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Elevator Linear Alternator

 Electricity from elevator motion
 
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Coils consisting of a number of turns of wire and connected in sequence are run up the inside of an elevator shaft. The elevator itself is fitted with a vertical row of magnets on the outside of the cabin that will pass over the coils and generate electricity on every elevator ride. This can be used to charge a (12V?) battery bank for emergency lighting use etc.
—DoctaRa, Mar 05 2007

Elevators Control http://www.elevator...september2005_2.htm
From an elevator drive/control manufacturer [neutrinos_shadow, Mar 05 2007]

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       This is already done, using the drive motor as a generator (far more effective than a linear system, and already in place).
<-- linky
—neutrinos_shadow, Mar 05 2007
   


 

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