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From: john1987 on 5 Jul 2010 18:46
Hi,

I need to calculate that how much power density is required on the
transmitter side coil to transmit 300mWatts of power wirelessly to
the receiving coil of radius 1inch square.Can anybody advice?

John
From: Greegor on 5 Jul 2010 19:17
On Jul 5, 5:46 pm, john1987 <conphil...(a)hotmail.com> wrote:
> Hi,
>
> I need to calculate that how much power density is required on the
> transmitter  side coil to transmit 300mWatts of power  wirelessly  to
> the receiving coil of radius 1inch square.Can anybody advice?
>
> John

power density?
From: john1987 on 5 Jul 2010 19:29


yes, watts / square meters

Thanks
From: Jamie on 5 Jul 2010 20:03
john1987 wrote:

>
> yes, watts / square meters
>
> Thanks
are you referring to the gap between the 2 coils that are not physically
on the same form, that effects the M (mutual inductance) ?



From: Paul Hovnanian P.E. on 5 Jul 2010 21:58
john1987 wrote:
>
> yes, watts / square meters

So, why did you give us the diameter in inches? Who do you think we are?
NASA?

Dp-primary = 300 mWatts power density in Watts per sq meters
----------
Ap * K

where Ap = primary (transmitter) coil area in meters^2 = 5.2E-4 for 1
inch diameter
and K = coupling coefficient

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