Invention Grant
- Patent Title: Method and apparatus for electric motor torque monitoring
- Patent Title (中): 电动机转矩监测方法及装置
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Application No.: US11853113Application Date: 2007-09-11
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Publication No.: US07755310B2Publication Date: 2010-07-13
- Inventor: Stephen T. West , Wei D. Wang , Sean E Gleason
- Applicant: Stephen T. West , Wei D. Wang , Sean E Gleason
- 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: H02P21/00
- IPC: H02P21/00

Abstract:
Methods and apparatus are provided for monitoring an achieved motor torque produced by an electric motor. The method includes determining the achieved motor torque based on a rotor position of the electric motor and a phase current of the electric motor when the motor speed is not greater than a first pre-determined threshold, determining the achieved motor torque based on a loss-compensated power supplied to the electric motor when the motor speed is greater than the first pre-determined threshold, comparing the achieved motor torque with the torque command, and indicating a fault when the achieved motor torque is not within a pre-determined margin of the torque command.
Public/Granted literature
- US20090066281A1 METHOD AND APPARATUS FOR ELECTRIC MOTOR TORQUE MONITORING Public/Granted day:2009-03-12
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