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A4WP gains support from an industry giant

It's not at all uncommon in the technology world for multiple organizations to be competing to become the standard for new technology. This went on in the past with the battle between Blu-ray and HD DVD among others. A new battle is brewing when it comes to wireless power with multiple organizations vying to be the standard.

The Alliance for Wireless Power (A4WP) and has added a big name to its list of supporters: Intel. “In joining A4WP, we look forward to working alongside other member companies and contributing to standards that help fuel an ecosystem of innovative solutions capable of simultaneously charging a range of devices, from low-power accessoriesto smartphones, tablets and Ultrabooks," said Navin Shenoy, Intel vice president, PC client group and general manager, mobile client platform division.

The Alliance for Wireless Power has a goal of creating a "flexible wireless power" specification wireless charging that will become an industry standard.

A4WP claims to have 50 members including some major companies in the technology realm including Broadcom, Delphi, LG Electronics, and SanDisk. The technology the company is supporting uses near field magnetic resonance charging allowing charging using a loose coupling of electromagnetic fields. The technology that A4WP is backing will allow multiple devices to be placed on a single charging pad at the same time with no need to fiddle with wires.

Competitors vying to become the industry standard for wireless charging include the Wireless Power Consortium and the Power Matters Alliance. The Wireless Power Consortium is backing technology that is already available on the market called Qi and is being used by Nokia, Samsung, and LG. The specification being pushed by the Power Matters Alliance is called Power 2.0. One of the biggest backers for the Power 2.0 standard is battery giant Duracell. The battery maker is backing Power 2.0 with its subsidiary, Powermat Technologies..

A4WP Chairman Kamil Grajski said his group aims to "[Remain] above the fray of the squabble that has broken out between first-generation players WPC and PMA" and "Has kept its eye on the next generation of [wireless charging] technologies and enhanced user experience through wireless charging spatial freedom."

Sources: Computerworld, Alliance for Wireless Power [PDF]

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RE: Lazy!
By Motoman on 6/20/2013 3:19:38 PM , Rating: 2
I don't know any way to say this more simply than this:

An A/C conversion is happening in BOTH cases. Use whatever % efficiency you want for that. Say it's 80%. Fine. BOTH the wired *and* wireless charging solutions have an A/C conversion that's 80% efficient (20% loss).

THEREFORE, if you plug your phone into the A/C adapter (as one normally would), you're experiencing 20% loss due to the A/C conversion from the wall. Or another way to look at it is 80% of the power that was delivered to your wall socket made it into your phone.

IF INSTEAD you are using a wireless charging thing of some kind, that in and of itself has a 90% transmission efficiency, you are now getting 90% of the 80% to the actual phone. Because you're ALREADY LOST 20% of your power due to the A/C conversion from the wall. 90% * 80% = 72%. 72% of the power that was delivered to your wall socket made it into your phone.

Wired: 80%

Wireless: 72%.

I can't make that any easier. You have COMPLETELY lost sight of the fact that someplace there's an A/C conversion happening that's in addition to the loss during wireless power transfer. Those losses are additive.

Ergo, wireless < wired. And thus it must always be, lest you actually are a god and can change the laws of physics.

RE: Lazy!
By BRB29 on 6/20/2013 3:45:58 PM , Rating: 2
In this capitalistic world, wireless > wired. It's all about choice and sales. People only care about power plants when their power bill skyrockets or there's no power.

People will always pick convenience. Most of us who support green only do it because it makes us feel good. The best way to save energy and resources has always been to be less materialistic and buy less. Unfortunately, if we did that then the economy would tank.

The bigger fish to fry is to convert transportation to EV. If we can do that using this tech then it'll do way more good than the inefficiency it brought us.

RE: Lazy!
By Motoman on 6/20/2013 4:09:03 PM , Rating: 2
No, it'll crash our grid and bring major cities to a grinding halt.

Once again, if you put in a new smartgrid and a whackload of more nuke plants, such that we have a highly stable distribution network and power to spare, I no longer care about this issue.

But the unavoidable fact is thatt the existing grid is seriously creaky, and literally teeters on the edge of cascade failure every day.

Yes, people routinely choose convenience over the smart choice. But in this case, not making the smart choice can actually have seriously bad ramifications for our society as a whole.

Unless you can sh1t us a new smart grid.

RE: Lazy!
By BRB29 on 6/21/2013 8:14:30 AM , Rating: 2
Our grid can more than handle EVs even if 2 million of them suddenly pop up in the next hour.
^ DOE says it can handle 180mil vehicles

The US can build a new nuclear power plants faster than automakers can pump out EVs on the market. We will not have an energy problem. Perhaps a delivery problem because some of our grids are poorly maintained.

RE: Lazy!
By Motoman on 6/21/2013 3:47:09 PM , Rating: 2

Sorry brother, but as noted our grid is precarious as it is. Google "usa rolling blackouts" for example.

Saying "we can handle X" at this point is ridiculous, when it's clear we can't handle what we have already.

Yes, we need more nukes. Build them. We need a new grid. A true smart grid. It'll cost a trillion dollars. Build it.

But no...we don't have any excess capacity right now. Significant additions to the load on our existing system is foolhardy.

RE: Lazy!
By Mint on 6/24/2013 1:57:39 AM , Rating: 2
Your link proves nothing. The California rolling blackouts in 2005, for example, happened because a transmission line went out for a reason entirely unrelated to electricity demand. High usage already has a feedback mechanism with utilities charging notifying businesses of days that demand is expected to be higher (and hence prices will be high).

The US absolutely has excess capacity. There's over 1000 GW of generation capacity:
Average consumption is 450 GW.
Peak consumption is 782 GW:

Near field wireless power is not going to be used for major appliances, because it costs too much. It only makes sense for things that move around a lot, like cell phones or tablets. If every household in the US charged 100 Wh of batteries a day wirelessly, then 10% loss would add up to a 0.01% increase in grid load.

So stop whining.

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