电动机控制中英文对照外文翻译文献

1、 电动机控制中英文对照外文翻译文献电动机控制中英文对照外文翻译文献(文档含英文原文和中文翻译)原文：Control of Electric winchFor motor control, we know the best way is to use the style buttons to movethe many simple manual console. And this console, in some applications may still bea good choice, as some complex control headache can also be used. T

2、his articledescribes in your design, build or purchase winch controller, you have the motorsbasic electrical equipment and you will need to address the user interface commandaddressed.First, the manual should be a manual control console type, so if you removeyour finger buttons, hoist will stop. In

3、addition, each control station equipped withan emergency need to brake, hoist the emergency brake to cut off all power, not justthe control circuit. Think about it, if the hoist at the stop, it did not stop, you do needa way to cut off the fault line protection power. Set the table in the control of

4、 a keyoperated switch, is also a very good idea, especially in the line leading to the 电动机控制中英文对照外文翻译文献starter toggle switch inside the elastic recovery process to deal with more problems,rather than tripping device or a hand-off the current contacts.A necessary condition for speedOf course, the sim

5、ple fixed speed starter is replaced by variable speed drives.This makes things start to get interesting again! At a minimum, you need to add aspeed control dial operation platform. Joystick is a better user interface, because itmakes you move parts of a more intuitive control.Unfortunately, you can

6、not just from your local console to send commands tocontrol the old variable speed drives, in addition, you can not want it in the initialstages, will be able to enhance the safe and reliable and decentralized facilities. Mostof the variable speed drive can not achieve these requirements, because th

7、ey arenot designed to do upgrading work. Drivers need to be set to release the brakebefore the motor can generate torque, and when parking, that is, before therevocation of torque, the brake will be the first action.For many years, DC motors and drives provide a number of common solutions,such as wh

8、en they are in a variety of speeds with good torque characteristics. Formost of the hoist of the large demand for DC motor is very expensive, and that thesame type of AC motor than the much more expensive. Although the early AC drivesare not very useful, as they have a very limited scope of applicat

9、ion of the speed, butproduced only a small low-speed torque. Now, with the DC drives the developmentof low cost and a large number of available AC motors has led to acommunication-driven revolution.Variable speed AC drives in two series. Frequency converter has been widelyknown and, indeed, easy to

10、use. These drives convert AC into DC, and then, and thenconvert it back to exchange, the exchange after the conversion is a differentfrequency. If the drive produced the exchange of 30Hz, 60Hz a normal motor will runat half speed. Theoretically, this is very good, but in practice, this will have a l

11、ot ofproblems. First of all, a typical linear motor 60Hz frequencies below 2Hz 3Hz area orthere will be errors, and start cog (that urgent push, yank), or parking. This will limityour speed range lower than 20:1, almost not adapted to the operational phase ofthe fine adjustment. Second, many low-cos

12、t converter is not able to provide therated torque at low speeds. Use of these drives, will result in the rapid move toupgrade the components or complete failure, precisely, when you try to upgrade astable scientific instruments, you do not want to see this situation. Some newinverter is a closed-lo

13、op system (to get feedback from the motor to provide a moreaccurate speed control), and the motor will work quite well.Another series of AC drives is the flow vector type drive. These componentsrequire installation of the spindle motor encoder, encoder makes use of these drives 电动机控制中英文对照外文翻译文献High-

14、end controllerFor complex transmission, the controller became complex, more than speed,time and location control. They include complex instructions to write and record themovement contour, and the processing can immediately run the ability tomulti-point instructions.Many large opera house is toward

15、the direction of point lift system, where eachone is equipped with a rope to enhance independent winches, rope equivalent tothose of each dimmer circuit. When more than one hoist is used to enhance theindividual part, the hoist must be fully synchronous, or the load to shift, so will leadto a separa

16、te winch becomes the risk of overload. Control system must be able to beselected to keep pace winch, or a hoist winch is not able to maintain synchronizationwith the other, can provide the same high-speed parking capacity. For a typicalspeed of 240 ft / min and a winch to maintain the rate of error

