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    Impeller for use in cooling dynamoelectric machine
    1.
    发明授权
    Impeller for use in cooling dynamoelectric machine 有权
    叶轮用于冷却电机

    公开(公告)号：US6139275A

    公开(公告)日：2000-10-31

    申请号：US359787

    申请日：1999-07-23

    Applicant: Shinichi Noda ,  Nobutake Aikura ,  Takuro Hayashi

    Inventor： Shinichi Noda ,  Nobutake Aikura ,  Takuro Hayashi

    IPC: F04D29/24 ,  F04D25/08 ,  F04D29/34 ,  F04D29/38 ,  F04D29/66 ,  H02K9/06 ,  H02K9/14

    CPC classification number: F04D29/666 ,  H02K9/14

    Abstract: An impeller used for cooling a dynamoelectric machine such as electric motors includes a disk and a plurality of blades arranged on the disk in a circle at unequal spaces so that a position angle .theta.n of an n-th blade is met by an equation:.theta.n=.theta.n0+.theta.max.times.sin {2.pi..times.m.times.(n-1)/Z}where Z is the number of the blades, .theta.n0 is a position angle defining a position of the n-th blade when the blades the number of which is shown by Z are arranged on the disk at equal spaces where 1.ltoreq.n.ltoreq.Z, .theta.max is a maximum allowable angular difference, and m is a degree of a rotational frequency and takes any integer from 1 to Z-1.

    Abstract translation: 用于冷却诸如电动马达的电动机的叶轮包括盘和多个叶片，以不相等的空间在圆盘上布置，使得第n个叶片的位置角度θn满足以下等式：θ n =θn0 +θmaxxsin {2 pi xmx（n-1）/ Z}其中Z是叶片的数量，θn0是限定第n个叶片的位置的位置角，当叶片的数量是 Z所示的Z被布置在磁盘上，其中1≤n≤Z，θmax是最大允许角度差，m是旋转频率的程度，并且取从1到Z-1的任何整数 。

    Three-dimension active silencer
    4.
    发明申请
    Three-dimension active silencer 审中-公开

    公开(公告)号：US20050084115A1

    公开(公告)日：2005-04-21

    申请号：US10972320

    申请日：2004-10-26

    Applicant: Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    Inventor： Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    IPC: A61F11/06 ,  G10K11/16 ,  G10K11/178 ,  H03B29/00

    CPC classification number: G10K11/178 ,  G10K2210/12822

    Abstract: A three-dimension active silencer includes a measuring unit for detecting a signal relating to a sound radiated from a target sound source which is located in a closed box. A plurality of additional sound sources are arranged around the target sound source. A microphone is arranged at a predetermined position for detecting a sound power at the position. A controller is adapted to control respective amplitudes of the additional sound sources which can be different from an amplitude of the target sound source and respective phases of the additional sound sources, based on the signal detected by the measuring unit, in such a manner that the microphone detects the lowest sound power. The additional sound sources are arranged in such a manner that a position xp of the target sound source, respective relative positions di (i=1, 2, . . . , N) of the N additional sound sources from the target sound source and a wave number k of the sound radiated from the target sound source can substantially satisfy the following expression. 1 N ⁢ ∑ i = 1 N ⁢   ⁢ cos ⁢   ⁢ k ⁡ ( x p - d i ) - cos ⁢   ⁢ k · x p ≅ 0 According to the feature, it can be achieved to reduce the total sound power in the closed box including the target sound source.

    Three-dimension active silencer
    6.
    发明授权
    Three-dimension active silencer 失效

    公开(公告)号：US06901147B1

    公开(公告)日：2005-05-31

    申请号：US09604904

    申请日：2000-06-28

    Applicant: Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    Inventor： Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    IPC: A61F11/06 ,  G10K11/16 ,  G10K11/178 ,  H03B29/00

    CPC classification number: G10K11/178 ,  G10K2210/12822

    Abstract: A three-dimension active silencer includes a measuring unit for detecting a signal relating to a sound radiated from a target sound source which is located in a closed box. A plurality of additional sound sources are arranged around the target sound source. A microphone is arranged at a predetermined position for detecting a sound power at the position. A controller is adapted to control respective amplitudes of the additional sound sources which can be different from an amplitude of the target sound source and respective phases of the additional sound sources, based on the signal detected by the measuring unit, in such a manner that the microphone detects the lowest sound power. The additional sound sources are arranged in such a manner that a position xp of the target sound source, respective relative positions di (i=1, 2, . . . , N) of the N additional sound sources from the target sound source and a wave number k of the sound radiated from the target sound source can substantially satisfy the following expression. 1 N ⁢   ⁢ ∑ i = 1 N ⁢   ⁢ cos ⁢   ⁢ k ⁢   ⁢ ( x p - d i ) - cos ⁢   ⁢ k · x p ≅ 0 According to the feature, it can be achieved to reduce the total sound power in the closed box including the target sound source.

    Active noise control apparatus
    7.
    发明授权
    Active noise control apparatus 失效
    主动噪声控制装置

    公开(公告)号：US06192133B1

    公开(公告)日：2001-02-20

    申请号：US08932176

    申请日：1997-09-17

    Applicant: Akihiko Enamito ,  Takuro Hayashi

    Inventor： Akihiko Enamito ,  Takuro Hayashi

    IPC: A61F1106

    CPC classification number: G10K11/178 ,  A61F2011/145

    Abstract: A speaker, serving as an additional sound source, is provided close to a noise source, two microphones are arranged on a central axis of a vibration surface of the speaker to be spaced from each other, acoustic intensity of the speaker is measured from outputs of these microphones, and an input to the speaker is controlled by a controller such that acoustic intensity, that is, acoustic power of the speaker is set to be zero or minimized.

    Abstract translation: 作为附加声源的扬声器靠近噪声源提供，在扬声器的振动表面的中心轴上布置两个麦克风以彼此间隔开，扬声器的声强度从 这些麦克风和扬声器的输入由控制器控制，使得扬声器的声学强度，即声音功率被设置为零或最小化。

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