Do current fed converters suffer from transformer saturation

[Genome]

I've asked this before and I've still got this worry that they do.

Fair enogh the buck stage supplies what is a constant current to the
push-pull or bridge stage but that stage does not differentiate between
load and magnetising current.

Isn't it the case that flux walking can still occur if the switching
times are unbalanced?

DNA

 

[CBarn24050]

Isn't it the case that flux walking can still occur if the switching
times are unbalanced?

The flux and current have a fixed relationship, if 1 is controlled then so is
the other. In a core where you have flux walking you also have current walking.

 

[R.Legg]

"Genome" <Genome@nothere.com> wrote in message news:<eoidc.721$D%6.546@newsfe3-win.server.ntli.net>...

I've asked this before and I've still got this worry that they do.

Fair enogh the buck stage supplies what is a constant current to the
push-pull or bridge stage but that stage does not differentiate between
load and magnetising current.

Isn't it the case that flux walking can still occur if the switching
times are unbalanced?

It happens, but they don't 'suffer' as a result.

The eventual output of the constant current string must feed
capacitors (~voltage source). The slightest loss in volt-seconds on
the secondary causes a secondary current imbalance that compensates
for effects in magnetization of other windings, so long as the load
current is larger than the magnetizing current - a safe assumption in
most cases.

A modest increase in primary conduction loss and magnetizing energy
(leakage energy) is all that results. These have to be handled anyways
even in a 'perfect' circuit.

RL