发明授权
US07305316B2 Microcontroller methods of improving reliability in DC brushless motors and cooling fans
有权
提高直流无刷电机和冷却风扇可靠性的微控制器方法
- 专利标题： Microcontroller methods of improving reliability in DC brushless motors and cooling fans
- 专利标题（中）： 提高直流无刷电机和冷却风扇可靠性的微控制器方法
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申请号： US11021385申请日： 2004-12-23
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公开(公告)号： US07305316B2公开(公告)日： 2007-12-04
- 发明人: Scott Frankel , Eric Hardt , Nigel D. Strike
- 申请人： Scott Frankel , Eric Hardt , Nigel D. Strike
- 申请人地址： JP Tokyo
- 专利权人： Minebea Co., Ltd.
- 当前专利权人： Minebea Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Townsend and Townsend and Crew LLP
- 主分类号： G05D23/00
- IPC分类号： G05D23/00 ; G05B5/00 ; G06F1/20 ; H05K7/20 ; H05K5/00
摘要：
A method of controlling a motor speed for a fan assembly includes receiving a duty cycle value at a microcontroller. The microcontroller receives a measured fan speed from a speed sensor. An expected fan speed is determined, where the expected fan speed corresponds to the duty cycle value. The measured fan speed is compared with the expected fan speed. A duty cycle of a motor driving signal is reduced if the measured fan speed is less than a predetermined fraction of the expected fan speed.
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