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Can power be beamed to a motor through the air without the need for the remote machine to carry a battery?

Can power be beamed to a motor through the air without the need for the remote machine to carry a battery? If not is there R & D into this?
Lloyd Richards from Cornwall (Age 45-54)


2 Responses

  1. Hello Lloyd,

    Yes it can, and there is active research into this area, but the options are fairly limited. The most obvious source of “wireless power” is Electromagnetic Induction. This works in two steps.

    Firstly, electricity flowing through a tightly bound coil of wire will create an electromagnetic field. Secondly, another coil of wire will “conduct” the electromagnetic fields (in technical terms, “eddy currents” are generated within the coil) and turn it back into electrical current.

    It’s an extremely useful discovery and many modern inventions would not be possible without it. Here is a page about this mechanism and some applications:


    The main problem with this technique of “wireless power” is two-fold. Firstly, it’s an extremely inefficient way to generate electricity. Not only is much of the energy lost in the transfer, but the amount of induction that occurs reduces very quickly as the distance between the two coils increases. The second problem is that generating large powerful electromagnetic fields may not be great from a safety aspect and can interfere with other electronic devices.

    However, there are some alternatives. Here’s a good write-up of some current research into wireless power:


    I think this shows a little more promise of true portable power!

  2. some sort of wave power then like radio waves perhaps.

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