发明申请
- 专利标题： METHOD AND APPARATUS FOR THERMALLY MONITORING A PERMANENT MAGNET ELECTRIC MOTOR
- 专利标题（中）： 用于永磁电机的热监测方法和装置
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申请号： US13151568申请日： 2011-06-02
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公开(公告)号： US20120306422A1公开(公告)日： 2012-12-06
- 发明人: Lei Hao , Yilu Zhang , Siwei Cheng
- 申请人： Lei Hao , Yilu Zhang , Siwei Cheng
- 申请人地址： US MI DETROIT
- 专利权人： GM GLOBAL TECHNOLOGY OPERATIONS LLC
- 当前专利权人： GM GLOBAL TECHNOLOGY OPERATIONS LLC
- 当前专利权人地址： US MI DETROIT
- 主分类号： G01R31/34
- IPC分类号： G01R31/34
摘要：
A method for determining a temperature of an electric motor including stator windings includes injecting an AC current into a D-axis current of a stator winding at a frequency that is synchronized with a control frequency of the electric motor, determining a DC-phase current, determining a resistance of the stator winding corresponding to the DC-phase current and an applied voltage, and determining a temperature of the electric motor as a function of the resistance of the stator winding.
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