Electromagnetic braking system group 14

ELECTROMAGNETICBRAKING SYSTEM

SUBMITTED BYAvinash Patel(K10504)Sunil Kumar (K11255)Ravi Prakash (K10567 )Vikash kumar (K11092)

B.TECH(M.E)-Final Year

GUIDED BYMr. Bhupendra Gahlot(Assistant prof. M.E Dept.)Career point universityKota (Rajasthan)

BRAKE

• A brake is a mechanical device which retards motion.

• Brakes use friction between two surfaces to convert the kinetic energy of the moving object into heat.

Disc Brakes

Need for Alternative

• All conventional systems of braking in road vehicles uses development of contact friction for retardation

• These systems are prone to the wear and tear on usage

• Conventional braking systems produces continuous power dissipation as heat and may fail if the temperature rises too high

• Friction based braking methods are also not efficient under wet conditions

INTRODUCTION

A brake is a mechanical device which retards motion.

Electromagnetic brakes operate electrically, but transmit torque mechanically.

This is why they used to be referred to as electro-mechanical brakes.

Electromagnetic brakes are used as supplementary retardation equipment in addition to the regular Friction brakes.

Working Principle

The working principle of the electro magnetic brake is based on the creation of magnetic field with in a metal disc rotating between two electro magnets, which sets up a force opposing the rotation of the disc.

Electromagnetic Braking

• Disc is rotated in magnetic field• eddy currents will be produced in disc• eddy currents induced in disc will produce a

torque (motor principle)• produced torque in disc opposes actual

rotation of disc (Lenz law)

Stator And Rotor

Typical Electromagnetic Brake

ADVANTAGES

Electromagnetic brakes can develop a negative power which represents

nearly twice the maximum power output of a typical engine.

Electromagnetic brakes work in a relatively cool condition and satisfy

all the energy requirements of braking at high speeds, completely

without the use of friction.

ADVANTAGES

• No friction• Low maintenance requirement• Less noise• Simple in design• High degree of safety

DISADVANTAGES

• Failure to act as a holding device• Usage of electric power for braking• Less effective under very low velocities

APPLICATIONS

Already in use under some railway system Can be used for any road vehicles Equally applicable to heavy and light vehicles Can be used as additional retarder for aircrafts Used in crane control system.

Used in winch controlling.

Used in lift controlling.

Used in automatic purpose.

CONCLUSION

• Electromagnetic Braking is superior to conventional frictional braking as there is no friction and heat in electromagnetic braking.

• So the conventional disc and drum brakes can be replaced with electromagnetic brakes.

THANK YOU