Qualcomm demonstrates dynamic charging of EVs on the go

[outwar6010]

What waste? The energy is starting to come more and more from just renewables and I'm sure the energy only transfers when theres a car there.

[Xlucine]

It's emitting all kinds of interesting EM waves, so the power going into the car is less than the power going into the coil. This means it takes more power to charge the car than plugging it in, and wind turbines aren't free.

[Biscuit]

It's emitting all kinds of interesting EM waves, so the power going into the car is less than the power going into the coil. This means it takes more power to charge the car than plugging it in, and wind turbines aren't free.

Id stick take all that over running out of fossil fuels.

Progress is never immediately perfect.

[qasdfdsaq]

My 7 year old HP touchpad has inductively coupled charging.

Charging of what? Your fingers?

More angry with the idea of unnecessary waste. Plugging a USB cable in is only less convenient than setting a phone down on an inductive charging pad by a minuscule degree, especially if you have a phone dock.

Using a wireless charger is only less efficient than plugging a phone into USB by a miniscule degree. If you want to whine about efficiency, whine about all the fifty different fast charging standards being implemented, or everyone using a portable charger/battery pack/car/vehicle charger, because those are twice as inefficient as wireless charging.


Lack of beamforming also means >99.99999% of power transmitted by your phone over the mobile network is wasted but I don't see people whinging about that... You could literally increase efficiency by 200% by implementing decades old technology, but instead people whine about 10% efficiency loss from a wireless charger....

It's emitting all kinds of interesting EM waves, so the power going into the car is less than the power going into the coil. This means it takes more power to charge the car than plugging it in, and wind turbines aren't free.

So does turning on your phone screen. Or starting the car engine. I mean the whole mechanism with which electric motors work is by emitting thousands of watts of EM waves.
(Though some people do still whinge about "radiation" going into your brain from phones)

This reminds me of people protesting against maglev train technology because of "OMG teh radiation/EM waves yadda yadda!" oblivious to the fact their refrigerator exposes them to more EM radiation on a daily basis.

[peterb]

Charging of what? Your fingers?

The internal battery

Lack of beamforming also means >99.99999% of power transmitted by your phone over the mobile network is wasted but I don't see people whinging about that... You could literally increase efficiency by 200% by implementing decades old technology, but instead people whine about 10% efficiency loss from a wireless charger....

Except that an omnidirectional radiation pattern is essential for the concept of a cellular based system. It is meant to be a many to many communication system - having a directional antenna tat needed to be accurately lined up with a base station would make it pretty useless.

[qasdfdsaq]

The internal battery

Oh, wireless trackpad? I was thinking laptop built-in trackpad or something. Yeah, that makes sense.

Except that an omnidirectional radiation pattern is essential for the concept of a cellular based system. It is meant to be a many to many communication system - having a directional antenna tat needed to be accurately lined up with a base station would make it pretty useless.

Excepting the fact that all modern networks use highly directional antennas anyway (google sectored base station), only the beacons ever have to be "omnidirectional" and/or reach multiple users. Nearly all traffic aside from the "Network is here" beacons are directed to one handset and one handset only.

Also you seem to have completely missed the point of beamforming. The whole point is it electronically adapts to point the signal in whatever direction it is needed regardless of the orientation of the device and has nothing to do with directional antennas. It's used in the majority of modern laptops and tablets devices to improve your WiFi signal but not used in most phones.