Electromagnetic propulsion
- Electromagnetic propulsion
Electromagnetic propulsion uses the concepts and applications of electromagnets. It includes the class of experiments and theories that have been examined for the development of advanced aerospace propulsion systems. [Robertson, G. A., Murad, P. A., & Davis, E. (2008). New frontiers in space propulsion sciences. "Energy and Conversion Management", 49, 436-452.] [Allen, J. E. (2003). Quest for novel force: a possible revolution in aerospace. "Progress in AerospaceSciences", 39, 1-60.] Technologies that make use of such applications include magnetic levitation technologies, including maglev trains, railguns, and even electromagnetic motors to some degree (though more use is made of the motor principle derived from electromagnets).
The concept of electromagnetic propulsion is no simpler than in a basic coilgun: an (preferably soft) iron core is inserted into a coil. When a diamagnetic metallic torus is placed around the core, because it cannot be magnetized, its atoms become agitated, current is produced in it (thereby producing a magnetic field), and the electromagnet produces an opposing field (in accordance with Lenz's law and the law of the conservation of energy). Because of this opposition, the ring is fired off of the electromagnet, being propelled away. Note that if such a torus is prevented from escaping the magnetic field, it will become very hot due to the induced current — This is how induction cookers work.
Uses
Electromagnetic propulsion has two main uses, one to pull or push spacecraft (which lasts for a very long time) or it can be adapted as a powerplant on earth.
Notes
3. Electro-magnetic propulsion is also highly functional in underwater applications.
4. EMS-1 - The first, basically home-made, submarine utilizing electro-magnetic propulsion was demonstrated in 1966 and was built for $2,000.00.
External links
* [http://science.howstuffworks.com/electromagnetic-propulsion.htm How Electromagnetic Propulsion Will Work]
* [http://science.howstuffworks.com/maglev-train.htm How Maglev Trains Work]
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