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US 2024/0239328 A1Published application
Electric machine speed dependent variable frequency pulsed torque control for electric machine
AssigneeFord Global Technologies, LLC
InventorsChris Wolf, Michael W. Degner, Yue Nie
Life of this patent
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Abstract
Systems and methods for commanding an electric drive system for an electric or hybrid vehicle are described. In one example, the drive system is commanded by a controller that supplies a pulsed torque command that varies in frequency as a function of electric machine speed when a driver of a vehicle requests a constant driver demand torque.
Claims20
A method for operating an electric drive system, comprising:
- generating a pulsed torque request that varies in frequency as a function of electric machine speed in response to a constant driver demand torque request;
- and
- generating a torque that on average corresponds to the constant driver demand torque request via an electric machine in response to the pulsed torque request.
A system, comprising:
- an electric drive system including an inverter and an electric machine;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to generate a pulsed torque request that varies in frequency with electric machine speed randomization.
A method for operating an electric drive system, comprising:
- generating a pulsed torque request that varies in frequency as a function of electric machine speed in response to a constant driver demand torque request, where the pulsed torque request switches between an actual total of two torque values while responding to the constant driver demand torque request;
- and
- generating a torque that on average corresponds to the constant driver demand torque request via an electric machine in response to the pulsed torque request.
Dependencies are inferred from the claim text.