Flyback transformer Turns canculation and gap length

Status
Not open for further replies.
P

phobos1

Full Member level 2
Joined
Jan 18, 2010
Messages
135
Helped
15
Reputation
30
Reaction score
15
Trophy points
1,298
Location
Salem, Tamil Nadu, India
Activity points
2,112
I read about designing flyback transformer desing from abraham pressman book I have ungapped ferrite core how can i get the required primary inductance. someone tell me how can i determine the gap length and number of turns.
 

I read about designing flyback transformer desing from abraham pressman book I have ungapped ferrite core how can i get the required primary inductance. someone tell me how can i determine the gap length and number of turns.
Click to expand...
Hi phobos1
If you've followed the Pressman book then you would know that it deals with gap calculations too . page 135 . 137 ,138 , till 145 ! But in fact , most of the times i prefer to use 1 mm as gap , but if my current is going to be high , i increase the gap . ( using experience and trial and error instead calculations of gap ! )
I have ungapped ferrite core how can i get the required primary inductance
Click to expand...
Pressman's book has some design examples . you can see them . ( as you mentioned you have access to this book so you can read it's design examples ) . and also marty brown's book has some design examples . and there are many application notes and design ides in google . did you try to search for them ?
Best Wishes
Goldsmith
 
Hi gold smith i got my flyback transformer running but the primary current keeps increasing by 1ma step slowly is it right
 

Hi gold smith i got my flyback transformer running but the primary current keeps increasing by 1ma step slowly is it right
Click to expand...
Hi phobos1
What do you mean by running by 1 ma step slowly ? is that mean that when you have putted the load across the output , then the current is not in the value that it should be ? and then it is increasing as steps ? or perhaps i've misunderstood your meaning ? more information is required .
By the way can you show me your schematic ? perhaps you have used a current limiter for that and it is improper ? are you using a current mode flyback converter ?

Best Wishes
Goldsmith
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…