New Hybrid‐Excited Motor Using Armature Windings as Field Flux Source

In this paper, a new hybrid‐excited motor is proposed. Its unique feature is that it has no field exciting coil, despite being a type of bypass yoke core (BYC) hybrid‐excited synchronous motor. Based on finite element analysis (FEA), the following facts are clarified. Since the stator coil magnetomotive force (MMF) and claw poles rotate at the same speed and in the same direction, they are motionless relative to each other. Since the claw poles are located at one of its ends near the BYC surface with a gap, it receives immovable magnetization by the stator coil MMF through the BYC; then the claw poles can supply a magnetic field flux via the BYC. This flux via the BYC increases the total torque, because its torque is added the two other torque components: the permanent magnet torque and claw poles reluctance torque. In addition, the magnetic polarity and the amount of the flux of the claw poles can be varied by controlling the armature current phase angle.     

基于Pro/E的偏转线圈曲面反求

运用反求工程方法对偏转线圈进行了平滑处理，使用三坐标测量机（CMM）对偏转线圈的上下表面进行了选点测量，根据所得到的数据云点利用Pro／E软件的曲面相关功能对偏转线圈曲面进行了重构，并对线圈成型模具曲面进行了数控加工轨迹模拟。本研究对偏转线圈绕线模的设计与制造具有重要的作用。     

十字滑块压缩机的止转轭机构研究

十字滑块压缩机因其紧凑的结构。优良的力平衡性能，在微小型无油高压场合得到日益广泛的应用。止转轭机构是十字滑块压缩机中最关键的部件。本文在总结归纳目前常用的几种止转轭机构的基础上，提出了一种新的止转轭结构。     

Target utilization of planar magnetron sputtering using a rotating tilted unbalanced yoke magnet

The dependence of the magnetic flux density, erosion uniformity, and target utilization on the yoke magnet tilt angle was investigated in a planar magnetron sputtering system, using a rotating, tilted, unbalanced, asymmetrical magnet. In these experiments, circular and elliptical outer yokes were used as the rotating yoke magnet. The magnetic flux density distributions were measured two-dimensionally on the target surface and compared with the erosion uniformity. As the yoke magnet tilt angle increased, the magnetic flux density distribution expanded and became more uniform, and the eroded areas expanded toward the outside of the target surface. With a circular outer yoke, as the yoke magnet tilt angle increased from 0° to 8°, utilization of a 5-inch target linearly increased from 60 to 80%. On the other hand, with an elliptical outer yoke, the utilization of the target was approximately 70%, regardless of the yoke magnet tilt angle. This is because, as the tilt angle is increased, the inner area of the target eroded more deeply, while the outer area eroded less deeply. The deposition rate when using the elliptical outer yoke was 1.2 times faster than that of when using the circular outer yoke at the same magnet tilt angle. By decreasing the magnetic flux density on the inner area of the target with an elliptical outer yoke magnet, a higher deposition rate may be obtained than is observed with a circular magnet, and target utilization of over 70% can be achieved.     

A deflection yoke for projection TV with reduced geometrical distortion

Abstract— We have succeeded in coping with raster‐distortion and deflection‐defocusing problems in CRT projection TV by utilizing a longer horizontal coil and uniquely shaped windings. The field distribution along the tube axis was also modified and optimized to achieve minimum raster distortion and deflection defocusing simultaneously. The position of the centering magnet was shifted towards the screen side to minimize the defocusing of the spot.     

论旋转磁场式Π形电磁轭的提升力

导出相位角α与夹角为θ的两相交磁场合成的旋转磁场的一般关系式 ,得出提供两相交磁场的Π形电磁轭也能在工件中产生旋转磁场的结论。它的瞬间磁场B(t)是磁感应强度峰值Bm,α和θ的函数 ;而该电磁轭的提升力 F则是Bm 和磁轭铁心截面S的函数。因此 ,该电磁轭提升力的大小不能确切反映它所能提供的Bm 和合成磁场的磁感应强度B的大小     

凸轮机构的消化吸收方法

本文提出了一般凸轮廓线的拟合方法及修正方法,探讨了从理论上对共轭凸轮、等径凸轮的共轭精度进行检验的方法.     

论摆动磁场式Π形电磁轭磁场和提升力

推导了一恒定磁场与一正弦交变磁场合成为摆动磁场的数学关系式,设计出摆动磁场式Π形电磁轭,一次磁化即可实现全方位探伤。该磁化装置的提升力与其在工件中产生的合成磁场无对应关系,因此不能反映对工件的磁化能力。     

等径凸轮式高速多臂机的分析与设计

等径凸轮式高速多臂机由于其适应于高速和结构简单而有着广泛的运用.本文给出了等径凸轮机构的设计计算方法,并对影响设计的一些因素如综框运动规律和凸轮压力角进行了讨论.     

一种衬衫过肩工艺模板的设计

在模板缝制工艺技术中,最核心的问题就是模板的设计.在分析衬衫过肩缝制工艺的基础上,研究了过肩工艺模板化的方法,通过与传统工艺的对比阐述了模板技术的优势.