HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Guest Blogs
Benefits of Direct Charging Design in Wireless Power
3/8/2013

< Previous   Image 2 of 4      Next >

Figure 2: Power receiver block diagram -- Power losses within the receiver.
Figure 2: Power receiver block diagram -- Power losses within the receiver.

< Previous   Image 2 of 4      Next >

Return to Article

View Comments: Newest First|Oldest First|Threaded View
Jack Rupert, PE
User Rank
Platinum
Re: Efficiency & technology questions
Jack Rupert, PE   3/25/2013 3:52:20 PM
NO RATINGS
Taking Chuck's question one step further, besides the additional applications, what are the realistic distances that can be expected in the near future before the costs get prohbitive?

William K.
User Rank
Platinum
So what is the actual efficiency of wireless charging?
William K.   3/11/2013 3:13:14 PM
NO RATINGS
At least this article did define the expression for the system efficiency of the charging system, even if it did not give any numbers. I am sure that if the actual efficiency were stated that the whole concept would lose a whole lot of support. Ff course, it is a "really neat gimmick", there is no question about that, but the amount of wasted power plus the large magnetic fields should really be considered as part of the package. But thye promotors are quite aware of those numbers, which is why they are not typically displayed.

apresher
User Rank
Blogger
WiTricity
apresher   3/11/2013 11:30:54 AM
NO RATINGS
Interesting technology that is definitely important going forward.  Thought some would like this link to an explanation of WiTricity technology.

http://www.witricity.com/pages/technology.html

Charles Murray
User Rank
Blogger
Re: Efficiency & technology questions
Charles Murray   3/8/2013 6:51:23 PM
NO RATINGS
I agree with eafpres: It is indeed an important article for our readership. Aside from cell phones, Tahar, can you tell us some of the biggest applications for this technology going forward? Coincidently, Design News has an article coming up involving wireless chaging of a piece of sports equipment, which also involves TI.  

Cabe Atwell
User Rank
Blogger
Re: Wireless charging
Cabe Atwell   3/8/2013 5:03:40 PM
NO RATINGS
I'm with Eafpres on the magnetic resonance coupling. Distance is not as big of an issue. TI should get on it. (see "witricity" for more)

When I first used wireless charging with the old Palm webOS phones, I loved it. I know that the charging base (Tx) is still tether to the wall, and you place the device (Rx) on it and so the device is still tetherd, I liked the idea of setting it down freely. It is silly to use a transformer coupler like this for using a device in bed/leasure. I would still use a plug. Any other time...it's the way to go.

My HP (webOS) Touchpad wirelessly charges to my left, right now.

C

warren@fourward.com
User Rank
Platinum
Wireless charging
warren@fourward.com   3/8/2013 11:03:29 AM
NO RATINGS
If we could just focus low frequency energy as we do microwaves we could increase efficiency.  So the answer may be in higher frequencies, but that also causes problems.  And a dish large enough to handle 60 Hz would not fit in most cities, and thus be a bit impractical.  But, it may be inefficient the way it is now, and surely can be improved, but hey, it works!  And it sure is convenient!.

eafpres
User Rank
Gold
Efficiency & technology questions
eafpres   3/8/2013 10:25:52 AM
NO RATINGS
Hi Tahar--nice article, it seems to me that TI is really leading the world in integrated solutions for all kinds of front ends, energy harvesting, low power, and wireless applications, to name a few.

I was interested in the last part of your note; I have the impression the integrated IC you note saves board space, design time, and cost, but probably does not improve electrical efficiency.  Can you clarify that?

Also, I have heard a little bit about various competing wireless charging standards; in particular I heard about a magnetic resonance technique, which I suppose is different in the mechanism of power transfer. Is TI working on any solutions for this or other wireless charging approaches?

Partner Zone
More Blogs from Guest Blogs
Manufacturers of plastic parts recognize the potential of conformal cooling to reduce molding cycle times. Problem is, conformal molds require additive manufacturing (AM), and technologies in that space are still evolving. Costs also can be high, and beyond that, many manufacturing organizations lack the knowledge and expertise needed to apply and incorporate additive technologies into their operations.
Machine vision and video streaming systems are used for a variety of purposes, and each has applications for which it is best suited. This denotes that there are differences between them, and these differences can be categorized as the type of lenses used, the resolution of imaging elements, and the underlying software used to interpret the data.
In the face of growing challenges for embedded technology engineers, designers should actually be designing for a new IoT -- the Internet of Tomorrow.
As today’s product design cycles are held to tighter schedules and budget constraints, it’s becoming even more critical to consider human factors up front to catch and fix problems during the initial development stages, when it’s faster and less costly to do so. Overlooking human factors at the beginning of the design cycle could lead to poor user experience, a decrease in effective product performance, and an increase in safety risk to the user.
Plastic part manufacturers are always looking for ways to reduce cycle time and get more productivity out of their injection molding machinery. One of the longstanding constraints in injection molding production has been cooling time. Removing parts from the mold before they have cooled induces warping or shrinking. But wait time works against productivity.
Design News Webinar Series
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
5/7/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
May 4 - 8, Designing Low Power Systems using Battery and Energy Harvesting Energy Sources
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Proto Labs
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service