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.

two switch forward converter magnetics

Status
Not open for further replies.

neonwarrior

Member level 2
Joined
Dec 23, 2010
Messages
47
Helped
4
Reputation
8
Reaction score
4
Trophy points
1,288
Activity points
1,610
Hello,
The main transformer and output inductor in a two switch forward converter, do they need air gap???
 

The transformer should not need a gap, so long as the max volt-time product applied to the primary is clamped to an appropriate limit, and the duty cycle is kept under %50. For the inductor that depends completely on the design details, but in general chokes with ferrite cores will require some gap.
 
How do you clamp the volt time product?? ( using a snubber network???)
Thanks in advance
 

Clamping the volt time product is done by the controller, not by the converter circuit itself. The controller has a duty cycle clamp built in, and will always be clamped to <50%. But a volt time clamp means that the clamp level is variable, and is inversely proportional to the input supply voltage (but it's never allowed to go to more than %50, unless you have some kind of fancy active clamp circuit). Many control ICs have this stuff built in.
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top