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Author Topic: SMPS RESOURCES  (Read 30275 times)
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mhtplsh
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« Reply #25 on: April 05, 2009, 06:22:43 06:22 »

If u can go to Kolkatta in India u can get many things u require.
It is most near to u.
To best of my knowledge, few dealers in Kolkatta & Bangladesh hv  good arrangements.
Just try it. I think even dhala dealer hving contact in Kolkatta can get u the items u require.
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sohel
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« Reply #26 on: April 06, 2009, 02:49:58 14:49 »

If u can go to Kolkatta in India u can get many things u require.
It is most near to u.
To best of my knowledge, few dealers in Kolkatta & Bangladesh hv  good arrangements.
Just try it. I think even dhala dealer hving contact in Kolkatta can get u the items u require.

can u help me to get which u advice (chemical or hammer or core or drill)? which one?
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jzaghal
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« Reply #27 on: April 06, 2009, 10:59:24 22:59 »

Hi Guys,

I wish to share my little experience here.

If I want to dismantle a ferrite transformer, I usually do not use chemicals!!

Best method to use, is get yourself a small toaster oven and use it to heat up the ferrite thing.

after say ten minutes you can take the whole ferrite apart in no time.

Try to increase the temp. gradually for the first time, to see which temp. works for you??

I have success 100% all the time.

Cheers.
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download_crux
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« Reply #28 on: April 07, 2009, 01:42:56 01:42 »

hi


 try this

http://depositfiles.com/files/re9v28dqe

or

http://www.sonsivri.com/forum/index.php?topic=21821.new#new
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tAhm1D
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« Reply #29 on: April 08, 2009, 01:17:39 13:17 »

Hi,
Using chemical to dismantle a Ferrite Transformer is clearly illustrated in EPE magazine of July,2006 in page no.34. But I found the system is inefficient and could not be successful in dismantling even keeping the core for the whole night inside a pot filled with chemical. But the system mentioned by jzaghal is somehow is efficient. In that method, when I tried,my success rate was cent percent. I used slightly different method.
First, put a steel plate ( locally known as Taba, on which Chapatti is heated) on gas stove/fire. Then put few Ferrite Cores on the plate and keep on heating and after few minutes when a chit chit sound  can be heard, then remove the cores from the plate and using some cloth/glove to cover hand as the cores are heated, take the 2 parts of the Core apart safely. Use good hand gloves and use both the hands to make the Core apart with applying necessary force. In this method, you can reuse the copper wire by unwinding the wire from the Bobbin but for that you must have good patience. Hope, this will solve your problem.
« Last Edit: April 08, 2009, 01:22:31 13:22 by tAhm1D » Logged
sohel
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« Reply #30 on: April 08, 2009, 01:37:24 13:37 »

Hi Guys,

I wish to share my little experience here.

If I want to dismantle a ferrite transformer, I usually do not use chemicals!!

Best method to use, is get yourself a small toaster oven and use it to heat up the ferrite thing.

after say ten minutes you can take the whole ferrite apart in no time.

Try to increase the temp. gradually for the first time, to see which temp. works for you??

I have success 100% all the time.

Cheers.

Yes U r right, its work 110% with microwave oven  Roll Eyes Grin Cheesy
thanks
« Last Edit: April 09, 2009, 07:30:52 07:30 by sohel » Logged

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jzaghal
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« Reply #31 on: April 09, 2009, 11:58:05 11:58 »

Sohel,

I mentioned a toaster oven. I wouldn't dare put it in a microwave!!

Did you really put it in a microwave?? or are you joking!!

