active magnetic beraing is a mechatronic device which support rotating parts to decrease friction ,amb have less vibration it is a good topic to take as a seminar topic . there is a 12 slide to take class about 20 minutes

1. ACTIVE MAGNETIC
BEARING
AHAMMED RASIL KT
NO:5

2. INTRODUCTION
• In an ever changing world, limits of current designs are
constantly pushed further, requiring genuinely new ideas and
technologies to meet new targets
• The use of bearing is essential to all types of machines they
provide the function of supporting heavier component in a
desired position.
• Active magnetic bearings can make difference in both new
designs and redesigns of existing ones.

3. OVERVIEW
• What is AMB ?
• Principle of operation
• Merits
• Demerits
• Application
• Future advances
• Conclusion

4. WHAT IS AMB ?
• An Active Magnetic Bearing is a device which supports a rotating
shaft, without any physical contact by suspending the rotor in the air,
with an electrically controlled magnetic force.
• It is a mechatronic product which involves different fields of
engineering such as mechanical, electrical, control system, and
computer science etc.

5. PRINCIPLE OF OPERATION
• Proposed System :
Magnetic bearing works on the principle of Electromagnetic
Suspension & it consist of :
1. Electromagnetic Assembly
2. Set of Power amplifiers
3. Controller / Microprocessor
4. Gap / Position Sensor

6. PUTTING AT ALL TOGETHER
• Function principle of the Active Magnetic Bearing is shown in the fig.

7. ACTUAL WORKING
• The active electromagnetic bearing is the principle which is
actually used most often among the magnetic suspensions.
The figure above explains the components and the function of
a simple bearing. A sensor measures the displacement of the
rotor from its reference position, a microprocessor as a
controller derives a control signal from the measurement, a
power amplifier transforms this control signal into a control
current, and the control current generates the magnetic
forces within the actuating magnet in such a way that the
rotor remains in its hovering position. The control law is
responsible for the stability of the hovering state as well as
the stiffness and the damping of such a suspension

8. AMB PERFORMS :
• Lubrication Free
• Clean & Contamination Free
• Reliability
• High Surface Speed
• Low Vibration
• Low Energy
• Consumption
• Non-Contacting
• Submerged Operation

9. ADVANTAGES :
1 - Very low and predictable friction
Bearing have the ability to run without
2 - lubrication and in a vacuum
3 - Low noise and smooth ride by eliminating
physical contact surfaces can be achieved.
DISADVANTAGE :
1 - High cost
2 - Heavy weight
3 - Relatively large size

10. APPLICATIONS
• Usedin compressors ,turbines, pumps ,motors,generators.
• Usedin watt-hourmeters.
• Flywheelsalso use AMBs.
• Maglev trains.
• Artificialhearts.

11. SCOPE FOR RESEARCH
• HT-AMBs are a field of potential research.
• Electrodynamics bearing.
• Reliability of special Bearing
• Bearing Failure Analysis at dead load and live loads

12. CONCLUSION
• Through technical advances ,magnetic bearing offer
advantage for a much border range of machines and
applications design innovation related to miniaturization
,integration and standardization continue to increase the
general acceptance of magnetic bearing for many new and
existing applications setting standard for better ,smaller and
greener