating a d-axis current command for the inverter having a ramp portion that defines a rate of change in current magnitude that depends on an electric angle between a rotor and stator of an electric machine.
A power system for a vehicle comprising:
- a controller programmed to,
- responsive to a first signal indicating a first deactivation of the vehicle and disconnection of a traction battery from an inverter, generate a first d-axis current command for the inverter having a first ramp portion that defines a first rate of change in current magnitude, and
- responsive to a second signal indicating a second deactivation of the vehicle and disconnection of the traction battery from the inverter, generate a second d-axis current command for the inverter having a second ramp portion that defines a second rate of change in current magnitude different than the first rate of change in current magnitude.
Dependencies are inferred from the claim text.