Linked by Thom Holwerda on Fri 10th May 2013 23:40 UTC
PDAs, Cellphones, Wireless "The Lumia 928 sports a 4.5-inch AMOLED display (PureMotion HD+), 8.7MP camera (PureView, Carl Zeiss, OIS and Xenon flash), 4G LTE connectivity, wireless charging, three HAAC microphones and a loud speaker. It's an improved Lumia 920." This is the Lumia that will turn Nokia and Windows Phone around. I'm super-serious you guys!
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RE: wirless charging ..
by Luminair on Sun 12th May 2013 02:28 UTC in reply to "wirless charging .."
Luminair
Member since:
2007-03-30

I had no idea wireless charging wastes 20w 24/7, this is big news

Reply Parent Score: 1

RE[2]: wirless charging ..
by _txf_ on Sun 12th May 2013 18:03 in reply to "RE: wirless charging .."
_txf_ Member since:
2008-03-17

Whilst it is wireless charging, "contactless" would be more accurate. Seeing as the charging mechanism is magnetic coupling of two inductors, it works just like a transformer (plus resonant compensation).

Unless there is a mechanism to notify the charger to activate/deactivate then it stands to reason current has to flow through the primary at all times, leading to resistive losses in the wires and electronics.

however it seems strange to me that nobody has included said detection mechanisms...

Reply Parent Score: 2