Showing posts with label Magnetic Levitation. Show all posts
Showing posts with label Magnetic Levitation. Show all posts

Watch Glowing Light Bulb Floating In Mid-Air !!

A combination of the two technologies--wireless power transfer and magnetic levitation--does this trick.  


Watching a thousand glowing light bulbs floating in mid-air, is no longer a distant reality. It could now be possible thanks to a project by Chris Rieger, an electrical engineering student currently enrolled at University of Queensland. What did the trick for Rieger was a combination of the two technologies called wireless power transfer and magnetic levitation. While he modified an existing circuit built by Eric Taylor for levitating the bulb, he made changes to the circuit design by Marko for building a wireless power transfer. 


Sharing the details of the project, Rieger says: "This is a project I've been working on for about six months now next to my regular studies. It is a levitating light bulb. This project came to life when i saw Jeff Lieberman's implementation of it a few months before starting. I was fascinated and started research on building my own, reading many academic papers and spending long nights reading up on pretty much every project which included wireless power transfer or magnetic leviation. What I found is that there are many many existing projects of both, but only a few have combined both these technologies. Once you have both working, it's really just a matter of overlaying them. The high frequency magnetic field generated from the wireless power transfer circuit does not effect the leviation aspect of the build."

He adds: "For the levitation system, I ended up slightly modifying an existing circuit built by Eric Taylor. My configuration is slightly different and am using a 3-pin linear hall effect sensor from RS components to act as the feedback mechanism. I opted for a 1.325mV/g sensor (the smallest sensitivity i could find), as the magnetic flux it was sensing was maxing out the reading on others. If you are looking to build one, this circuit is simple and works with only slight modification depending on the input sensor you have. The drive coil I'm using is 300 metres (1kg) of 20awg wire. It draws about 0.2 - 0.25A when stable at 12V. It doesn't seem to heat up over time, unless the light is not levitating, in which maximum (0.8A) current is driven through the coil."

To read more about this project go here : http://chrisrieger.com/LevLight.aspx
Posted by Unknown at 11:45:00 pm 0 comments
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Waterless Washing Machine


Waterless Washing Machine Cleans Laundry Through Magnetic Levitation

New inventions have made strainful works always easier for people. Let us take an example of a washing machine. In early days, people used to wash their own clothes by hand and scrub all the dirt away using a brush and detergent. Later, the washing machine was invented, which simplified laundry cleaning. The device was further developed to produce semi-cleaners and lately fully automatic washing machines.


A new concept has been introduced by a designer named Elie Ahovi, which works under the principle of magnetic levitation.


The device, named as “Laundry Orb” consists of a spherical drum that cleans clothes by scrubbing them using dry ice, instead of water. The spherical drum is basically a ring filled with batteries. These batteries produces magnetic levitation inside the ring. To levitate, a super-conductive metal laundry basket is introduced inside. A low temperature is required inside the ring. This is produced by using liquid nitrogen. A double layered shatterproof glass is also introduced inside. Thus, the whole drum levitates as soon as a magnetic field is produced. The whole process is controlled using  a touch screen interface.




The dry ice is introduced inside the ring at supersonic speeds. As soon as it hits the dirty clothes, the carbon dioxide interacts with the dirt and separates them from the clothes. The dirt is then collected and filtered out through small pores. The carbon dioxide is then removed and re-frozen. Thus, the clothes are cleaned and dry.


The cleaning process will take only a few minutes. Since no water and soap is used, the clothes are prone to look new without any wear ad tear. The environment can also be protected to a certain extent by saving soap. Besides, we can use the surplus carbon dioxide for something useful.


Though the whole concept sounds interesting, there are certain cons. The removing of carbon dioxide and refreezing it requires a lot of energy.
Posted by Unknown at 10:50:00 pm 0 comments
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