Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

I need help with this charger

Status
Not open for further replies.
A

adewaledipo

Junior Member level 1
Joined
Aug 31, 2007
Messages
15
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,354
**broken link removed**



After designing this charger, it worked but the ferrite transformer was getting so hot.

My ferrite transformer winding is 27 turns primary and 6 turns secondary
 
Last edited by a moderator:

this seems quite a popular design.... it pops upi all the time on this forum.

which transformer are you talking about ? And which core & size are you using ? And why are your turns ratios different ?
 

kripacharya said:
this seems quite a popular design.... it pops upi all the time on this forum.

which transformer are you talking about ? And which core & size are you using ? And why are your turns ratios different ?
Click to expand...

Thanks for your quick reply. I live in Nigeria and it is so hard for us here to get core sizes we want so I made do with one from a smps unit I bought here. I recoiled it to that spec so as to accommodate more stress. And I am using it to supply 12v dc. Pls advice. Thanks
 

Mr ade is it only the core that is heating up or with your mosfet?
 
Last edited:

This design suffers from the danger that if the two half of the secondary are not perfectly balance the difference in voltage will result in a a current flowing back through the smoothing capacitors (the 4 X 47000). this will result in dissipation in the transformer/diodes/capacitors.
Frank
 

Ok but I did not recoil the secondary transformer as in the circuit
 

I think you problem there could be from your transformer.
 

I finally pulled a transformer from an atx power pack and am in the process of getting it fully installed
 

The circuit is a popular design check the frequency for 60Khz if it is ok then Check Transformer
 

Pictures of the new design. Please comment. I have tested the circuit without the chopper transformer, everything works well. I am going to test it with the chopper tomorrow.

- - - Updated - - -



 
Last edited by a moderator:

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top