查询词典 motor-show

The intelligent power module, the detect circuit of current and motor speed, DSP and the program implement of the function module of the squirrel-cage induction motor vector control system are all presented particularly in this paper.

文中对智能功率模块 IPM、DSP 芯片、电流和转速检测电路以及异步电机矢量控制系统各个功能模块的 DSP 编程实现都进行了详细的介绍，重点介绍了模糊算法和空间矢量算法的 DSP 编程实现方法。

Three-phase squirrel-cage induction motor in its structure is simple, cost-effective and of good work, and many other advantages, in today's industrial applications in various fields have a wide range of applications, but it is an obvious shortcomings, is the starting current too big ( General starter for the rated current of the current five to seven times or even greater), so regardless of the motor itself, or the power grid and other electrical equipment, will have a negative impact.

留学解答资讯网：三相鼠笼式异步电动机以其结构简单、性价比高和工作特性好等诸多优点，在当今工业应用的各个领域都有广泛的应用，但它有一明显缺点，就是起动电流过大(一般起动电流为额定电流的5～7倍甚至更大)，这样不论是对电动机本身，还是对电网以及其他电气设备，都会产生不利的影响。

Aimed at the problem of choosing the initial value when the Newton method is used to compute the controlling unstable equilibrium point, a practical and rigorous solving scheme was presented: by identifying the controlling load bus of the given fault, and using the Thevenin equivalent circuit to represent the rest of the system at the state of the post disturbance stable equilibrium point, using the steady equivalent circuit to represent the induction motor in composite load, and then using the torque characteristics of induction motor, a point near the CUEP is gained to be the initial value. The second order normal forms was used to approximate the stable manifold of CUEP, and the local approximating boundary of the region of attraction of the post disturbance stable equilibrium point was gained. Then just by simulating the state of the system at the fault clearing time, the transient voltage stability of the system could be determined.

针对采用牛顿法求取故障后系统主导不稳定平衡点(controlling unstable equilibrium point，CUEP)存在的初值选取难题，提出一种实用但不失严谨的解决方案：通过识别给定故障的主导负荷母线，对主导负荷母线以外系统由故障后稳定平衡点处的状态进行戴维南等值，对负荷中感应电动机部分采用其稳态等值电路，再由感应电动机的转矩特性求得CUEP附近的一个点作为近似的CUEP，以此为迭代初值可靠求得CUEP；采用二阶正规型来近似CUEP的稳定流形的方法求得近似的局部吸引域边界；由仿真得到故障清除时刻系统的状态并根据该状态是否位于吸引域内判断系统的暂态电压稳定性。

E. Voltage starting: check the situation of motor, to control the motor steady starting.

e。电压起动：通过实时检测电机的状态，自动去控制电机平稳起动。

By comparing traditional starting method of a motor,that is direct starting full voltage and reduction voltage to soft starting and analysing for them,this paper points to outstanding performance of soft starting technology in modern motor control.It is a new kind of technology to replace previous traditional starting method and has wide application in production and daily life.

通过对电动机的传统启动方式：全压直接启动、降压启动的简介及软启动技术的分析和对比，提出了软启动技术在现代电机控制中具有的卓越性能，它是替代以往传统启动方式的一项新技术，在工业生产和生活中有着极为广阔的应用前途。

In this paper, according to the theory of electromagnetic fields, firstly, electromagnetic field of large and medium asynchronous motor is calculated from the angle of coupled fields, secondly, the end voltage of the stator is taken as constraint condition and starting current in stator is iterated in the numeral computation process, finally starting current and starting torque at rated voltage are gained, and by comparing calculation results with test results ,starting performance of large and medium asynchronous motor meet the demand of project practice.

本文根据电磁场理论，从耦合场的弱耦合角度首先计算了大中型异步电动机的电磁场，在电磁场的数值计算过程中，以定子端电压为约束条件，对定子起动电流进行了迭代计算，得到了额定电压下的起动电流和起动转矩，并把正弦时变场计算结果与实测结果进行对比，表明大中型异步电动机的起动性能的计算结果满足工程实际的需要。

The main content of this thesis is as follows: 1The structures of EPS are analyzed. The main components of EPS are introduced in detail. Then the distributed torque in EPS is analyzed and the control system model is set up. 2Three control modes are discussed and the control strategy of EPS is studied in detail. Three principal modules in the control strategy are discussed—the predicted module which predicts motor rotational speed and steering rotational speed, the power-assistant module and the return control module. 3The assistant torque curves of the motor are designed by using the B-spline, so that any kind of custom-built assistant torque curves can be designed according to different kinds of automobiles. 4The hardware frame of EPS is studied. The developed controller based on 8-bit MCU MC68HC908MR8 is introduced and many related circuit units are designed, including the control circuit, the driver control circuit and so on. The software structure is discussed, then the steering control program flowchart is given.

本文的主要工作有： 1分析了EPS 的总体构成，对EPS 的各个部件作了详细的介绍，并在此基础上分析了EPS 的受力情况，建立了控制系统模型，并研究了EPS 的安全性能； 2讨论了EPS 的三种控制方式，提出了控制策略，并讨论了其中三个关键模块的作用：预估模块包括对电机转速和方向盘角速度的预估，助力控制模块以及回正模块； 3用B 样条插值方法进行EPS 助力曲线的设计，可按照用户的要求设计任意形状的助力曲线，以满足不同车型和不同用户的要求； 4研究了控制系统的硬件结构，以MC68HC908MR8 为核心设计了控制器，详细讨论了控制器的控制电路、驱动电路等；设计了控制系统的软件，给出了控制程序流程图，并对要点进行了详细的说明。

Another, In view of the embroidered frame of step motor for motion control, Improved rapid precision linear interpolation algorithm-grid method is proposed, with realizing step motor variable distance interpolation.

主轴电机与绣框电机的协调运动是实现平稳刺绣的关键。

Stepper motor control, can be a good learning SCM stepper motor control and application of the principle.

步进电机控制，能很好地学习单片机控制步进电机的原理及应用。

Are used in part design calculation of submersible motor that improves the design method of this kind of motor.

本课题还开发了Windows系统下的潜油电机计算机辅助设计软件。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。