发明申请
US20090324276A1 FAN DRIVE APPARATUS AND IMAGE FORMING APPARATUS HAVING FAN DRIVE APPARATUS
有权
风扇驱动装置和具有风扇驱动装置的图像形成装置
- 专利标题： FAN DRIVE APPARATUS AND IMAGE FORMING APPARATUS HAVING FAN DRIVE APPARATUS
- 专利标题（中）： 风扇驱动装置和具有风扇驱动装置的图像形成装置
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申请号： US12489047申请日： 2009-06-22
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公开(公告)号： US20090324276A1公开(公告)日： 2009-12-31
- 发明人: Toshifumi Kakutani
- 申请人： Toshifumi Kakutani
- 申请人地址： JP Tokyo
- 专利权人： CANON KABUSHIKI KAISHA
- 当前专利权人： CANON KABUSHIKI KAISHA
- 当前专利权人地址： JP Tokyo
- 优先权： JP2008-171734 20080630
- 主分类号： G03G21/20
- IPC分类号： G03G21/20 ; H02P5/46
摘要：
A fan drive apparatus includes a first fan, a second fan configured to form an air flow space, which has an intake side and an exhaust side, in cooperation with the first fan, a first drive circuit and a second drive circuit configured to output drive voltages to drive the first fan and the second fan respectively, a current detection unit configured to detect a drive current for the second drive circuit when the first fan and the second fan are driven, and a control unit configured to control the second drive circuit to change the drive voltage applied to the second fan, and determine a drive voltage so that a variation amount of the drive current detected by the current detection unit with respect to a change of the drive voltage is equal to or less than a predetermined value.
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