电机的

The three-wire configuration simplifies connection, and makes reversing the motor's direction simply a matter of switching the position of two leads.

三线配置简化了连接过程，只需要准换一下两根导线的位置就可以改变电机的运转方向。

The main content involve the design of the whole project and the frome structare,the design of driving part,the design of the center of grawing,the design of the parts of the machine tool which contain the design of the thread bar,the caculation of the electromotor.

设计共分四章，主要内容有：总体方案与机架的设计；传动方案设计；机床零部件设计，其中包括丝杠和电机的计算；重心计算。

Based on the above analysis, we believe that the simplest solution is to bus voltage 6kV within the allowable range (± 10%) increased number, in order to improve the motor starting torque, reduce the startup time.

根据上述分析，我们认为最简单的办法就是将母线电压6kV在允许范围内(±10%)提高一些，以提高电机的启动力矩，缩短启动时间。

Because of the existence of speed reducer, the antenna pointing mechanism could not get precise position signal of the rotor.

摘 要：使用大减速比减速器的卫星天线指向机构难以从传动链末端反推获得电机的精确位置信息。

The speed controller works by varying the average voltage sent to the motor.

工程的速度发送到控制器通过改变电机的平均电压。

The definition of phase number for multi-phase machines and the winding structure for six-phase induction machines are described in this paper.

引言自上个世纪初以来，电力发电、输配电系统都是三相系统。但目前三相电机的地位已经受到一定的挑战。

At the same time, the finite element model of six-phase ten-pole fault-tolerant permanent magnet machine is established to simulate and compute static and transient electromagnetic fields using vector magnetic potential method.

同时建立了六相十极永磁容错电机的有限元仿真模型，利用有限元矢量磁位法对该模型进行了静态和瞬态电磁场的仿真分析。

When the system starts, the speed outer ring saturats non-functional, the current inner ring plays a major role to regulate the starting current to maintain the maximum so that the speed linear change, to reach a given value; when it operates steadily, the speed negative feedback from the outer ring plays a major role ,to let the speed changes with the given speed voltage , at the same time the current inner ring regulates the armature current of motor adjustment to balance the load current.

该系统起动时，转速外环饱和不起作用，电流内环起主要作用，调节起动电流保持最大值，使转速线性变化，迅速达到给定值；稳态运行时，转速负反馈外环起主要作用，使转速随转速给定电压的变化而变化，电流内环跟随转速外环调节电机的电枢电流以平衡负载电流。

In the design considers the electrical machinery emphatically the choice, the gear box and the hydraulic system design.

设计中着重考虑电机的选择、变速箱和液压系统的设计。

This paper introduced the development,principle,structure and features of linear synchronous motor,and the control methods of the LSM.

本文介绍了直线同步电机的发展、原理、结构和特点，以及它的控制方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。