Cheers.
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sohel
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« Reply #32 on: April 10, 2009, 01:09:20 01:09 »

yes and not for 10 min only 40 sec . i am not joking. try it. its a very easy way without chit chit sound.
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rajudp
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« Reply #33 on: April 10, 2009, 01:59:33 01:59 »

you mean you place the all unit ( metal parts including coils and pins ) . but i heard we cant keep metal parts in microwave
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sohel
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« Reply #34 on: April 10, 2009, 02:37:30 02:37 »

which metal part u mention? surface coper plate? why u not go for expriment, my mother also afraid for her oven, then i buy one for that and test it without any damege. it works.  Grin

please note on " DANGER  Shocked High temp" if u burnt ur hand u cant claim to sonsivri.
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tAhm1D
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« Reply #35 on: April 10, 2009, 02:53:44 02:53 »

If u can go to Kolkatta in India u can get many things u require.
It is most near to u.
To best of my knowledge, few dealers in Kolkatta & Bangladesh hv  good arrangements.
Just try it. I think even dhala dealer hving contact in Kolkatta can get u the items u require.

Hi mhtplsh,
Can you please help me to find out some source for ferrite core type EE/ETD/EI in Kolkata, so that I can collect those from Kolkata. Last time I tried from Kolkata, but could not get it and hence collected from Delhi. In Bangladesh, only ETD39/ECL40 and EI 33 available. So, I had to test high power smps inverter with those using in series. But, it will be better if large sized cores are used. Please help regarding address if possible on your part. I require ETD45/55 or EE45/55 type.
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tAhm1D
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« Reply #36 on: April 10, 2009, 04:11:04 04:11 »

you mean you place the all unit ( metal parts including coils and pins ) . but i heard we cant keep metal parts in microwave

Hi rajudp,
Experiment by keeping Ferrite Core inside Microwave Oven creates a serious security hazard and should be avoided in any case. The reasons are as follows:

Microwave cannot penetrate Metal.
 Microwave cannot penetrate Metal and object like Ferrite Core. So, if you put any metal container with food inside the Microwave oven, the food cannot be heated and so the wave cannot be absorbed by the food inside. That’s why, metal container is not used inside the Microwave Oven. In this case, if you put Ferrite Core inside the Oven the serious hazard will be the resonance of the magnetron tube itself. Here,the microwave is run without an object to absorb the radiation, and hence a standing wave will form. The energy is reflected back and forth between the tube and the cooking chamber. This may cause the Magnetron tube to 'cook' itself and burn out. A serious fire hazard will be there.

Electric Currents.
Microwaves are a form of electromagnetic waves, which are oscillating electric and magnetic fields. The oscillating electric fields cause electric currents in metals and other conductors. These currents may cause harm in the  walls of the cooking chamber, which may cause fire and damage the Oven itself by  damaging the  walls of the cooking chamber.
Moreover,in this case,the severe electric field may damage the internal structure of the Ferrite Metal itself.
So, better avoid  experimenting by placing Ferrite Core inside Microwave Oven. It is very dangerous. Better use the Toaster advised by jzaghal or use electric/gas oven.


        The effects of severe electrical discharge through the metal if placed inside Microwave Oven.
« Last Edit: April 10, 2009, 04:16:56 04:16 by tAhm1D » Logged
sohel
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« Reply #37 on: April 10, 2009, 11:24:05 11:24 »

hmm

its your choice, dont test with micro oven. its true that two E55 disassemble with goodluck. its burnt small wire. please dont test it with microwave oven
and
also sorry for   exprement.
« Last Edit: April 11, 2009, 02:37:05 02:37 by sohel » Logged

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HackerNo.1
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« Reply #38 on: April 25, 2009, 11:42:16 11:42 »

Hi,
I think heating on steel plate is better system. I applied this system and successfully dismantle some EE44. According to the advice of Sohel did not try with Micro Oven.
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tAhm1D
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« Reply #39 on: July 03, 2009, 02:38:21 14:38 »

Here is a circuit for PSU for 24V @ 1.5A and 5V @ 1A. It is made using TOP246 from TOP-GX series of flyback converter ICs from Power Integrations Co. of USA. I, practically made a power supply with this circuit and still it is working fine. As it is a reliable circuit, one can try this.
I have uploaded it to ifile.it. Here is the link:

http://ifile.it/rse43zu
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tAhm1D
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« Reply #40 on: July 09, 2009, 02:49:11 02:49 »

