From: Clint Jay <cjaysharp@gmail.com>
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Date: Wed, 5 Aug 2020 00:56:49 -0700
Subject: Re: [EE] Wireless power transmission
Thread-Topic: [EE] Wireless power transmission
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Snake oil

On Wed, 5 Aug 2020 at 06:58, RussellMc <apptechnz@gmail.com> wrote:

> On Wed, 5 Aug 2020 at 14:52, <enkitec@gmail.com> wrote:
>
> >
> >
> >
> https://emrod.energy/press-release-nz-start-up-launches-world-first-long-=
range-wireless-power-transmission/
> >
> > NZ based low loss high power low cost wireless power transmission.
>
> Whenever any sudden breakthrough is announced utilising relatively
> normal  technology
> in a new and brilliant and game changing way there are always detractors
> who claim it breaks the laws of Science and makes no engineering sense.
>
> More often than not, they are correct.
>
> *TL;DR :      I'll risk being wrong and suggest that this is close to
> rubbish, if not an elaborate con job.*
> ________________________
>
> Details provided suggest an up to "extreme line of sight" transmission in
> the "a few watts" / 10 kW entry level range with a 40 m^2 receiver panel.
> Receivers are shown in images as flat square sheets (square making little
> sense).
> Intermediate relays are said to have minimal losses.
> Currently achieved efficiencies at 10 metres are said to be about 70% but
> significant;y better is expected.
> Greatly reduced losses due to use of metamaterials [tm] at the receive en=
d
> is said to be one key to efficiency gains and overall ability.
>
> At 10 metres using near field coupling 'a few Watts' at 10 metres range i=
s
> close enough to what MIT achieved in 2007.
> The key is using "near field" magnetic coupling where there is no radiati=
ve
> power transmission.
> Power is transferred only to systems that couple (invariably resonantly) =
to
> the magnetic field.
> MITS managed about 2 metres at about 60 Watts at (AFAIR) under 50%
> efficiency.
>
> ________________________________
>
> Q&A: New Zealand's wireless power transmission: Your questions answered -
> August 4th 2020
> Quite a few highly questionable points.
>
> https://newatlas.com/energy/wireless-power-transmission-emrod-interview/
>
> For 30 m range into a 40 m^2 panel either EM radiation beam angle is abou=
t
> 0.01 degrees full beam angle (!!!) OR they are achieving near field
> coupling at 30 km or ... ?
> (The near field of the Jodrell bank dish extends beyond the atmosphere -
> big enough will do it :-) ).
>
> *Image of a receiving panel [tm] *
>
> https://assets.newatlas.com/dims4/default/60503fa/2147483647/strip/true/c=
rop/616x616+0+0/resize/616x616!/format/webp/quality/90/?url=3Dhttp%3A%2F%2F=
newatlas-brightspot.s3.amazonaws.com%2F11%2F7f%2F3869db8a4af0a3947fd0958806=
2a%2F2.jpg
>
> Long range wireless power transmission created by start up - 4 AUgust 202=
0
>
> https://www.hiddenwires.co.uk/news/article/long-range-wireless-power-tran=
smission-created-by-start-up
>
>
> Press release
>
> https://emrod.energy/press-release-nz-start-up-launches-world-first-long-=
range-wireless-power-transmission/
>
>
> Image - artists impression - receive panel
>
> https://new-zealand.globalfinder.org/image_cloud/b7d9d526-ab94-11ea-91bc-=
7bfbdd6aab04/image?full=3D1
>
> "Stuff" -
>
> https://www.stuff.co.nz/business/green-business/122266326/electricity-bea=
med-to-homes-could-do-away-with-wire-transmission-cables
>
> ____________________
>
> MIT News 2007
> Goodbye wires!
> MIT team experimentally demonstrates wireless power transfer, potentially
> useful for powering laptops, cell phones without cords
> http://news.mit.edu/2007/wireless-0607
>
> <
> https://singularityhub.com/2009/06/30/the-wireless-future-of-energy-tranf=
er/
> >The
> Wireless Future of Energy Tranfer - 2009
>
> https://singularityhub.com/2009/06/30/the-wireless-future-of-energy-tranf=
er/
>
>
> Disney
>
> https://deskarati.com/2017/02/16/wireless-power-transmission-safely-charg=
es-devices-anywhere-within-a-room/
> __________________
>
> The latest system does not APPEAR to ne a near field system - nor an EM
> system either fwiw.
>
> Tesla lit the Crystal Palace wirelessly
>
> The war over wireless power - 2011
> https://www.science20.com/science_20/war_over_wireless_power-84178
>
> Tesla 1901 -
> https://teslauniverse.com/nikola-tesla/articles/teslas-wireless-light
> Wardenclyffe - https://wiki2.org/en/Wardenclyffe_Tower
>  ??????????????????????????????
> --
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>


--=20
Clint. M0UAW IO83

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