International Journal of Engineering Science and Computing, April 2019 21413 http://ijesc.org/ ISSN XXXX XXXX © 2019 IJESC Design and Fabrication of Frictionless Magnetic Braking System Rahul Mhatre 1 , Kaustubh Nikam 2 , Sanit Pawar 3 , Sayali Wavale 4 , Prof. Varsha Magar 5 Department of Mechanical Engineering Shivajirao S. Jondhale College of Engineering, Maharashtra, India Abstract: There are various types of conventional braking system such as Drum brake, Disc brake, Hydraulic brake etc. These braking systems produce higher amount of friction which produce heat wear and tear of braking parts. The frictionless magnetic braking system is proposed using eddy current phenomenon. This phenomenon is governed by faraday law of electromagnetic induction and lenz law. Eddy current is created by relative motion between the magnet and metal conductor. The current induce magnetic field in conductor which oppose the actual magnetic field of magnet and result in deceleration of motion. I. INTRODUCTION 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. For operating this a control switch is provided on the steering column in a position for easy manual. The skidding and complexity of mechanical braking system can be minimized by this system. Also, the wear and tear of the vehicles can be reduced. 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. 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. These drawbacks of ordinary brakes can be overcome by a simple and effective mechanism of braking system ‘The eddy current brake’. It is an abrasion-free method for braking of vehicles including trains. It makes use of the opposing tendency of eddy current. 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. II. CAD MODEL Figure.1.CAD Model III. CONSTRUCTION Essentially an eddy current brake system consist of two members, a stationary magnetic field system and solid rotary member, generally mild steel, which is sometimes referred to as secondary because the eddy current is induced in it. Two members are separated by short air gap. There is no contact between the two for purpose of torque transmission. Consequently there is no wear as in brake. Eddy currents are the currents that are generated because of a change in time and space of magnetic flux passing through conducting non-ferrous metals. IV. WORKING According to Faraday’s law of electromagnetic induction whenever a conductor cuts magnetic line of forces, an emf is induced in conductor, the magnitude of which is proportional to strength of magnetic field and the speed of conductor. If the conductor is disc, there will be circulatory current i.e. eddy currents in disc. According to lenz law, the direction of induced emf or current in coil or conductor is such as to oppose the change in magnetic flux which produces in it. V. MAGNETIC BRAKING Figure.2. Magnetic Braking When an electrical conductor, such as copper or aluminium, moves through the field of a permanent magnet or an electromagnet,electromagnetic induction creates eddy currents, which dissipate some of the kinetic energy into Joule heat and results in slowing the motion of the conductor. This principle is utilized in the construction of magnetic brakes. This Demonstration shows magnetic braking applied to a rotating metallic disk. This might, for example, serve to control resistance to motion in exercise machines. Magnetic braking Research Article Volume 9 Issue No.4