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11 条记录 (耗时 0.01 秒)

    Method and apparatus for controlling a magnetic bearing
    1.
    发明公开
    Method and apparatus for controlling a magnetic bearing 失效
    Verfahren undGerätzur Steuerung eines Magnetlagers。

    公开(公告)号：EP0560234A2

    公开(公告)日：1993-09-15

    申请号：EP93103611.5

    申请日：1993-03-05

    申请人： HITACHI, LTD.

    发明人： Matsushita, Osami ,  Yoneyama, Mitsuho ,  Takahashi, Naohiko ,  Fukushima, Yasuo ,  Hiroshima, Minoru ,  Kaneki, Tadashi ,  Abe, Yoshiaki ,  Sakanashi, Naofumi

    IPC分类号： F16C39/06

    CPC分类号： F16C32/0453 ,  F16C32/048

    摘要： A controller of a magnetic bearing controls the rotor speed with a reduced drive current while suppressing rotor vibrations. In addition to the basic Proportional, Integral and Derivative (PID) control (4X,4Y), the controller implements further control methods to ensure the stable operation of the rotor, even at rotor resonance frequencies. An automatic balancing system ("ABS", gainβ) is applied in conjunction with at least one of: N-cross control system (cross coupling, synchronous with rotor speed, gainα); N-straight control (no cross-coupling, but synchronous, gainδ); Feed Forward (FF, gainγ) control where a control current is applied to generate vibrations equal and opposite to those created by the rotor. A computer (20) in the controller determines the activation of each control method in accordance with a predetermined control plan in response to the detected rotor speed by varying the control parameters α, β, γ, δ.

    摘要翻译： 磁轴承的控制器在抑制转子振动的同时以减小的驱动电流来控制转子速度。 除了基本的比例，积分和微分（PID）控制（4X，4Y）之外，控制器还实现了进一步的控制方法，以确保转子的稳定运行，即使在转子谐振频率。 自动平衡系统（“ABS”，增益β）与以下中的至少一个结合使用：交叉控制系统（交叉耦合，与转子速度同步，增益α）; N直线控制（无交叉耦合，但同步，增益增量）; 前馈（FF，增益伽马）控制，其中施加控制电流以产生与转子产生的振动相等和相反的振动。 控制器（20）通过改变控制参数α，β，γ，δ来响应于检测到的转子速度，根据预定的控制计划确定每个控制方法的激活。

    Method and apparatus for controlling a magnetic bearing
    2.
    发明公开
    Method and apparatus for controlling a magnetic bearing 失效
    用于控制磁性轴承的方法和装置

    公开(公告)号：EP0560234A3

    公开(公告)日：1993-12-01

    申请号：EP93103611.5

    申请日：1993-03-05

    申请人： HITACHI, LTD.

    发明人： Matsushita, Osami ,  Yoneyama, Mitsuho ,  Takahashi, Naohiko ,  Fukushima, Yasuo ,  Hiroshima, Minoru ,  Kaneki, Tadashi ,  Abe, Yoshiaki ,  Sakanashi, Naofumi

    IPC分类号： F16C39/06

    CPC分类号： F16C32/0453 ,  F16C32/048

    摘要： A controller of a magnetic bearing controls the rotor speed with a reduced drive current while suppressing rotor vibrations. In addition to the basic Proportional, Integral and Derivative (PID) control (4X,4Y), the controller implements further control methods to ensure the stable operation of the rotor, even at rotor resonance frequencies. An automatic balancing system ("ABS", gainβ) is applied in conjunction with at least one of: N-cross control system (cross coupling, synchronous with rotor speed, gainα); N-straight control (no cross-coupling, but synchronous, gainδ); Feed Forward (FF, gainγ) control where a control current is applied to generate vibrations equal and opposite to those created by the rotor. A computer (20) in the controller determines the activation of each control method in accordance with a predetermined control plan in response to the detected rotor speed by varying the control parameters α, β, γ, δ.

    Rotary fluid machine
    3.
    发明公开
    Rotary fluid machine 失效
    旋转流量计

    公开(公告)号：EP0154673A3

    公开(公告)日：1986-12-17

    申请号：EP84109444

    申请日：1984-08-08

    申请人： HITACHI, LTD.

