电机驱动的

Based on the requirements of ascertaining the orientation and dimension of toy major axis, calculating the flaming dimension and speed along with the toy major axis in American standard consumer safety specification for toy safety, combine with PLC control technology, high-performance and fine-segmentation driver as well as step-in motor.

基于美国玩具安全中要求确定玩具的主轴线方向和尺寸，并沿主轴线方向计算玩具燃烧长度和速度的需求，结合PLC控制技术、高性能细分型驱动装置和步进电机的工作原理，对研制玩具燃烧测试仪的工作原理、工作过程、结构设计以及软硬件结构和技术特性进行了详细论述，指出此测试仪可满足美国玩具燃烧测试需求。

The reactive flywhell is a good choice to satisfy high accuracy and high stability request of the satellite attitude control system. Because rare earth permanent magnet motor has simple structure, small bulk, light weight, credible performance, little ullage and high efficiency, it has been applied in the reactive flywheel more and more.

反作用飞轮是当前实现卫星姿态的高精度、高稳定控制的一种最佳选择，而稀土永磁电机由于具有结构简单、运行可靠、体积小、重量轻、损耗少、效率高等诸多优点，已经越来越多地应用于反作用飞轮的驱动中。

By practical application,the bidirectional circumrotation/speed adjustment of motor are realized safely and reliably.The products has a small physical volume,fast heat transmission,high efficiency and can operate properly in severe environment.It can enhance the reliability of the drive circuit and the system,and adapt to both military and commercial usage.

经实际应用，该电路不仅安全可靠地实现了电机的双向转动和调速功能，且产品体积小，导热性能好，效率高；还能在恶劣的使用环境下安全工作，提高了驱动电路和系统的可靠性，适合军、民两用。

This topic is advanced for the problem of the step motor of the Metallographic Sample Cutting Machine .

自动金相试样切割机是用于产品质量检验和材料科学研究的专用设备，步进电机是驱动往复运动机构的关键部件，它的运行状况很大程度上影响切割金相试样的质量。

The feed motion is projected into each feed axis, and based on its mechanical model(motor driving torque/force, Inertial force and cutting force), the constraint relationship between feedrate, feed acceleration, and feed drive capabilities and toolpath geometric characteristics is derived. With this constraint model, the acceleration and deceleration of each axis can be limited within its capability.

将进给运动分解到各运动轴，根据机床进给轴的力学(电机驱动力／力矩、进给系统所受的惯性力及切削力)模型，推导了多轴联动加工时进给速度、加速度与各进给轴驱动能力以及加工路径几何特性之间的约束关系，使得加工过程中机床各运动轴的加减速始终处于其加工能力范围内。

FLOAT PNEUMATIC CLAMP: The work piece is held in place by float pneumatic clamp with large holding forcestable feeding characteristics to the X-slide. The integrated swallowtail type carriage is high in rigidity. The clamp is easy to movethe slides run on hardened precision linear guide waysare driven by AC-servo motors.

浮动式气动夹钳：强大的夹持力保证加工板材在X滑架上稳定地进给，全燕尾型滑架完善的刚性使夹钳很容易地在伺服电机的驱动下沿硬化的高精度线性导轨上平稳精确运行。

The average current in every phase is obtained by means of Pulse Width Modulation, frorn which becomes the composed vector, and the driving on fractional step angle of stepmotor can be realized.

从而构成合成矢量，实现分数步进角的驱动。实验结果表明，其转角精度高于任何数字编码器的分辨率，极大地提高了步进电机的伺服精度。

The correct use of the wind box elastic sealing device for sinters, and its effect on the working current of the driving motor are described in detail, and the anti air leakage measures for the pallet body are introduced as well.

重点分析了烧结机主要漏风部位——风箱弹性密封装置的正确使用及其对驱动电机工作电流的影响，同时也介绍了台车本体的防漏风措施。

The correct use of the wind box elastic sealing device for sinters, and its effect on the working current of the driving motor are described in detail, and the anti air leakage measures for the pal

重点分析了烧结机主要漏风部位——风箱弹性密封装置的正确使用及其对驱动电机工作电流的影响，同时也介绍了台车本体的防漏风措施。

For reducing the room, I design the base chest into the form of the control tank. The pedestal oil box located the under layer, the super stratum is the integration control area of the hydraulic pressure and electrical control. Join the drive electromotor with the hydraulic pressure pump by the link flange .All the hydraulic pressure control clique install on the assemble piece. It will reduce the collectivity area.

为了减少布局空间，将台钻下装部分设计成箱体控制柜的形式，底座油箱置于下层，上层为液压及电气集成控制区，将驱动电机用联接法兰联成一体，将所有的液压控制阀集成安装在一个大的阀块体上，大大减小了台钻的整体布局。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。