公开(公告)号：US20060103334A1

公开(公告)日：2006-05-18

申请号：US10989866

申请日：2004-11-16

申请人： Bulent Abali ,  D. Guthridge ,  Richard Harper ,  Peter Manson ,  Harry Marr

发明人： Bulent Abali ,  D. Guthridge ,  Richard Harper ,  Peter Manson ,  Harry Marr

IPC分类号： H02P7/08

CPC分类号： F04D29/665 ,  F04D25/166

摘要： A multi-fan apparatus and method incorporates mutual active cancellation of fan noise and/or vibrations. The multi-fan apparatus includes two or more fans circuits, each comprising a fan, a fan speed controller and a separate tachometer, and a fan phase controller. The phase controller is connected to at least one fan speed controller and to each tachometer. Each fan's speed is independently and dynamically maintained at the same set speed by the fan speed controllers using an independent control loops. A noise and/or vibration cancellation phase difference between fans is determined in order to achieve destructive interference of pressure waves and, thus, noise and/or vibration reduction, in pre-determined region of a system incorporating the multi-fan apparatus. The phase controller establishes and maintains this cancellation phase difference between the fans based upon feedback from the tachometers.

摘要翻译： 多风扇装置和方法包括风扇噪声和/或振动的相互主动消除。 多风扇装置包括两个或更多个风扇电路，每个风扇电路包括风扇，风扇速度控制器和单独的转速计，以及风扇相位控制器。 相位控制器连接至至少一个风扇转速控制器和每个转速计。 每个风扇的速度由风扇速度控制器使用独立的控制回路以相同的设定速度独立且动态地维护。 确定风扇之间的噪声和/或振动消除相位差，以便在包含多风扇装置的系统的预定区域中实现压力波的相消干扰，从而实现噪声和/或减振。 相位控制器基于来自转速计的反馈建立并维持风扇之间的这种消除相位差。