Invention Grant
- Patent Title: Harmonic torque ripple reduction at low motor speeds
- Patent Title (中): 低电机转速下的谐波转矩脉动降低
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Application No.: US12108868Application Date: 2008-04-24
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Publication No.: US07768220B2Publication Date: 2010-08-03
- Inventor: Steven E. Schulz , Goro Tamai , Silva Hiti
- Applicant: Steven E. Schulz , Goro Tamai , Silva Hiti
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations, Inc.
- Current Assignee: GM Global Technology Operations, Inc.
- Current Assignee Address: US MI Detroit
- Agency: Ingrassia Fisher & Lorenz, P.C.
- Main IPC: H02P6/10
- IPC: H02P6/10

Abstract:
Methods and systems are provided for reducing torque ripple in an electric motor. A method comprises receiving a torque command and determining a cancellation current command based on the torque command. The method further comprises generating a harmonic cancellation command based on the cancellation current command, wherein the harmonic cancellation command compensates for a phase shift and an attenuation introduced by a current regulated control module coupled to an inverter coupled to the electric motor. The method further comprises providing the harmonic cancellation command to the current regulated control module, wherein the current regulated control module is configured to control the inverter in response to the harmonic cancellation command and the torque command.
Public/Granted literature
- US20090267555A1 HARMONIC TORQUE RIPPLE REDUCTION AT LOW MOTOR SPEEDS Public/Granted day:2009-10-29
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