Hz2020
Member level 3
Hello Guys,
This is my 15V 10A Hlaf Bridge SMPS![DSC01367.JPG DSC01367.JPG](https://www.edaboard.com/data/attachments/27/27264-4de7bbef2fc33cb3c10b22b08981fb15.jpg)
Here are some measurements and the schematic
![X.png X.png](https://www.edaboard.com/data/attachments/27/27265-74407d942b8d26deb95195de111cd2e5.jpg)
![DSC01360.JPG DSC01360.JPG](https://www.edaboard.com/data/attachments/27/27266-841c1a7b85a3f8a504f62be614e3d4dd.jpg)
![DSC01361.JPG DSC01361.JPG](https://www.edaboard.com/data/attachments/27/27267-3f089d2ab36b9e37be87897e6b2b4222.jpg)
![DSC01359.JPG DSC01359.JPG](https://www.edaboard.com/data/attachments/27/27268-4af62a7fff3956e92a5330b6da2ae87c.jpg)
this project is not completed, as it has no feed back.
i can adjust the output voltage using the dead time control of the tl494.
Before listing my problems, Any Notes about the scheme or the circuit ?
Now, my problems are:
1) The Output Filter "LC".
The output of the PS suffering from some ripples and i cant eliminate them using the filter circuit
i tried to use the formulas of output filter of my book "POWER SUPPLY COOKBOOK Marty Brown"![output filter formula.png output filter formula.png](https://www.edaboard.com/data/attachments/27/27269-0f81221a2f0ca51dbed8a922a2a7e5f5.jpg)
but there are alot of ripples in the output.
can i use snubber circuit across the transformer secondary side to solve this problem? or what can i do to solve the problem?
2) The feedback
i tried to make isolated feedback but there are some problems.
I prefer to solve the first problem before starting the 2nd problem details.
thanks in advance,
Hz
This is my 15V 10A Hlaf Bridge SMPS
![DSC01367.JPG DSC01367.JPG](https://www.edaboard.com/data/attachments/27/27264-4de7bbef2fc33cb3c10b22b08981fb15.jpg)
Here are some measurements and the schematic
![X.png X.png](https://www.edaboard.com/data/attachments/27/27265-74407d942b8d26deb95195de111cd2e5.jpg)
![DSC01360.JPG DSC01360.JPG](https://www.edaboard.com/data/attachments/27/27266-841c1a7b85a3f8a504f62be614e3d4dd.jpg)
![DSC01361.JPG DSC01361.JPG](https://www.edaboard.com/data/attachments/27/27267-3f089d2ab36b9e37be87897e6b2b4222.jpg)
![DSC01359.JPG DSC01359.JPG](https://www.edaboard.com/data/attachments/27/27268-4af62a7fff3956e92a5330b6da2ae87c.jpg)
this project is not completed, as it has no feed back.
i can adjust the output voltage using the dead time control of the tl494.
Before listing my problems, Any Notes about the scheme or the circuit ?
Now, my problems are:
1) The Output Filter "LC".
The output of the PS suffering from some ripples and i cant eliminate them using the filter circuit
i tried to use the formulas of output filter of my book "POWER SUPPLY COOKBOOK Marty Brown"
![output filter formula.png output filter formula.png](https://www.edaboard.com/data/attachments/27/27269-0f81221a2f0ca51dbed8a922a2a7e5f5.jpg)
but there are alot of ripples in the output.
can i use snubber circuit across the transformer secondary side to solve this problem? or what can i do to solve the problem?
2) The feedback
i tried to make isolated feedback but there are some problems.
I prefer to solve the first problem before starting the 2nd problem details.
thanks in advance,
Hz