    发明人： Mori, Hidetomo ,  Matsushita, Osami ,  Matsubara, Katsumi ,  Ida, Michiaki ,  Sasaki, Shigeru

    IPC分类号： F04C18/14

    CPC分类号： F01C21/02 ,  F16C27/00 ,  F16C27/04 ,  F16C2360/43

    摘要： The present invention concerns a rotary fluid machine, such as a screw compressor, a centrifugal compressor or a pump, which is provided with a thrust bearing mounting unit which is capable of keeping the natural frequencies of bending vibration of rotors (1, 2) thereof within ranges of permissible values. To provide such a mounting unit (11), the axial rigidity thereof is made to be at least as high as that of the thrust bearings (6, 7), and its radial rigidity is made to be not more than half that thereof, When a radial load is applied to the thrust bearings (6, 7), the bearing mounting unit thus formed is deformed in substantially the radial direction alone, and the thrust bearings bear substantially no radial load.

    摘要翻译： 本发明涉及一种旋转流体机械，例如螺杆式压缩机，离心式压缩机或泵，其设置有能够保持其转子（1,2）的弯曲振动的固有频率的推力轴承安装单元 在允许值的范围内。 为了提供这样的安装单元（11），其轴向刚性至少与推力轴承（6,7）的刚度一样高，并且其径向刚度不大于其一半。当 径向载荷被施加到推力轴承（6,7）上，这样形成的轴承安装单元基本上仅沿径向方向变形，推力轴承基本上不承受径向载荷。

    Rotary fluid machine
    4.
    发明公开
    Rotary fluid machine 失效
    Rotationsströmungsmaschine。

    公开(公告)号：EP0154673A2

    公开(公告)日：1985-09-18

    申请号：EP84109444.4

    申请日：1984-08-08

    申请人： HITACHI, LTD.

    发明人： Mori, Hidetomo ,  Matsushita, Osami ,  Matsubara, Katsumi ,  Ida, Michiaki ,  Sasaki, Shigeru

    IPC分类号： F04C18/14

    CPC分类号： F01C21/02 ,  F16C27/00 ,  F16C27/04 ,  F16C2360/43

    摘要： The present invention concerns a rotary fluid machine, such as a screw compressor, a centrifugal compressor or a pump, which is provided with a thrust bearing mounting unit which is capable of keeping the natural frequencies of bending vibration of rotors (1, 2) thereof within ranges of permissible values. To provide such a mounting unit (11), the axial rigidity thereof is made to be at least as high as that of the thrust bearings (6, 7), and its radial rigidity is made to be not more than half that thereof, When a radial load is applied to the thrust bearings (6, 7), the bearing mounting unit thus formed is deformed in substantially the radial direction alone, and the thrust bearings bear substantially no radial load.

    摘要翻译： 本发明涉及一种旋转流体机械，例如螺杆式压缩机，离心式压缩机或泵，其具有能够保持其转子（1,2）的弯曲振动的固有频率的推力轴承安装单元 在允许值的范围内。 为了提供这种安装单元（11），其轴向刚度至少与推力轴承（6,7）的刚度一样高，并且其径向刚度不大于其一半的刚度 径向载荷被施加到推力轴承（6,7）上，所形成的轴承安装单元基本上仅沿径向方向变形，推力轴承基本上不承受径向载荷。

    A control apparatus for a rotor supported by an electromagnetic bearing
    10.
    发明公开
    A control apparatus for a rotor supported by an electromagnetic bearing 失效
    用于由电磁轴承支撑的转子的控制装置

    公开(公告)号：EP0201894A3

    公开(公告)日：1988-08-03

    申请号：EP86106410

    申请日：1986-05-12

    申请人： HITACHI, LTD.

    发明人： Matsushita, Osami ,  Takagi, Michiyuki ,  Yoneyama, Mitsuho ,  Sugaya, Toyomi

    IPC分类号： F16C39/06

    CPC分类号： F16C32/0453 ,  F16C32/048

    摘要： @ The present invention consists in lowering the resonance amplitude of the rotational frequency-synchronous unbalance vibration of a rotor supported by an electromagnetic bearing. To this end, the invention disposes an X-direction control servo circuit and a Y-direction control servo circuit each of which detects the deviation of the rotor from a desired position in the radial direction thereof and controls the rotor so as to be held at the desired position on the basis of the detection signal, and a tracking filter (7) which is synchronous with a rotational frequency. Outputs from the filter (7) are crossed to supply the Y-direction control servo circuit with the X-directional signal ( XN ) of the outputs and to supply the X-direction control servo circuit with the Y-directional signal (y N ).