Controlling torque ripple in interior permanent magnet machines
AssigneeFord Global Technologies, LLC
InventorsFranco Leonardi, Dean Richard Canini, Michael W. Degner
Life of this patent
Estimating the term…
Abstract
A system for controlling a vehicle, the vehicle including a permanent magnet (PM) synchronous motor, includes a controller. The controller is configured to control the motor with a motor current. In the presence of a predetermined condition, the motor current results in increased winding loss and reduced torque ripple with respect to optimal motor current for minimal winding loss.
Claims20
A system for controlling a vehicle including a permanent magnet (PM) synchronous motor, the system comprising a controller configured to:
- control the motor with a motor current and, in the presence of a predetermined condition, alter a control angle of the motor current to increase winding loss and reduce torque ripple with respect to an optimal control angle of the motor current for minimal winding loss.
A method of controlling a vehicle including a permanent magnet (PM) synchronous motor comprising:
- controlling the motor based on d-axis and q-axis current commands Id and Iq, respectively, corresponding to a torque command;
- and
- in the presence of a predetermined condition, altering a control angle defined by Id and Iq to increase winding loss and reduce torque ripple relative to an optimal control angle for minimal winding loss.
A system for controlling a vehicle including a permanent magnet (PM) synchronous motor, the system comprising a controller configured to:
- control the motor based on d-axis and q-axis current commands Id and Iq, respectively, corresponding to a torque command;
- and
- in the presence of a predetermined condition, alter a control angle defined by Id and Iq to increase winding loss and reduce torque ripple relative to an optimal control angle for minimal winding loss.
Dependencies are inferred from the claim text.