Details of BS7671:2018 Amendment 1 are here.

Hopefully the current types of wireless charging being trialled get designed straight back out again, as a really bad idea. There is already enough RF pollution as it is from things like badly designed solar farms without spewing stray kilowatts into the spectrum in among built up areas (current demonstrator designs have a link budget that  is about 90% - 94%  efficient, so for 10kW in, half to one kW comes out the side, just from the RF link perspective ). Right now it is only OK because uptake is very low.


results from real tests like these    are suggesting that the makers have not really got a decent grip on it.

From the measured results of charger ‘B’ between 30 MHz to 1 GHz, Fig. 17-22, we immediately observe that the level of EMI was significant and exceeded by far, especially

in the vertical polarisation, both Class A and Class B limits.

Class A is what you are allowed to do in an industrial setting, and is actually pretty rough, the lower B limit is for domestic, but even meeting this level is very far from saying it is RF quiet, just not likely to cause big problems beyond the immediate locality. Of course that assumes widely spaced sources of interference, not one in every 3rd house so you can never get far enough away.

The designers should try and meet an emission standard that allows true co-existance with other services like NB30 or DEFSTAN 59 411 before they think it is ready, embedding a network of barrage  jammers even of a few watts radiated each into the community would not really be very civilised.


Some of the  modelled levels    are hopelessly optimistic.




 

Hopefully the current types of wireless charging being trialled get designed straight back out again, as a really bad idea. There is already enough RF pollution as it is from things like badly designed solar farms without spewing stray kilowatts into the spectrum in among built up areas (current demonstrator designs have a link budget that  is about 90% - 94%  efficient, so for 10kW in, half to one kW comes out the side, just from the RF link perspective ). Right now it is only OK because uptake is very low.


results from real tests like these    are suggesting that the makers have not really got a decent grip on it.

From the measured results of charger ‘B’ between 30 MHz to 1 GHz, Fig. 17-22, we immediately observe that the level of EMI was significant and exceeded by far, especially

in the vertical polarisation, both Class A and Class B limits.

Class A is what you are allowed to do in an industrial setting, and is actually pretty rough, the lower B limit is for domestic, but even meeting this level is very far from saying it is RF quiet, just not likely to cause big problems beyond the immediate locality. Of course that assumes widely spaced sources of interference, not one in every 3rd house so you can never get far enough away.

The designers should try and meet an emission standard that allows true co-existance with other services like NB30 or DEFSTAN 59 411 before they think it is ready, embedding a network of barrage  jammers even of a few watts radiated each into the community would not really be very civilised.


Some of the  modelled levels    are hopelessly optimistic.