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F/OEngineeringandTechnology
JamiaMilliaIslamia
1
Mahindra Igniters
Independent Suspension
• Greater ride comfort,
• Safer
• Stable on/off road
• Better traction
Beam Axle ...
Electromagnetic
Suspension System
Prepared by
Bilal Hasan Syed
6th Semester
B.Tech Mechanical Engg.
Jamia Millia Islamia
M...
Classification of suspension
systems
Suspension
system
Active
Hydraulic
Pneumatic
Electro-
magnetic
Passive
F/OEngineering...
Hydraulic Suspension System
Examples of vehicles employing this technology
• BMW has recently developed an antiroll contro...
Hydraulic Suspension System
F/OEngineeringandTechnology
JamiaMilliaIslamia
6
Fig no. 1 ARC system of BMW using a hydraulic...
Hydraulic/Pneumatic
Suspension System
Advantages are
• Very high force density
• Ease of control
• Ease of Design
• Commer...
Hydraulic/Pneumatic
Suspension System
Disadvantages are
• considered inefficient due to the required continuously
pressuri...
Electro-magnetic Suspension
System
Basic Idea
Magnetic repulsion can be used to absorb shocks. And since
response to input...
Electro-magnetic Suspension
System
F/OEngineeringandTechnology
JamiaMilliaIslamia
10
Overcomes the disadvantages of hydro/...
Bose Suspension System
It consists of
• Linear electro magnetic motors attached on each wheel,
• Power amplifiers at each ...
Bose Suspension System
This suspension system requires less than a third of the power
of a typical vehicle’s air-condition...
Bose Suspension System
F/OEngineeringandTechnology
JamiaMilliaIslamia
13
Fig no. 2- Bose Suspension System
Driving through curves
F/OEngineeringandTechnology
JamiaMilliaIslamia
14
Driving through long Bumps
F/OEngineeringandTechnology
JamiaMilliaIslamia
15
Bose Suspension System
The disadvantages are as follows:
• Increased volume of the suspension, since the force density of
...
Proposed Design
F/OEngineeringandTechnology
JamiaMilliaIslamia
17
Basic Idea
To combine the use of both Active and Passive...
Proposed Design
General Modification
For an electromagnetic coil to be used in a Macpherson type of
suspension system, its...
Proposed Design
General Modification
It has to be made into a cylindrical shape or moreover a tubular
shape so that it can...
Proposed Design
F/OEngineeringandTechnology
JamiaMilliaIslamia
20
Coil spring
Passive
damper
Permanent
Magnets
Bump stop
E...
Proposed Design
Working
When the vehicle moves on the road the irregularities are sensed by
the control unit sensors. Powe...
Proposed Design
Safety
In general, the contact with the road surface is increased. When a
car turns through corner or curv...
Proposed Design
Limitation
• A lot of research still has to be done to bring this design into
usable technology
• In gener...
Conclusion
• Active suspension offers many benefits over conventional and
semi-active suspension systems
• Electromagnetic...
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Electromagnetic suspension system

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this is a type active suspension system. the presentation was 1st runner up for Mahindra automobiles india lmt. competition on solution to the better suspension system for sedans. few other types have also been discussed.

