查询词典 magnetic steel

Based on the function and reliability, the design principle for thepermanent magnetic bearing in rotating machine is put forward. FailureMode Effect and Criticality Analysis is studied for thepermanent magnetic bearing, and corresponding designs for magneticbearing are made to enhance the reliability. In addition, the main failuremode and failure causes are found by FMECA, it is found that theadditional alternate magnetic field within the machine causing thepermanent magnet to demagnetize is the main failure mode of thepermanent magnetic bearing in rotating machine.

本文提出了基于功能和可靠性的旋转机械永磁轴承的设计原理，对旋转机械永磁轴承进行了失效模式影响及危害度分析，并相应地提出可靠性设计措施，以提高永磁轴承的可靠性，同时通过FMECA找出了影响永磁轴承可靠性的主要失效模式及失效因素。

Calculated results showed that in the Ni2MnIn phase, the atomic orbital magnetic moment of Mn dominates the unit cell's magnetic moment, i. e., about 85% of the total magnetic moments of unit cells. The contribution of Ni to the total cell's magnetic moments is about 15%. As to the In atoms, they show a weak diamagnetism in both phases. In particular, the phase transformation of tetragonal martensite results in the decrease in Fermi energy of Ni2MnIn unit cells by 0.495 eV.

计算表明：四方马氏体相变导致Ni2MnIn元胞费米能下降0.495eV；Ni2MnIn结构中，In原子具有弱抗磁性，晶胞磁矩为Mn原子轨道磁矩所主导，约占元胞总轨道磁矩85%，Ni原子轨道磁矩贡献约占元胞总轨道磁矩15%。

With experience gained from the Finite Element method, a quasi-linear model based on the Magnetic Equivalent Circuit method has been used to obtain the static torque of the motor. Three types of magnetic tubes are employed in the model, and through the exchange principle of magnetic lines of force and magnetic equipotential line, the tube in which the flux distribution is non-uniform is applied to the model.

通过分析电机二维磁场分布和考虑电机特殊的电磁结构，提出了用三种磁通管单元来近似磁场分布，并借用磁力线和等磁位线互换的方法，将磁力线分布不均匀的磁通管引入到分析模型中，有效的处理了平动式啮合电动机中的磁场分布不均匀和磁路局部饱和，使分析模型得到简化并兼顾了求解精度。

It uses the rheological characteristics of liquid-magnetic abrasive tool to finish surface of parts. It has typical fluidness when there is no external magnetic field around it. But when a strong magnetic field is applied, the viscosity of liquid-magnetic abrasive tool will increase quickly, and it will show the characteristics that resemble to solid.

该技术是利用液体磁性磨具的流变特性来实现对零件表面光整加工的，液体磁性磨具在没有外部磁场的情况下表现为一般的流体状态，具有良好的流动性，而一旦施加外部磁场它的粘度会迅速增加，表现出类似固体的特性，这就是液体磁性磨具的流变性。

In this system,the VVVF(variable voltage variable frequency) control method based on magnetic flux trajectory is applied.In the system,it is the target for the magnetic flux linkage polygon to be greatly approximate to the ideal magnetic flux circle.Considering such limitations as the low speed torque ripple,high speed real time and the working frequency of switching element,through the subsection synchronization control method by applying different numbers of magnetic flux linkage polygon for different frequency range,the perfect precision specifications for speed can be obtained.

系统采用基于磁通轨迹法的他控式变频调速方案，以磁链多边形尽量逼近理想磁通圆为目标，并考虑低速转矩脉动、高速实时性和开关元件的工作频率限制等约束条件，通过采用分段同步控制方式，在不同的频段采用不同的磁链多边形边数，使系统获得了优异的转速精度指标。

Week 12 Magnetic induction intensity, magnetic flux, Gauss theorem of magnetic field, Biot-Savar law, magnetic field of moved charge.

第12周磁感应强度，磁通量，磁场的高斯定理。毕—萨定律，运动电荷产生的磁场。

Magnetic induction intensity, magnetic flux, Gauss theorem of magnetic field, Biot-Savar law, magnetic field of moved charge.

磁感应强度，磁通量，磁场的高斯定理。毕？萨定律，运动电荷产生的磁场。

Rare earth permanent magnet is used widely in components producing strong magnetic field, such as various micro special electric machine, nuclear-magnet resonator, electric device, magnetic separation equipment, magnetic machine, and magnetic therapy appliance of computer, automobile, apparatus, instrument, household electrical appliance, petrochemical, medical care, and aerospace, etc.

中国钢铁—山东冠洲稀土钕铁硼永磁材料广泛应用于计算机、汽车、仪器、仪表、家用电器、石油化工、医疗保健、航空航天等行业中的各种微特电机，核磁振共振设备、电器件、磁分离设备、磁力机械、磁疗器械等需产生强间隙磁场的元器件。

Since the shield material has characters of high magnetic inductivity with low magnetic saturation intensity and low magnetic inductivity with high magnetic saturation intensity, different material should be used under different circumstances.

究其磁屏蔽材料本身的特性，磁屏蔽材料存在高磁导率、低磁饱和强度和低磁导率、高饱和磁感应强度等特点，因此在不同屏蔽环境下，屏蔽材料的选择亦是不同。

There are various ways to shield static magnetic field. The principles of which come to one: to form a relatively closed space by using high magnetic inductivity material, in which space the magnetic flux runs through side of the shield, and thus the magnetic intensity is reduced.

静磁场屏蔽方式可以有许多方法，其原理都是采用高磁导率材料作为屏蔽体材料，在需要屏蔽的空间内形成一个相对密闭的空间，使得磁通沿着屏蔽体侧壁流过，从而减低屏蔽空间内的磁场强度，以达到屏蔽效果。

A numerical model based on nonlinear shallow water equations and finite volume method is developed, which can calculate the overtopping discharge of oblique and multidirectional wave on sloping seawall.

本文以非线性浅水方程为基本公式，有限体积法为数值方法建立了可以计算斜向和多向不规则波在斜坡堤上越浪量的数值模型。

For instance, Lifebuoy, its disinfectant soap, is one of the world's oldest global brands.

以它的消毒皂爱肤宝为例，爱肤宝是世界上历史最悠久的品牌之一。