涡流损耗

Expressions are developed for the eddy current loss as a function of speed.

文章推导了频域涡流场和涡流电流密度公式，计算了磁阻力矩损耗功率和涡流损耗功率。

For the problem of rotor eddy current loss,a harmonic impedance device was used to reduce eddy current loss,which is an effective way to reduce the temperature.

针对转子涡流损耗的问题，采用了一种加感抗器减小谐波涡流损耗从而降低温度的有效方法。

Calculations and experiments are carried out on both magnetic flux density and eddy current loss of the non-magnetic steel plate and of the coil in this model.

对该模型低磁钢板及线圈的磁通密度和涡流损耗进行了试验与计算分析，得到了一些有价值的试验和分析结果，为磁场计算和三维涡流损耗分析方法提供了验证手段。

The magnetic drag moment and eddy current loss are investigated.

永磁磁浮轴承的损耗主要包括磁阻力矩损耗和涡流损耗。

Different stator structures have an impact on the rotor eddy current loss and the rotor loss can be reduced by proper motor design.

定子结构对高速电机转子涡流损耗影响很大，合理地设计定子结构能够减小转子涡流损耗。

The change and the distribution of magnetic field in magnetic core are described with system state equations of magnetic switch and Jiles-Atherton model so that whole operation of magnetic switch and its application circuit can be obtained, meanwhile total loss, eddy current loss and magnetic hysteresis loss of magnetic switch can be calculated.

利用磁开关的系统状态方程和Jiles-Atherton磁滞回线模型描述磁芯中磁场的变化和分布，从而得到磁开关及其应用电路的整体工作特性，同时计算出磁开关的总损耗、涡流损耗和磁滞损耗。

Therefore except for the hysteretic losses, it is necessary to consider the eddy current loss and coupling loss in application of HTS tapes at temperature regions near 4. 2K and 30K.

因此，在4.2K和30K温区高温超导带材的应用中除了磁滞损耗外，必须考虑涡流损耗和耦合损耗的影响。

Based on the Jiles-Atherton model, the dynamic hysteresis loss model of the transformer core considering the classic eddy current loss and abnormal loss is developed, which is suitable for all the reasonable coefficient of reversible magnetization and adopting the flux density as entry variable.

该文在Jiles-Atherton基本磁滞模型的基础上，从能量平衡原理出发，考虑铁心在交流状态下的涡流损耗和异常损耗，建立了合理可逆磁化系数条件下，以磁通密度作为输入量的铁心动态磁滞损耗模型。

However,the analysis and design of parallel windings are more complicated.Parallel windings including litz wire,litz PCB,twisted and common parallel PCB are evaluated,then respective eddy current loss analytical models were built and systematical algorithm were also proposed for the loss models programming.

与采用单根导体的线圈比较，并联线圈不论损耗模型还是设计技术都有很大的不同，其线圈涡流损耗频率特性影响因素多[1-3]，很复杂，特别是对应用于平面变压器的并联PCB线圈，很难根据对高频涡流效应的直观理解和已有的高频功率变压器线圈损耗模型对其进行设计分析。

Based on the developed iron loss of surface-mounted permanent magnet machine of Slemon and Xian Liu, the expressions of the peak and the time rate change of flux density in the teeth and the yoke are derived, considering the beveling edges of the PM. According to the basic concept of the eddy current loss, the analytic calculations of the average eddy current loss density in the teeth and the yoke are presented respectively. Hence, a calculation method for the iron losses of PM with beveling edges is presented.

在Slemon和Xian Liu表面置磁型永磁电机改进铁耗算法的基础上，分别推导了考虑磁体边缘斜角时定子齿与轭的磁通密度的幅值及其时间变化率的表达式，结合涡流损耗的基本概念，分别提出了永磁电机定子齿与轭的平均涡流损耗密度的解析计算方法，由此建立了永磁电机铁耗的解析模型。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。