17、of between 1 / 8points of equipment, you only have less than three microseconds of time to identifyproblems and try to correct the error The hoist speed, make sure you fail, you startall the winch stop the group. This will require a large amount of computation, fast I /O interface, and easy to use t

18、o write software.For large rope control system has two very different solutions. The first is to usea separate console, the problem in general terms, this console should be installed inthe appropriate location of the operator perspective. However, this not only fromone angle to another angle, but st

19、ill can not get an instruction to another instructionfrom the control. These difficulties have been partially resolved. Installed in differentlocations through the use of video cameras, and these cameras connected to thethree-dimensional display graphics, these graphics enables the operator to obser

20、vefrom the perspective of any of the three coordinates in the expected direction ofrope movement. These operators can make from a console for him at the actualangle, or closed circuit camera practical perspective, to observe the movement ofthe rope on the screen. For the complex interrelated moving

21、parts, makes theimplementation of the above observation Failure to control and find out easier.Another solution to the problem is a distributed system that uses multiple lightconsole. This will allow the different operators in the same way the different aspectsof control gear, we have improved the m

22、anual control device. A vivid example is theflower in a vegetable market in central London, the Royal Opera House, the programuses the above, where the control console 240 with ten motors. Each console hasfive playback device, and has been open, so that each motor has been assigned to asingle consol

23、e. An operator and a console can control all the devices, however, oftenmay be running a console platform screen upgrade, another console is a console onthe transmission device, and the third console is used to the necessary background in the background image down. 译文： 电动机控制中英文对照外文翻译文献控制定速电动机对于一台定速卷

24、扬机的实际控制设备是一台三相起动器。电动机的转向被反向，是通过简单的开关控制相序从 A-B-C 变换到 C-B-A。这些动作被完成，是通过两个三磁极式电流接触器，而且它们是互锁的，所以，它们不可能被同时关闭。NEC 公司要求同时拥有过载和短路保护装置。为了保护电动机免受由于机械过载引起的过热的影响，在起动器内要安装热量过载延迟装置。当热量过载延迟装置过热时，它所拥有的双金属长条断开电动机的电源。除此外，还可以选择一台电热调节器可以用缠绕的方式安装在电动机上，它可以用于监控电动机的温度变化。对于短路保护，我们一般是通过电动机常用的熔断器来实现的。一台独立的线性电流接触器，被配置的电流接触器应该超

25、过主回路的电流接触器，从而达到冗余的目的。这台电流接触器是由安全电路来控制的，如：紧急制动和越程极限。我们可以使用限位开关来实现上述的操作。当你到达正常的行程极限位置末端时，卷扬机就会停车，并且你只能够向相反的方向移动卷扬机(即远离极限位置的方向)。这里也需要一个越程限制以防万一，由于电气的或者机械的问题，而使卷扬机的运行超过正常的极限位。如果你碰到越程限制器，线形电流接触器就会打开，因此，卷扬机将无法被驱动超过这个极限位置。如果上述情况发生，就需要请专业的技术人员来检查导致碰到越程限制器的具体原因。然后，你就能够用起动器内部的弹力恢复拨动开关来处理越程的问题，而不是使用跳闸器或是手工切断电流接触器。变速的必要条件当然，简单的定速起动器被变速驱动器所取代。这就使事情开始变得有趣起来了！至少，你需要在控制操作台上增加一个速度表盘。操纵杆是一个较好的操作接口，由于它使你对部件的移动有一个更直观的控制。不幸的是，你不能仅仅从你的本地控制台去发命令控制老式的变速驱动器，此外，你不能希望它在初始阶段，就能安全而可靠的提升与下放设备。大多数的变速驱动器不能实现上述的要求，因为它们并不是设计用来做提升工作的。驱动器需要设置成在制动器松开之前，就能够在电动机上产生扭矩，并且，当停车时，即在扭矩撤销之前，制动器将先动作。 电动机控制中英文对照外文翻译文献(基于 PLC 的控制