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# Electromagnetic brake

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This presentation is all about on electromagnetic brakes which deals with technology and uses in real world

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### Electromagnetic brake

1. 1. Electromagnetic brake BY Rajesh kumar -
2. 2. INTRODUCTION Electromagnetic brakes operate electrically, but transmit torque mechanically.  This is why they used to be referred to as electro- mechanical brakes.
3. 3. Part of electromagnetic brake  Field  Armature  Hub
4. 4. Basic Operation Voltage/Current - And the Magnetic Field The magnetic field that is generated in the wire, from the current, is known as the “right hand thumb rule.
5. 5. Burnishing - What Is It and Why Is It Important? Burnishing is the wearing or mating of oppos ing surfaces. When the armature and brake faces are produced, the faces are machined as flat as possible. 5
6. 6. Torque When considering torque, the question of using dynamic or static torque for the application is key?
7. 7. •For example, if running a machine at relatively low rpm (5 – 50 depending upon size) there is minimal concern with dynamic torque since the static torque rating of the brake will come closest to where it is running.
8. 8. Over Excitation Over excitation is used to achieve a faster response time. It’s when a coil momentarily receives a higher voltage then its nominal rating.
9. 9. •Three times the voltage typically gives around 1/3 faster response. •With over excitation the in rush voltage is momentary.
10. 10. Wear It is very rare that a coil would just stop work ing in an electromagnetic brake. The main wear in electromagnetic brakes occurs on the faces of the mating surfaces . Every time a brake is engaged during rotation a certain amount of energy is transferred as heat.
11. 11. Example of electromagnetic brake Electromagnetic Power Off Brake
12. 12. • Electromagnetic Particle Brake
13. 13. THANK YOU…!