How to cool down an SMPS transformer?

Status
Not open for further replies.
E

eem2am

Banned
Joined
Jun 22, 2008
Messages
1,179
Helped
37
Reputation
74
Reaction score
24
Trophy points
1,318
Activity points
0
if an smps transformer is heating up too much....

What are the measures that you can take to get it cooler..?

is it the following?...

1. Check winding resistance is not too high
2. Check the ferrtite material is the correct one for the switching frequency being used.
3. Check the delta(B) ...i.e. check the AC flux density is not too high.
4. Check that the core has enough surface area to cool off from.
5. Check that the core is big enough
6. Check that saturation is not occurring.
7. Check that airflow from fan (if used) is sufficient

is there anything else that could be done to achieve a cooler running SMPS transformer?
 

Yes - that is a good checklist, assuming there is no gap in the ferrite transformer the only other thing would be to look at whether the wire being used is appropriate for the frequency the Tx is being driven at, for moderate to large currents foil or litz wire is almost the only way to reduce AC wire heating (for frequencies above 35kHz approx).

If the transformer is gapped (as in a flyback) the geometry of the wingings is important so that stray field does not heat the innermost windings.
Regards, Orson Cart.
 
Reactions: eem2am

    E

    eem2am

    Points: 2
    Helpful Answer Positive Rating
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…