Invention Grant
US07711439B2 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
- Patent Title: Microcontroller methods of improving reliability in DC brushless motors and cooling fans
- Patent Title (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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Application No.: US11744132Application Date: 2007-05-03
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Publication No.: US07711439B2Publication Date: 2010-05-04
- Inventor: Scott Frankel , Eric Hardt , Nigel D. Strike
- Applicant: Scott Frankel , Eric Hardt , Nigel D. Strike
- Applicant Address: JP
- Assignee: Minebea Co., Ltd.
- Current Assignee: Minebea Co., Ltd.
- Current Assignee Address: JP
- Agency: Townsend and Townsend and Crew LLP
- Main IPC: G05B11/01
- IPC: G05B11/01 ; G05B15/00 ; G01C17/38 ; G01L27/00 ; G01K1/08 ; H05K7/20
Abstract:
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.
Public/Granted literature
- US20070219756A1 Microcontroller Methods of Improving Reliability in DC Brushless Motors and Cooling Fans Public/Granted day:2007-09-20
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