Table of Contents

Seminar On Eddy Current Brake Report PDF Download

抽象的

This is an electric braking system which works on the principle that eddy current produced in it opposes the driving torque. This opposing torque is used to brake the automobiles. Mainly this system is purely based on Faraday’s laws of electromagnetic induction and Lenz’s law.
为了操作此此操作，在转向柱上提供了一个控制开关，以便轻松手册。该系统可以将机械制动系统的打滑和复杂性最小化。同样可以减少车辆的磨损。
Since researches are going on to eliminate some of the disadvantages of this system, we can accept it to be the norm one in a few years of time.

介绍

Many of the ordinary brakes, which are being used now days stop the vehicle by means of mechanical blocking. This causes skidding and wear and tear of the vehicle. And if the speed of the vehicle is very high, the brake cannot provide that much high braking force and it will cause problems.

普通制动器的这些缺点可以通过制动系统“涡流制动器”的简单有效机制克服。这是用于制动包括火车在内的车辆的无磨损方法。它利用了涡流的相对趋势
Eddy current is the swirling current produced in a conductor, which is subjected to a change in magnetic field. Because of the tendency of eddy currents to oppose, eddy currents cause energy to be lost. More accurately, eddy currents transform more useful forms of energy such as kinetic energy into heat, which is much less useful. In many applications, the loss of useful energy is not particularly desirable. But there are some practical applications. Such an application is the eddy current brake.

PRINCIPLE OF OPERATIONS

涡流制动器根据法拉第的电磁诱导定律起作用。根据该定律，每当导体切割磁力线时，都会在导体中诱导EMF，其大小与磁场的强度和导体的速度成正比。如果导体是光盘，则将有循环电流，即圆盘中的涡流。根据伦茨的说法
law, the direction of the current is in such a way as to oppose the cause, i.e. movement of the disc.
本质上涡流制动器由两个parts, a stationary magnetic field system and a solid rotating part, which include a metal disc. During braking, the metal disc is exposed to a magnetic field from an electromagnet, generating eddy currents in the disc. The magnetic interaction between the applied field and the eddy currents slow down the rotating disc. Thus the wheels of the vehicle also slow downsince the wheels are directly coupled to the disc of the eddy current brake, thus producing smooth stopping motion.

WORKING

当车辆移动时，将涡流制动的转子盘耦合到车轮的车轮，靠近固定磁极。当我们想制动车辆时，将放置一个控制开关，将其放在转向柱上，以便于操作。当操作控制开关时，电流从电池流向磁场绕组，从而使磁铁充满电。然后旋转圆盘将切割磁场。当光盘切割磁场时，磁盘中的通量变化发生在与磁场强度成正比的磁盘中。电流将流回金属板的零场区域，从而形成闭合电流环，例如旋转或涡流。电流的流动总是意味着也有一个磁场。由于Lenz的定律，涡流产生的磁场与运动方向相反。因此，不是机械摩擦，而是产生磁摩擦。因此，光盘将经历“阻力”或制动效果，因此碟片停止旋转。 The wheels of the vehicle, which is directly coupled to the disc, also stop rotation.

车轮旋转的速度更快，效果更强，这意味着随着车辆的减速，制动力会减少产生平稳的停止动作。可以将控制开关设置在不同的位置，以控制激发电流到几个集值，以调节磁通量，从而调节制动力的大小。即，如果车辆的速度是LPW，则需要低制动力才能停止车辆。因此，控制开关设置为最低位置，以便将低电流提供给场绕组。然后，产生的磁场将具有低强度，因此产生所需的低制动力。

ADVANTAGES

Less maintenance
Wide range of braking force available within the temperature limit
Prolonged braking is possible
Long life
较少的操作压力
Smooth retardation, which cuts down, the tire wears

Eddy current brakes offer smooth retardation of vehicles without skidding. It is totally free of wear and tear. So it has long life compared to ordinary brakes. These need less maintenance.
In mountain areas continuous braking is needed for a long time. At this condition, eddy current braking is more suitable to function without overheating. By changing the excitation current to the field winding, i.e. by adjusting the position of the control switch, we can vary the braking force to required range. The operation of eddy current brake is very simple. i.e. the control switch is a soft switch which can be operated without any strain.

缺点

休息时没有破碎的力量
Need of electric power

The main disadvantage of the eddy current brake is that it needs electric power to work. Researches are going on to overcome this disadvantage by making the brake regenerative i.e. by converting the kinetic energy of the vehicle into electric energy and storing it back into the battery.