-
公开(公告)号:US20070047927A1
公开(公告)日:2007-03-01
申请号:US11238373
申请日:2005-09-29
申请人: Mark Collins , Sumner Marshall
发明人: Mark Collins , Sumner Marshall
IPC分类号: H02P7/06
CPC分类号: F04D29/663 , F04D27/004
摘要: A system and method for reducing fan noise by controlling the drive current to the fan motor. In one embodiment the system approximates a linear drive using a number of transistors in parallel and sequentially deploying the transistors. In another embodiment, a scheme is used to activate and deactivate transistors in discrete steps thereby achieving the benefits of the linear controller topology.
摘要翻译: 通过控制风扇电机的驱动电流来减少风扇噪声的系统和方法。 在一个实施例中,系统使用并联的多个晶体管并且依次配置晶体管来近似线性驱动。 在另一个实施例中,使用一种方案来以离散步骤激活和去激活晶体管,从而实现线性控制器拓扑的优点。