Torque ripple compensation in a motor control system
AssigneeCummins Inc.
InventorsAkm Arafat, Bradford K.O. Palmer, S. Dakshina Murthy-Bellur, Minyu Cai
Life of this patent
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Abstract
A method for operating a motor control system to dynamically compensate for low-frequency and/or high-frequency torque ripple. Embodiments include receiving an input command, receiving drive feedback signals representative of drive currents in a motor, identifying harmonics in the drive feedback signals representative of motor torque ripple, producing torque ripple compensation signals based on the identified harmonics; and producing motor drive control signals based on the input command, the current feedback signals, the torque ripple compensation signals, and carrier signals with a certain phase shift.
Claims19
A method for operating a motor control system, comprising:
- receiving an input command;
- receiving drive feedback signals representative of drive currents in a motor;
- identifying harmonics in the drive feedback signals representative of motor torque ripple;
- producing torque ripple compensation signals based on the identified harmonics;
- and
- producing motor drive control signals based on the input command, the current feedback signals and the torque ripple compensation signals.
A motor control system, comprising:
- one or more processors;
- and
- a program memory coupled to the one or more processors and storing executable instructions that when executed by the processors cause the computer system to:
- receive an input command;
- receive drive feedback signals representative of drive currents in a motor;
- identify harmonics in the drive feedback signals representative of motor torque ripple;
- produce torque ripple compensation signals based on the identified harmonics;
- and
- produce motor drive control signals based on the input command, the current feedback signals and the torque ripple compensation signals.
Dependencies are inferred from the claim text.