Invention Grant
- Patent Title: Method and system for calibrating rotor position offset of an electric motor
- Patent Title (中): 校准电动机转子位置偏移的方法和系统
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Application No.: US13169429Application Date: 2011-06-27
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Publication No.: US08853979B2Publication Date: 2014-10-07
- Inventor: Long Wu , Robert Shaw
- Applicant: Long Wu , Robert Shaw
- Applicant Address: US IL Moline
- Assignee: Deere & Company
- Current Assignee: Deere & Company
- Current Assignee Address: US IL Moline
- Main IPC: H02P21/00
- IPC: H02P21/00 ; H02P6/20 ; H02P21/14

Abstract:
While enforcing a fake position in the data processing system and applying a zero direct-axis current command, positive and negative quadrature-axis current commands are applied sequentially and at approximately same magnitude to urge the rotor toward an enforced position. A processing module measures a positive quadrature-axis current aligned raw position data after application of the positive quadrature-axis current command and measures negative quadrature-axis current aligned raw position data for the rotor after application of the negative quadrature-axis command. An initial position offset calibrator or data processor determines a difference between the raw position data to determine an alignment of a true averaging axis. An initial position offset calibrator or data processor determines a raw averaging axis position data based on an average of the raw position data. An initial position offset calibrator or data processor determines a position offset based on a difference between the determined true averaging axis and the determined raw averaging axis position data.
Public/Granted literature
- US20120217912A1 METHOD AND SYSTEM FOR CALIBRATING ROTOR POSITION OFFSET OF AN ELECTRIC MOTOR Public/Granted day:2012-08-30
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