SHRI SAI COLLEGE OF ENGG. & TECHNOLOGY, BHADRAWATI GUIDED BY: PRESENTED BY: RAHUL CHEKBANDALWAR AZHAR SHEIKH ANUP MATHANAKAR AVINASH RODE VIVEK DHOTE MR. POONAM SIR

INTRODUCTION What is magnetic levitation? Methods of producing it. Materials used Applications (wind power generation) Problems faced in conventional wind power Solution Conclusion References

MAGNETIC LEVITATION What is it? It is a method by which an object is suspended in air with no support other than magnetic fields. The electromagnetic force counteracts the effects of gravitational force. In some cases the lifting force is provided by magnetic levitation, but there is a mechanical support bearing little load that provides stability. ( pseudo levitation)

STABILITY Theories proved that it is not possible to levitate stably using only static, macroscopic, classical electromagnetic fields. Forces acting on any object are combination of gravitational, electrostatic, magneto static fields, etc. However, certain possibilities make levitation possible, example-the use of diamagnetic materials. (superconductors)

PICTURES OF DIAMAGNETIC LEVITATION This technique has been used to levitate water droplets & even live animals such as grasshopper,frog,etc.

SUPERCONDUCTORS They are perfect dia magnets (rel. permeability=0),can completely expel magnetic fields. The levitation is stabilized due to the flux pinning within the superconductor.

PROBLEMS IN CONVENTIONAL WIND TURBINE Availability of wind. Site selection. More required area. Maintenance cost. Synchronization. Life span.

SOLUTION Using Magnetic levitation based wind turbine.

WORKING:

COMPONENTS OF MAGLEV TURBINE 1. GENERATOR, 2. TURBINE, 3. MAGNETIC BEARINGS, 4. AC/DC CONVERTOR, 5. BATTERY, 6. INVERTER.

TYPES OF GENERATORS SMALL GENERATORS Require less force to turn than a larger ones, but give much lower power output. Less efficient i.e.. If you fit a large wind turbine rotor with a small generator it will be producing electricity during many hours of the year, but it will capture only a small part of the energy content of the wind at high wind speeds. LARGE GENERATORS: Very efficient at high wind speeds, but unable to turn at low wind speeds. i.e.. If the generator has larger coils, and/or a stronger internal magnet, it will require more force (mechanical) to start in motion

MAGNETIC WIND GENERATOR CHARACTERISTICS Micro-friction full permanent suspension bearings not only balance the horizontal wind pressure & vertical main load, but also have perfect stabilizing effect on axial direction of rotor system. Small start-Rotating torque: The start- Rotating torque is 28% of that of the preview same size unit. High rotating speed: the rotating speed is increased 10% under the same wind speed. High power output: the power output actual is raised evenly 20% under the same wind speed.

MAGLEV TURBINE(COMPONENTS): 1. BLADES 2. SHAFT 3. MAGNET 4. SUPERCONDUCTOR 5. MAGNETIC BEARING

MAGNETIC BEARINGS

BENEFITS: Negligible friction. Less required area. Increasing capacity. Less maintenance cost. Capital cost comparatively less. Able to utilize winds with starting speed as low as 1.5 m/sec. Life span increases..

Wind generation in India:

Energy policy of India The energy policy of India is characterized by tradeoffs between four major drivers:India Rapidly growing economy, with a need for dependable and reliable supply of electricity, gas, and petroleum products;electricitygaspetroleum Increasing household incomes, with a need for affordable and adequate supply of electricity, and clean cooking fuels; Limited domestic reserves of fossil fuels, and the need to import a vast fraction of the gas, crude oil, and petroleum product requirements, and recently the need to import coal as well; andfossil fuelscoal Indoor, urban and regional environmental impacts, necessitating the need for the adoption of cleaner fuels and cleaner technologies.

Policy framework India's strategy is the encouragement of the development of renewable sources of energy by the use of incentives by the federal and state governmentsrenewable sources of energy

Wind Power Set to Become World's Leading Energy Source The energy future belongs to wind. The world energy economy became progressively more global during the twentieth century as the world turned to oil. It promises to reverse direction and become more local during the twenty-first century as the world turns to wind, wind-generated hydrogen, and solar cells. Wind and wind-generated hydrogen will shape not only the energy sector of the global economy but the global economy itself.,

It is only within the last 20 years or so that the conversion of wind power into a renewable source of energy has become a viable option. Modern wind turbines harness the power of the wind by using rotors fitted with aerodynamic blades to turn a shaft which rotates inside the generator which will then produce green electricity. The use of wind farms (banks of turbines) is now a global phenomenon and is one of the fastest growing means of green electricity generation. Europe is the largest producer of wind power.

REFERENCES electrical A Textbook of Power system Engg. by Soni,Gupta,Bhatnagar. Power Plant Engineering by P.K. NAG. WIKIPEDIA ENCYCLOPEDIA.. Text book of elec. Engg. By B.L.THEREJA.