电动机

Theparallel connection device for the altern ating currentmotor can solve this problem effectively.It is proved thatthe motor can be smoothly switched to the power grid with the application of parallel connection device.

交流电动机并网控制器很好地解决了这一问题，实践证明电动机的电源切换是能无扰动平滑切入电网的。

Based on this, considering the domestic geological condition and the use of the existing equipment, the self-adaptive energy-saving motor consisted of two three-phase asynchronous motors which run coaxially is designed.

以此为基础，同时考虑到我国油田的地质情况和对现有设备的利用，设计了以两台三相异步电动机组成的同轴运行的自适应节能电动机。

The optimization of motor construction and adequate control strategies are main measures to reduce cogging force in a PMLM.

目前电动机几何结构优化与有效的控制策略是减小直线电动机cogging力的主要措施。

There are many advantages for the permanent magnet synchronous motor than AC induction motor such as higher power density, lower heating on the rotor and compacter structure.

永磁同步电动机较异步电动机具有功率密度大、转子发热量小、结构紧凑等优点。

It introduces a kind of novel loading test system, based on the operation principle of damper. this loading system is operated by the driving motor. it realizes the loading, in that the damper has a negative drive force that puts on the motor. Based on the ordinary electromagnetic damper, the thesis presents a novel hybrid excitation electromagnetic damper which has adjustable work characteristic, analyses the working principle and structural feature of the electromagnetic damper, deduces the formulas to calculate the eddy current density through the Electromagnetic theory, analyses the distribution of the eddy current in the cotyloid rotor, and also studies the method of calculating the damp torque, establishes the mathematical model of the electromagnetic damper, analyses the relationship between the electromagnetic damper structural parameter and damp torque, researches the engineering design and analysis method of the electromagnetic damper, provides theory foundation for the design and analysis of the electromagnetic damper, contrives a hybrid excitation electromagnetic damper that satisfies the target request, designs a set of compound excitation electromagnetic damping loading control system whose control core is AT89C51 monolithic integrated circuit, analyses the electric circuit part, and carries on the experimental test to this set of electric circuits. Finally it debugs this electromagnetic damping loading system, this system satisfies the target request proposed.

论文提出了一个全新的加载测试系统种类，该加载系统是在阻尼器工作原理基础上，利用电动机拖动阻尼器运转，从而阻尼器产生一个与运动方向相反的阻尼力矩，该力矩作用在电动机上实现对电动机加载测试；同时，论文在一般电磁阻尼器基础上提出了一种新型的可调式复合励磁电磁阻尼器结构，该种阻尼器的工作特性在一定范围内可进行调节；论文分析了电磁阻尼器的工作原理和结构特点，运用电磁场理论分析推导了电磁阻尼器的涡电流密度公式，分析了涡电流在转子杯内的分布图，并对阻尼力矩计算方法进行了研究，建立了电磁阻尼器的数学模型，分析了电磁阻尼器结构参数和阻尼力矩之间的关系，对电磁阻尼器的设计和分析方法进行了研究，为电磁阻尼器的工程设计建立了理论基础；设计了满足技术指标要求的复合励磁电磁阻尼器和一套以AT89C51单片机为控制核心的复合励磁电磁阻尼加载控制系统，对该控制系统硬件电路各部分进行了分析和设计，对软件进行了设计，并对控制电路进行了试验调试，该系统满足所提出的加载指标要求。

According to capability of the circuit of DC motor, build the model of DC motor; designed the speed-current double closed loop system based on the model of DC motor; analyzed the method to solve the problem of discontinuousness of current.

二、根据直流电机回路，建立电动机的数学模型；针对该电动机模型，选用速度——电流双闭环控制系统，建立双闭环系统的控制方框图；分析晶闸管相控整流方式中出现电流断续现象的解决方法。

This article expatiated the basic frame and ecumenic principle and introduced a micro-computer control system of the hybrid linear step motor, it based the characteristics and need of the control of the linear step motor, we chose the special motor control chip DSP TMS320F2407 to realize a open loop control and SPWM control .

本文阐述了混合式直线步进电动机基本结构和一般原理，介绍了一种混合式直线步进电动机微机控制系统，该系统根据混合式直线步进电机的特点和控制要求，采用电机专用控制DSP芯片TMS320LF2407进行开环和SPWM控制。

This product is applicable to coal mine where has explosible dangerous gas and coal dust,It is used for controlling direct starting stop and reversion of three-phase squierrel cage type asynchronous motor whose rated current up to 400A in system of AC50Hz rated voltage 1140V or 660V, Meanwhile it protects the electromotor and relative circuit, The starter can be combined with firedamp sensor and used to test the consistency of mining working area,the starter will trip when it exceed the limit ;adopt intrinsic safety type circuit for the control circuit; possess the function of local control and remote control by single set and multi sets procedure control; display working voltage current and gas consistency can remember fault parameter

该产品适用于具有爆炸性危险气体和煤尘的矿井中，在交流50Hz，额定电压为1140V或660V ，控制额定电流只400A的三相鼠笼式异步电动机的直接起动，停止及反转，同时对电动机及有关电路进行保护，起动器可与甲烷传感器相连接用于检测才掘工作面的甲烷浓度，当其超限时起动器跳闸；控制电路采用本安型电路；具备单台就地控制与远方控制及多台程序控制功能，能显示工作电压、电流、瓦斯浓度，并能记忆故障参数。

This paper introduces the design characteristics of low-speed permanent magnet synchronous motor for gearless pull-in system of elevator and design measures for suppression of the torque ripples at low speed ,presents the programming methods for the computer-aided design of PMSM using MATLAB,gives the test results of prototype motor,and verifies that the design idea and method are correct.

介绍了用于电梯无齿轮曳引驱动系统的低速永磁同步电动机的设计特点和抑制低速脉动转矩的设计措施，提出了建立在MATLAB平台上的永磁同步电动机计算机辅助设计程序的编程方法，给出了样机试制和试验的结果，证明了设计思想与方法的正确性。

First, the application and development of synchronous motor in incremental motion control are discoursed. The classification of electrical machines are discussed under space magnetomotive force. So a new research direction on stepping control of synchronous motor is introduced, and the study of this dissertation is significant.

首先，论述了在增量运动控制中同步电动机的应用与发展，在空间磁势下将电机进行了归类研究，从而引出了同步电动机步进控制这一新的研究方向以及本论文研究的必然性。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。