Hi all,
Please find here a sine wave inverter made using PIC microcontroller. The context includes both hardware and software. Enjoy!

http://rapidshare.com/files/253699178/Sine_Wave_Inverter_with_PIC.PDF
« Last Edit: July 09, 2009, 02:52:46 02:52 by tAhm1D » Logged
arash_tah
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« Reply #41 on: July 13, 2009, 10:14:25 22:14 »

Hi every body
I noticed the second edition of "Switch mode Power Supply Hand book by Keith Billing" have been released. who has this new edition?  please share
REGARD
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qolpa
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« Reply #42 on: August 11, 2009, 01:59:13 01:59 »

Hi,
I am posting 3 smps archives containing Basic Ideas of different smps Topologies and very useful Circuits. Anybody interested in smps, will find different Circuits of All common Topologies and can get useful information for Practical Application.  Good Luck.

Part_1_of_SMPS_Circuits.zip
http://rapidshare.com/files/176635559/Part_1_of_SMPS_Circuits.zip

Part2_of_SMPS_Circuits.zip
http://rapidshare.com/files/176640878/Part2_of_SMPS_Circuits.zip

Part_3_of_SMPS_Circuits.zip
http://rapidshare.com/files/176646634/Part_3_of_SMPS_Circuits.zip

links dead Sad
could anyone  upload them again please?
thanks in advance

regards
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when everthing else fails, read the instructions
arash_tah
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« Reply #43 on: August 11, 2009, 09:56:10 09:56 »

Please upload again
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BRANCA
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« Reply #44 on: August 12, 2009, 08:11:06 08:11 »

for tAhm1D
Can you reup all circuits and SMPS books,especially Maniktala?No link working!
Also-maybe in your collection is available Sanjaya Maniktala  Troubleshooting Switching Power Converters.
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tAhm1D
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« Reply #45 on: August 13, 2009, 01:40:21 01:40 »

Hi Branca,
Please find herewith the Rapidshare link of what you have asked:

http://rapidshare.com/files/266816410/Troubleshooting_Switching_Power_Converters.pdf


Posted on: August 13, 2009, 08:19:17 08:19 - Automerged

Hi qolpa and arash_tah,
Here is the Rapidshare link for all 3 parts of smps_circuits:
http://rapidshare.com/files/266823505/SMPS_circuits.rar
« Last Edit: August 13, 2009, 01:42:51 01:42 by tAhm1D » Logged
BRANCA
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« Reply #46 on: August 16, 2009, 09:27:12 09:27 »

Hi tAhm1D !
Thanks for good stuff!
Sanjaya Maniktala Switching Power Supplies A to Z still missing!

Posted on: August 16, 2009, 04:06:45 16:06 - Automerged

I was lucky!Found Switching Power Supplies A to Z here:
http://rapidshare.com/files/70874042/9780750679701-0750679700.pdf.rar
http://ifile.it/49agx7/9780750679701-0750679700.pdf.rar
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G.A.Chaudhry
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« Reply #47 on: March 23, 2010, 05:52:37 05:52 »

Plz upload this book:
Power-Switching Converters  Second Edition  Simon Ang, Alejandro Oliva   CRC Press 2005
thanks in advance
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carbontracks
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« Reply #48 on: April 17, 2010, 09:25:55 09:25 »

Hi every body
I noticed the second edition of "Switch mode Power Supply Hand book by Keith Billing" have been released. who has this new edition?  please share
REGARD

I gotta second this request.  I've read his articles and they're fantastic; I'd love an entire reference book by him.

Also, the first edition link is dead.
Thanks
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mastertushar
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« Reply #49 on: May 27, 2010, 10:21:39 22:21 »

Hi, I've decided to open a thread to share some of the SMPS resources I have in my collection.

Here's a boost-circuits collection of mine:


http://rapidshare.com/files/175180866/Boost_Circuits.rar

More to come....
EDIT:NO coded links there is no need for them now, the 7 posting rule went ages agao

wizpic

links r dead can u reupload??
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