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

How to wind dual output flyback transformer?

Status
Not open for further replies.
E

eem2am

Banned
Advanced Member level 4
Joined
Jun 22, 2008
Messages
1,179
Helped
37
Reputation
74
Reaction score
24
Trophy points
1,318
Activity points
0
I am doing 230VAC, isolated flyback. (43W)

It has a 16V rail
-and a 5.8V rail.

They are autotransformer wound, and weighted feedback is taken from each rail.

(70% TO 5.8V rail; 30% to 16V rail)

In order to get best cross-coupling, should i ............

wind the whole winding in one layer.?

or....

should i wind the first 5.8V windings over one whole layer...........and then wind the remaining turns fully filling the next layer?

(i.e. the secondary is a split winding, with the 5V8 rail being tapped off)
 

its always better if you split the winding to achieve good cross coupling.It also reduces the leakage inductance.
 
  • Like
Reactions: eem2am

    E

    eem2am

    Points: 2
    Helpful Answer Positive Rating
There's a detailed discussion of leak inductance and self capacitances involved with different windings geometries in Snelling, Soft Ferrites, Chapter 11 Properties of Windings. Unfortunately I'm not aware of any presently available text book of similar quality.

P.S.: Some good stuff can be found in the TI (former Unitrode) Magnetic Design Handbook:
2001 Magnetics Design Handbook - MAG100A
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top