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PROTOTYPING ECO POWER GENERATOR USING GIANT MAGNETOSTRICTION  MATERIAL
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PROTOTYPING ECO POWER GENERATOR USING GIANT MAGNETOSTRICTION MATERIAL

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PROTOTYPING ECO POWER GENERATOR USING GIANT MAGNETOSTRICTION  MATERIAL PROTOTYPING ECO POWER GENERATOR USING GIANT MAGNETOSTRICTION MATERIAL Presentation Transcript

  • PROTOTYPING ECO POWER GENERATOR USING GIANT MAGNETOSTRICTION MATERIAL
  • CONTENTS
    • INTRODUCTION
    • ENERGY HARVESTING
    • ELACTRIC POWER GENERATOR SYSTAM
    • MAGNETOSTRICTION
    • GIENT MAGNETOSTRICTION MATERIAL
    • PRINCIPLE
    • GMEG
    • EXPERIMENTAL SETUP
    • EFFECT OF PRELOADING
    • VIBRATION DEFLECTOR
    • CONCLUSION
    • REFERENCES
  • INTRODUCTION
    • Introduces designing & fabrication of alternative & renewable power generator
    • Generator uses vibration as a power source, which is easily accessible in our daily life
    • By using the reverse transduction of the material called villari effect
    • Giant magnetostriction material is used for the transduction purpose
  • ENERGY HARVESTING
    • It is the process of capturing minute amount of energy from one or more energy sources
    • This energy is storing for the later use
    • Piezoelectric material is used for this process
    • Creep problem & low susceptibility to mechanical impact are the drawbacks
    • Terfenol-D is used as a magnetostrictive material
  • ELACTRIC POWER GENERATOR SYSTAM
  • MAGNETOSTRICTION
    • Giant magnetostriction was first found in
    • TbxDy1-xFe0.2
    • APPLICATIONS
    • Positioning actuator
    • Control servo valve
    • Mobile robot
    • These applications all make use of Joule effect
    • it is a property of ferromagnetic materials
    • it causes to change the shape or dimensions of ferromagnetic material during the process of magnetization
    • When we change magnetization the magnetostrictive strain will also change until reaching its saturation value, λ
    • The effect was first identified in 1842 by James Joule
  • MAGNETOSTRICTIVE MATERIAL magnetostrictive material (inside), magnetizing coil, and magnetic enclosure completing the magnetic circuit (outside)
  • GIENT MAGNETOSTRICTION MATERIAL
    • TERFENOL-D
    • Terbium(Ter),iron(Fe), Naval Ordance Laboratory(NOL) & Dysprosium(D)
    • Developed in Naval Ordance Laboratory
    • The material widely used in academia & industries
    • It expands or contracts in a magnetic field
    • Magnetomechanical transduction ratio,Elongation,Energy density
  • CHARACTERISTIC OF TERFENOL-D
  • VILLARI EFFECT
    • Inverse magnetostrictive effect
    • variation in mechanical stress induces a proportional variation in magnetization along the direction applied stress
    • APPLICATIONS
    • vibration sensor developed by Yamamota
  • GMEG
    • Giant Magnetostriction Electric power Generator
    • It is the prototype of electric power generator using Terfenol-D
    • More electric power can generate
    • Used for low-power conception electronic devices
  •  
    • STRUCTURE
    • Based on the cage yoke type giant magnetostrictive actuator
    • It has vibration receiver section,giant magnetostrictive element & structural section
    • Effectively forms a closed magnetic circuit
  • SCHEMATIC DIAGRAM
  • EXPERIMENTAL SETUP
    • Check what level of electric power GMEG can produce
    • A force is applied to GMEG by freely dropping a metal ball(72g) from a height(250mm)
    • Terfenol-D rod used in GMEG have 10mm diameter & 25mm length
    • Voltage & current produced measured by an oscilloscope
  •  
  • RESULT
    • Maximum current & voltage observed are 214V & 0.48A
    • Instantaneous power developed is 103W
    • Generated power is proportional to the volume or weight of a giant magnetostrictive material
    • Indicates big potential of GMEG to produce electric power, much more than piezoelectric device
  • VOLTAGE & CURRENT IMPACT
  • EFFECT OF PRELOADING
    • The material consider of as an ellipse
    • When a field is applying to the ellipse model, rotating the magnetization in the direction of the field & observing a change in shape
    • magnetostriction may be increased by first applying a "preload” to the material and then applying a magnetic field
    • By rotating the ellipses perpendicular to the applied field before applying the field, the total magnetostriction is increased over the non-preloaded case
    • A similar effect can also be expected for inverse magnetostriction.
  •  
  • PRELOAD Vs OUTPUT VOLTAGE
    • Effect of preloading on GMEG was examined by varying a preload
    • 20 different choices of preload were applied to GMEG
    • A brass ball, 70g in weight, was dropped from 10cm of height ten times and the voltage outputs were averaged for respective preload choices
    • optimal preload is about 8 MPa
  •  
  • VIBRATION DEFLECTOR
    • A vibration deflector is a mechanism for changing the direction of vibration
    • e.g., from horizontal to vertical or vice versa
    • FUNCTIONL REQUIREMENT
    • (1) Changing the direction of impact forces from perpendicular to horizontal with as little energy loss as possible.
    • (2) Reducing fabrication cost by making its mechanism simple with less number of parts involved.
    • (3)Using a material of high strength and rigidity
    • Deflector uses less number of parts
    • Deflector allows GMEP to be installed away from a source of vibration
    • Delivering vibration energy from a different direction of vibration source by a design modification of a fan-shaped object
  •  
  • CONCLUSION
    • The device was capable of generating more than 100W when a brass ball of 70g in weight was dropped from 250 mm above
    • Preloading affects increases the output voltage of GMEG
    • 8MPa was an optimal choice for preloading
    • Designed and fabricated a vibration deflector for effectively transforming the forces
  • REFERENCES
    • Yamamoto,Y., Eda,H., Mori.T, Rathore.A, “Smart Vibration Sensor Using Giant Magnetostrictive Materials”, JSME International Journal, Vol. 40, No. 2, C,pp. 260-266, 1997
    • Wikipedia, the free encyclopedia
    • THANK YOU