发明授权
- 专利标题： Motor drive device and electronic device using the same
- 专利标题（中）： 电动机驱动装置及使用其的电子装置
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申请号： US11995026申请日： 2006-07-11
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公开(公告)号： US07848066B2公开(公告)日： 2010-12-07
- 发明人: Daiki Yanagishima
- 申请人： Daiki Yanagishima
- 申请人地址： JP Kyoto
- 专利权人： Rohm Co., Ltd.
- 当前专利权人： Rohm Co., Ltd.
- 当前专利权人地址： JP Kyoto
- 代理机构： Fish & Richardson P.C.
- 优先权： JP2005-202414 20050712; JP2006-128931 20060508
- 国际申请： PCT/JP2006/313749 WO 20060711
- 国际公布： WO2007/007742 WO 20070118
- 主分类号： H02H7/08
- IPC分类号： H02H7/08
摘要：
A motor drive device includes: chopping signal generation means for generating a chopping signal Sa when drive current of a driver has reached a first threshold value; chopping signal cut-off means for cutting off the chopping signal Sa when the drive current has reached a second threshold value which is greater than the first threshold value; and overcurrent protection means for generating an overcurrent protection signal Se when the drive current has reached a third threshold value which is greater than the first threshold value and its continuation time has reached a predetermined threshold value time. Thus it is possible to simultaneously obtain the constant current chopping function and the overcurrent protection function and to improve its reliability and safety.
公开/授权文献
- US20100117577A1 Motor Drive Device and Electronic Device Using the Same 公开/授权日：2010-05-13
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