Published in: Automotive, Business, Technology
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  • i Arshdeep Singh,mechanical engg,i want to make project on electromagnetic suspension system.plz help me to do so how we can make the suspension control unit plz give me some detail on it
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Electromagnetic suspension system

  1. 1. F/OEngineeringandTechnology JamiaMilliaIslamia 1
  2. 2. Mahindra Igniters Independent Suspension • Greater ride comfort, • Safer • Stable on/off road • Better traction Beam Axle Suspension • Simple in Construction • Inexpensive • Greater loading capacity • Low self weight F/OEngineeringandTechnology JamiaMilliaIslamia 2
  3. 3. Electromagnetic Suspension System Prepared by Bilal Hasan Syed 6th Semester B.Tech Mechanical Engg. Jamia Millia Islamia Mahindra Igniters Solution
  4. 4. Classification of suspension systems Suspension system Active Hydraulic Pneumatic Electro- magnetic Passive F/OEngineeringandTechnology JamiaMilliaIslamia 4
  5. 5. Hydraulic Suspension System Examples of vehicles employing this technology • BMW has recently developed an antiroll control (BMW-ARC) system by placing a hydraulic rotary actuator in the center of the antiroll bar at the rear of the vehicle as shown on figure in next slide. • Mercedes has developed an Active Body Control System, which uses high-pressure hydraulics to pre-stress the spring, hence generating antiroll forces without coupling the left and right wheels (as in the case of an antiroll bar). F/OEngineeringandTechnology JamiaMilliaIslamia 5
  6. 6. Hydraulic Suspension System F/OEngineeringandTechnology JamiaMilliaIslamia 6 Fig no. 1 ARC system of BMW using a hydraulic rotary actuator
  7. 7. Hydraulic/Pneumatic Suspension System Advantages are • Very high force density • Ease of control • Ease of Design • Commercial availability of various parts • Reliability • Commercial Maturity F/OEngineeringandTechnology JamiaMilliaIslamia 7
  8. 8. Hydraulic/Pneumatic Suspension System Disadvantages are • considered inefficient due to the required continuously pressurized system; • relatively high system time constant (pressure loss and flexible hoses); • environmental pollution due to hose leaks and ruptures, where hydraulic fluids are toxic; • mass and intractable space requirements of the total system, including supply system, even though it mainly contributes to the sprung mass. F/OEngineeringandTechnology JamiaMilliaIslamia 8
  9. 9. Electro-magnetic Suspension System Basic Idea Magnetic repulsion can be used to absorb shocks. And since response to input signals is very fast in electro-magnetic induction motors, its use can give beneficial results. Linear motion can be achieved by an electric rotary motor with a ball screw or other transducers to transform rotary motion to linear translation. However, the mechanism required to make this conversion introduces significant complications to the system. These complications include backlash and increased mass of the moving part due to connecting transducers or gears that convert rotary motion to linear motion (enabling active suspension). F/OEngineeringandTechnology JamiaMilliaIslamia 9
  10. 10. Electro-magnetic Suspension System F/OEngineeringandTechnology JamiaMilliaIslamia 10 Overcomes the disadvantages of hydro/pneumatic suspension as follows- • No need for continuous power, • Ease of control, • Absence of fluids • Relatively high Bandwidth (tens of hertz)
  11. 11. Bose Suspension System It consists of • Linear electro magnetic motors attached on each wheel, • Power amplifiers at each wheel, • A set of control algorithms. Working • This linear electromagnetic motor responds quickly enough to counter the effects of bumps and potholes while maintaining a comfortable ride. • Electrical power is delivered to the motor by a power amplifier in response to signals from the control algorithms. • The bidirectional power amplifier allows power to flow into the linear electromagnetic motor and allows power to be returned from the motor. F/OEngineeringandTechnology JamiaMilliaIslamia 11 - An application of EM suspension
  12. 12. Bose Suspension System This suspension system requires less than a third of the power of a typical vehicle’s air-conditioning system, i.e., hundreds of watts. Compared with hydraulic actuators, the main advantages of electromagnetic actuators are as follows: • Increased efficiency, • Improved dynamic behavior, • Stability improvement, • Accurate force control, • Dual operation of the actuator. F/OEngineeringandTechnology JamiaMilliaIslamia 12
