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1. 发明授权

US4832576A Electric fan 失效
标题翻译：电扇
公开(公告)号：US4832576A
公开(公告)日：1989-05-23
申请号：US866209
申请日：1986-05-22
申请人： Yutaka Deguchi , Hideo Momohara , Yasuyuki Tsuchida , Toshio Ootani , Yuji Nakanishi
发明人： Yutaka Deguchi , Hideo Momohara , Yasuyuki Tsuchida , Toshio Ootani , Yuji Nakanishi
IPC分类号： H02P6/08
CPC分类号： H02P6/08
摘要： An electric fan comprises a rotary shaft supported on a mounting base plate. The rotary shaft is extended through a cylindrical stator and on a tip of the rotary shaft, the bottom of a cup-shaped rotor yoke as well as an impeller are secured. The stator is enclosed in the rotor yoke, on whose inner wall an anisotropic rotor magnet magnetized in the reverse polarity alternately in its circumferential direction is secured. The stator and the rotor form a DC brushless motor, whereby the impeller is rotated through the rotation of the rotor and the rotary shaft. In the proximity of the rotor magnet, there is provided a hall integrated circuit (IC), through which a rotating position of the rotor may be detected. On the basis of the rotating position signal from the hall IC, a microcomputer controls the current flowing period in such a manner that the current flowing through the stator coil will partly overlap between each phase. A separate microcomputer adjusts the voltage applied to the DC brushless motor and controls the wind velocity.
摘要翻译：电风扇包括支撑在安装基板上的旋转轴。旋转轴通过圆柱形定子延伸并且在旋转轴的尖端上，杯状转子轭的底部以及叶轮被固定。定子被封闭在转子磁轭中，在其内壁上确保以相反极性在其圆周方向上交替地磁化的各向异性转子磁体。定子和转子形成DC无刷电动机，由此叶轮通过转子和旋转轴的旋转而旋转。在转子磁体附近，设置有可以检测转子旋转位置的霍尔集成电路（IC）。基于来自霍尔IC的旋转位置信号，微型计算机以这样的方式控制电流流动周期，使得流过定子线圈的电流将在每个相之间部分重叠。单独的微型计算机调节施加到直流无刷电机的电压并控制风速。

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