ELECTROMAGNETIC BRAKE

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Presentation Transcript

WELCOME:

WELCOME

ELECTROMAGNETIC BRAKE:

ELECTROMAGNETIC BRAKE Febin.p.t NO: 1 REG.NO :88041392 G P TC CHELAKKARA student; Submitted by;

INTRODUCTION:

INTRODUCTION ELECTROMAGNETIC BRAKES OPERATE ELECTRICALLY, BUT TRANSMIT TORQUE MECHANICALLY. THIS IS WHY THEY USED TO BE ELECTRO-MECHANICAL BRAKES……..

CONTENTS:

CONTENTS CONSTRUCTION BASIC OPERATION VOLTAGE/CURRENT-AND THE MAGNETIC FIELD ENGAGEMENT TIME BURNISHING TORQUE OVER EXCITATION WEAR BACKLASH ENVIRONMENT/CONTAMINATION

CONSTRUCTION:

CONSTRUCTION The frictional contact, which is being controlled by the strength of the magnetic field Friction material is used between the poles, If the brake was required to have an extended time to stop or slip time, a low coefficient material can be used In a brake, the electromagnetic lines of flux have to attract and pull the armature in contact with it to complete brake engagement The coil shell is made with carbon steel Friction material is used between the poles

:

A-1 Horseshoe magnet red silver iron

BASIC OPERATION:

BASIC OPERATION There are three parts to an electromagnetic brake Disengagement is very simple

Slide 8:

Electromagentic brake

Engagement Time:

Engagement Time There are actually two engagement times first one is the time it takes for a coil to develop a magnetic field The second factor in figuring out response time of a brake

Burnishing :

Burnishing What Is It and Why Is It Important? Wearing or mating of opposing surfaces process of cycling the brake to wear down those initial peaks

Torque:

Torque Burnishing can affect initial torque of a brake but there are also factors that affect the torque performance of a brake in an application torque curves showing the relationship between dynamic and static torque

Over Excitation:

Over Excitation Over-excitation is used to achieve a faster response time With over-excitation, the in-rush voltage is momentary

Wear:

Wear The main wear in electromagnetic brakes occurs on the faces of the mating surfaces. It is very rare that a coil would just stop working in an electromagnetic brake

Backlash :

Backlash Some applications require very tight precision between all components Most applications, however, do not need true zero backlash and can use a spline type connection.

Environment / Contamination:

Environment / Contamination As brakes wear they create wear particles. Obviously oil or grease should be kept away from the contact surface

:

ADVANTAGE DISADVANTAGE low cost Develop rut Easy maintains It contaminate floor Easy construction It cannot use grease/ oil APPLICATION . It mainly uses industrial application

Slide 18:

conclusion From this topic we can analyse that, the invention of EM breaking system leads the effective breaking system of vehicle The EM break system does not use directly in the vehicle but it can be use freely in industrial application

NOW YOUR TIME…:

NOW YOUR TIME…

QUEIRIES?:

QUEIRIES?

THANK YOU… :

THANK YOU …