  13. 13. Bose Suspension System F/OEngineeringandTechnology JamiaMilliaIslamia 13 Fig no. 2- Bose Suspension System
  14. 14. Driving through curves F/OEngineeringandTechnology JamiaMilliaIslamia 14
  15. 15. Driving through long Bumps F/OEngineeringandTechnology JamiaMilliaIslamia 15
  16. 16. Bose Suspension System The disadvantages are as follows: • Increased volume of the suspension, since the force density of the active part of hydraulics is higher than for electromagnetic actuation, i.e., system mass and volume could be less; • Relatively high current for a 12- to 14-V system; • Conventional designs that need excitation to provide a continuous force; • Higher system costs. F/OEngineeringandTechnology JamiaMilliaIslamia 16
  17. 17. Proposed Design F/OEngineeringandTechnology JamiaMilliaIslamia 17 Basic Idea To combine the use of both Active and Passive suspension. The general Macpherson system can be used and the passive shock absorber can be replaced by electromagnetic dampers. Basic Components • Electromagnetic Damper • Passive Coil Spring • Power supplier • Control Unit
  18. 18. Proposed Design General Modification For an electromagnetic coil to be used in a Macpherson type of suspension system, its shape has to be modified. F/OEngineeringandTechnology JamiaMilliaIslamia 18 F Fig no. 3 Linear Electromagnetic coil of Bose System
  19. 19. Proposed Design General Modification It has to be made into a cylindrical shape or moreover a tubular shape so that it can be adjusted in Macpherson system. F/OEngineeringandTechnology JamiaMilliaIslamia 19 F Fig no. 4 coil shape of the proposed design
  20. 20. Proposed Design F/OEngineeringandTechnology JamiaMilliaIslamia 20 Coil spring Passive damper Permanent Magnets Bump stop Encoder Shaft 3 phase Coil Coil springs Permanent magnets (A) (B) (C) Fig no. 5 Suspension struts. (a) Passive. (b) Active interior-magnet TPMA, (c) Active exterior-magnet TPMA.
  21. 21. Proposed Design Working When the vehicle moves on the road the irregularities are sensed by the control unit sensors. Power is supplied by the to EM dampers. Signals are sent to Electromagnetic dampers which extend/withdraw according to need. Wheels would then trace the path of irregularity. Entire process would take fractions of second to initiate. The extra shocks would be absorbed by the passive coil spring. Power Regeneration The bidirectional power supplies allows power to flow into the tubular electromagnetic motor and allows power to be returned from the motor. For example, when the suspension encounters a pothole, power is used to extend the motor and isolate the vehicle’s occupants from the disturbance. On the far side of the pothole, the motor operates as a generator and returns the power back through the supplies. F/OEngineeringandTechnology JamiaMilliaIslamia 21
  22. 22. Proposed Design Safety In general, the contact with the road surface is increased. When a car turns through corner or curves, the effect of body roll is almost eliminated. This would decrease the chance to topple over the sides making it safer for the passenger. Also the smoother movement of the vehicle, would prevent damage of the mechanical parts. Thus, making safer for the parts of vehicle. Ride-Comfort The fast response of this system, is able to cancel out the vibration up to a very large extent making it very comfortable. Fail Safe Even if the power supply fails, the passive spring would still absorb the shocks and the regenerative power would help run the EM damper. F/OEngineeringandTechnology JamiaMilliaIslamia 22
  23. 23. Proposed Design Limitation • A lot of research still has to be done to bring this design into usable technology • In general, the entire system installation cost is expected to be quiet high. Cost Cut-outs • Comparing to Bose system only a shock absorber has to be changed, hence cost compared to Bose sys should be less. • Operating cost is less, since comparatively a low power is required to operate. • Comparing to active hydraulic system, its cost would be very less. (no use of compressors, lesser power consumption) • On observing level of comfort, safety and loading; compensation could be made. F/OEngineeringandTechnology JamiaMilliaIslamia 23
  24. 24. Conclusion • Active suspension offers many benefits over conventional and semi-active suspension systems • Electromagnetic suspension is a high bandwidth and efficient solution for improving handling and comfort • Proposed design of tubular permanent magnet coil in dampers offers a high force density and fail-safe solution. F/OEngineeringandTechnology JamiaMilliaIslamia 24

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