发明授权
- 专利标题： Electric motor drive apparatus and motor-driven power steering system
- 专利标题（中）： 电动机驱动装置和电动助力转向系统
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申请号： US10839153申请日： 2004-05-06
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公开(公告)号： US07164248B2公开(公告)日： 2007-01-16
- 发明人: Jirou Hayashi
- 申请人： Jirou Hayashi
- 申请人地址： JP Kariya
- 专利权人： Denso Corporation
- 当前专利权人： Denso Corporation
- 当前专利权人地址： JP Kariya
- 代理机构： Posz Law Group, PLC
- 优先权： JP2003-133671 20030512
- 主分类号： H02P7/00
- IPC分类号： H02P7/00 ; B62D5/04
摘要：
In an electric motor drive apparatus capable of reliably preventing adverse effects on an electric motor, when a control force detected by a torque sensor exceeds a predetermined value, a temperature storing unit stores a temperature detected by a thermistor at that time, and a deviation calculating unit calculates a deviation between the next temperature detected by the thermistor and the temperature stored in the temperature storing unit. When the calculated deviation exceeds a predetermined value, a current limit decision unit sends a limit signal to a current limiting unit. Upon receipt of the limit signal, the current limiting unit gradually decreases the upper limit value of current flowing in the electric motor at a predetermined time interval.