Electromagnetic Regenerative Shock Absorbers


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Energy harvesting shock absorbers

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Electromagnetic Regenerative Shock Absorbers

  1. 1. ELECTOMAGNETIC REGENERATIVE SHOCK ABSORBERS Guide: Alex Louis Assistant Professor Mechanical Engg Dept. Noufal R N S7 ME B Roll No: 09 Marian Engg Clg
  2. 2. CONTENTS  Introduction  Sources of Energy loss  Conventional Suspension Systems  Alternative ways of Regenerative Suspension  Why EM Regenerative Suspension  Electromagnetic v/s Conventional  Types  Construction  Working  Experimental setup & Result  Advantages  Disadvantages  Conclusion
  3. 3. Regenerative Shock Absorbers  Usually, only 10-16% of the fuel energy is used to drive the vehicle - to overcome the road resistance and air drag.  People have been seeking ways to improve the miles per gallon (mpg) of vehicles  Regenerative shock has the ability to continuously recover a vehicle's vibration energy that is otherwise dissipated due to road irregularities, vehicle acceleration, and braking, and further use the energy for better suspension control.
  4. 4. Sources of Energy Loss 
  5. 5. Conventional Suspension Systems
  6. 6. Alternative ways of Regenerative Suspension  Piezoelectric:- Piezo electric material is used to generate the voltage  Hydraulic:- Pressurized oil is passed through small turbine from pipes  Electromagnetic:- Electromagnetic system is based on Faraday’s Law of electromagnetic induction
  7. 7. Why Electromagnetic..??!!! Electromagnetic system is the best one because :- No heat generation due to friction Possible to implement in vehicle suspension with minimum design changes Linear design of electromagnetic energy harvester system Can harvest energy in both expansion and compression
  8. 8. Conventional V/S Regenerative
  9. 9. Different types:-  Linear-type Shock Absorbers  Rotary-type Shock Absorbers Based on the type of construction and the way of energy generation
  10. 10. Linear type Regenerative Shock Absorbers Utilize the relative motion between magnetic field and coils to directly generate power based on Faraday’s law of electromagnetic induction.
  11. 11. Construction
  12. 12. Rotary-type Shock Absorbers Transfer linear motion of suspension vibration to rotary motion to drive permanent magnetic dc generators.
  13. 13. Construction
  14. 14. Video General Working
  15. 15. Experimental Setup
  16. 16. Results mechanical effciencies with different vibration frequency, Output electrical power for different resistors at displacement input of 0.5-Hz frequency and 30-mm vibration amplitude.
  17. 17. Road Tests • Vehicle used: Chevrolet Suburban SUV (2002 model). • Test speed: 32kmph & 48 kmph
  18. 18. Result @ 32 km/hr @ 48 km/hr
  19. 19. Advantages  Improved Fuel Economy  Weight & Cost Savings  Continuous supply of Energy  Increased life of alternator  Better Handling and Comfort
  20. 20. disadvantages  System is the costly  If system breakdowns it’s very difficult and costly affair to repair it  The system is very complex  Requires high precision machinery and skilled workers to manufacture
  21. 21. Conclusion  As electromagnetic shock absorbers can be able to deliver almost continuous energy it can be used as a source of energy regenerative system  It can be installed in the vehicles with less modification in the conventional suspension systems  The amount of energy regenerated depends on the velocity of vehicle, roughness of the surfaces etc.
  22. 22. REFERENCES 1. Lei Zuo, Brian Scully, Jurgen Shestani and Yu Zhou, ‘Design and characterization of an electromagnetic energy harvester for vehicle suspensions’, Journal of Smart Materials and Structures, Volume 19, Number 4. 2. Gupta A, Jendrzejczyk J A, Mulcahy T M and Hull J R , ‘Design of electromagnetic shock absorbers’, International Journal of Mechanics & Material Design, Volume 3, Number 3. 3. Goldner R B, Zerigian P and Hull J R, ‘A preliminary study of energy recovery in vehicles by using regenerative magnetic shock absorbers’, SAE Paper #2001-01-2071. 4. Pei-Sheng Zhang and Lei Zuo, ’Energy harvesting, ride comfort, and road handling of regenerative vehicle suspensions’, ASME Journal of Vibration and Acoustics, 2012. 5. Zhen Longxin and Wei Xiaogang , ‘Structure and Performance Analysis of Regenerative Electromagnetic Shock Absorber’, Journal of networks, vol. 5, no. 12, December 2010