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首页> 外文会议>AMD-vol.257; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20061105-10; Chicago,IL(US) >MODELING OF EDDY CURRENT DAMPER COMPOSED OF SPHERICAL MAGNET AND CONDUCTING SHELL
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MODELING OF EDDY CURRENT DAMPER COMPOSED OF SPHERICAL MAGNET AND CONDUCTING SHELL

机译：球形磁铁和导电壳组成的涡流阻尼器的建模

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If a conducting plate moves through a nonuniform magnetic field, eddy currents are induced in the conducting plate. The eddy currents produce a magnetic force of drag, known as Fleming's left-hand rule. This rule means that a magnetic field perpendicular to the direction of movement generates a magnetic damping force. We have fabricated the eddy current damper composed of the spherical magnet and the conducting shell. The spherical magnet produces the axisymmetric magnetic field, and the shape of the conducting shell appears to combine a semispherical shell conductor and a cylinder conductor. When the eddy current damper works, the conducting shell is fixed in space, and the spherical magnet moves under the conducting shell. In this case, since there are magnetic flux densities perpendicular to the direction of movement, eddy currents flow inside the conducting shell, and then a magnetic force is produced. The reaction force of this magnetic force acts on the spherical magnet. In our study, eddy current dampers composed of a magnet and a conducting plate have been modeled using infinitesimal loop coils. As a result, magnetic damping forces are obtained. Our modeling has three merits as follows: the equation of a magnetic damping force is simple in the equation, we can use the static magnetic field obtained using FEM, the Biot-Savart law or experiments and the equation automatically satisfies boundary conditions using infinitesimal loop coils. In this study, we explain simply the principle of this method, and model an eddy current damper composed of a spherical magnet and a conducting shell. The analytical results of the modeling agree well with the experimental results.
机译：如果导电板在不均匀的磁场中移动，则会在导电板中感应出涡流。涡流产生阻力的磁力，即弗莱明的左手定则。该规则意味着垂直于运动方向的磁场会产生磁阻尼力。我们制造了由球形​​磁铁和导电壳组成的涡流阻尼器。球形磁体产生轴对称磁场，并且导电壳的形状似乎结合了半球形壳导体和圆柱导体。当涡流阻尼器工作时，导电壳固定在空间中，球形磁铁在导电壳下方移动。在这种情况下，由于存在垂直于运动方向的磁通量密度，因此涡流在导电壳体内部流动，然后产生磁力。该磁力的反作用力作用在球形磁铁上。在我们的研究中，已经使用无限小环形线圈对由磁体和导电板组成的涡流阻尼器进行了建模。结果，获得了磁阻尼力。我们的模型具有以下三个优点：方程中的磁阻尼力方程很简单，我们可以使用通过FEM，Biot-Savart定律或实验获得的静磁场，并且该方程使用无限小环形线圈自动满足边界条件。在这项研究中，我们将简单解释该方法的原理，并对由球形磁铁和导电壳体组成的涡流阻尼器进行建模。建模的分析结果与实验结果吻合良好。

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