transformer in resonant converters

[zyrixx]

is there a difference on the transformer construction between the PWM and resonant converters? like for example, are there any difference on their wire size considerations knowing that resonant converter specifically MRCs introduce higher peaking currents.

thanks for your response.

 

[Meridian]

is there a difference on the transformer construction between the PWM and resonant converters? like for example, are there any difference on their wire size considerations knowing that resonant converter specifically MRCs introduce higher peaking currents.

thanks for your response.

Not that I'm aware of, they use the same type transformer.

 

[Awarapunshee]

The transformer used in normal converter and resonant converter will be different, because in resonant converter higher frequency is used so the core will be different. For example a 3C8 ferrite core can be used up to a maximum of 200KHz switching frequency, whereas in resonant converter higher than this frequency is used say 1MHz so a 3F1 ferrite core (for example) is used. And so on.
For the wire, higher the frequency, more will be the skin effect. So a multiple strands of wire will be used. Say for example #22 SWG wire has a current of 1A, but in SMPS, three or four wire of #28 SWG will give a good result (#28 wire withstand of 0.25A).