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Miniature wireless power demonstrator

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ragnar

Wed Mar 10 2010, 07:54AM

Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425

Pankaj Patel wrote ...

Hi everyone,

I have done a small work on wireless power transfer so please check out this small demo video.
Where the mobile is charged, and led lamp glows wireless.

Looking very impressive sir! Do remember to cite your sources.

Pankaj Patel

Thu Mar 11 2010, 05:08AM

Registered Member #2581 Joined: Tue Dec 29 2009, 09:08AM
Location:
Posts: 18

Pankaj Patel wrote ...

Hi everyone,

I have done a small work on wireless power transfer so please check out this small demo video.
Where the mobile is charged, and led lamp glows wireless.

Looking very impressive sir! Do remember to cite your sources.

Hi sir, my design is yet now finalized there much problem in the power section of the transmitter, so wait until gets complete, then i will post all the source file for every one. Till then please wait..........

ragnar

Thu Mar 11 2010, 08:09AM

Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425

Pankaj Patel wrote ...

Hi sir, my design is yet now finalized there much problem in the power section of the transmitter, so wait until gets complete, then i will post all the source file for every one. Till then please wait..........

I'm hinting that you should acknowledge Marko's project in your writeups, as I'm sure he was a significant source of inspiration.

Skip

Fri Mar 12 2010, 05:08AM

Registered Member #2733 Joined: Thu Mar 11 2010, 11:02PM
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Posts: 2

Hi Marko, I am also doing a project on various forms of WPT. I was stuck with it especially concept of resonance, but your project has cleared some it for me, very nice experiment and good explanation prove of the concept. I now try to build the set-up . Thank you

Pankaj Patel

Fri Mar 12 2010, 05:17AM

Registered Member #2581 Joined: Tue Dec 29 2009, 09:08AM
Location:
Posts: 18

"
I'm hinting that you should acknowledge Marko's project in your writeups, as I'm sure he was a significant source of inspiration.
"

Yes i will say that marko project is best inspiration for the project, but in his design their many draw back which i am still working on to over come, and working on other concept for wireless power transmission also....... as i will get some good result i will update here.

Skip

Tue Mar 16 2010, 10:12PM

Registered Member #2733 Joined: Thu Mar 11 2010, 11:02PM
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Posts: 2

Hi Marko can I have the final PCB layout ?

Marko

Tue Apr 20 2010, 12:56PM

Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145

Hi guys,

I updated the thread with a FAQ I hope to be helpful.

Marko

Jiffycoil

Tue Apr 20 2010, 04:10PM

Registered Member #2524 Joined: Wed Dec 09 2009, 06:29AM
Location: Johns Island, South Carolina
Posts: 23

Hi Everyone,
This is my first post due to that fact that most questions I have are answered in the archives. I'm also studying many of the books that some of you have recommended to others. I built the Wireless Power project and have had a blast with it. I'm playing with the capacitance on the transmitter and receiver and trying out various antenna combinations. I'll post any findings I make here. Thanks Marko for posting this and thanks to all of you here who give so freely of your knowledge.

Marko

Thu Apr 22 2010, 07:32PM

Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145

Hello - nice work sir.

As far as I see you produced your own PCB - and if you allow me to notice some things about it...

firstly, you seem to have used closed ferrite toroids for your inductors. This is unfavorable for DC link inductors which have to carry high DC bias, and are in this case probably driven deeply into saturation. Have you had trouble with the circuit dropping from oscillation? Changing to powdered iron or ferrite rod inductors might help in that case, although if it works this way you can probably just leave it as it is.

The second thing I notice is that you used very thin copper links on your pcb to interconnect your tank caps to the copper tube loop - you didn't feel it was way too little to carry ~20A of RF current? I'm a bit surprised they aren't burning up, their resistance is probably low enough due to lots of surface area. I just tend to leave as much copper I can for that connection and solder the tube down to it...

Marko

Jiffycoil

Thu Apr 22 2010, 09:01PM

Registered Member #2524 Joined: Wed Dec 09 2009, 06:29AM
Location: Johns Island, South Carolina
Posts: 23

Hi Marko,
The toroids were some I had on hand. I wound them and checked that they measured 100uH and went with them. After reading your post I researched the different types of ferrite and their permeability. I now understand what you are saying about the inductor becoming deeply saturated. I will change them out and see if it changes the overall performance of the unit. I agree the board traces are too small. Once I started the build and began to understand what was happening in this circuit I knew they were too small. The unit has run flawlessly and the only thing thats tends to overheat is the receiver capacitor when the receiver is left too close to the transmitter for a long a period of time. I have to be honest I'm rather new to solid state Tesla coils and the building of circuits. Thanks for your remarks, I learn more everyday.

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