Hi people!
I'm new at this forum. But i need to figure it out how many turns have transformer Sanken B2 marked as 42.
I have ordered PCB that shown in this video, but i don't know where to find this transformer.
Thank you all.
I'm new at this forum. But i need to figure it out how many turns have transformer Sanken B2 marked as 42.
I have ordered PCB that shown in this video, but i don't know where to find this transformer.
Thank you all.
A five-output 2 kilowatt SMPS transformer is most likely a custom build -- not 'off the shelf'. If the folks selling the design / PCBs haven't fully specified it, you're going to need to know an awful lot about switching regulator design, and especially magnetics, for this to have a happy outcome.
Best of Luck
Best of Luck
I see what you mean. Now that I've reviewed everything I could find referenced on the UTube channel, almost no specifics on the magnetics components are provided. The one exception is the secondary of the 'current transformer' for which the 'color' and measurements of the toroid, and the winding wire diameter are given -- but not the number of turns!
And judging from the 58 comments, there's plenty of interest in 2-kilowatt PFC supplies. A good percentage of the comments are requests for a redesign for different output voltages!
Sure is a beautiful PCB, though.
Cheers
And judging from the 58 comments, there's plenty of interest in 2-kilowatt PFC supplies. A good percentage of the comments are requests for a redesign for different output voltages!
Sure is a beautiful PCB, though.
Cheers
Thank you for answer. I found everything about magnetics, but i cannot find or buy Sanken B2 transformer. I tried to fit "some" transformer from power adaptor. And output voltage is 3V so i cannot use this. I don't know more info about this one transformer, but it is possible to find it in Indonesia (some sellers have offers) but no one willing to send it to Europe.
The Current "coil" / transformer is simple, full turn with 1/1.2 wire and one turn with 0.3mm wire. It works as current sensing for over-current protection.
PFC Coil could have from 100 to 380uH on 45mm core (ideal green(or chinese black) or any other for test).
EMI Filter should be 3.5mH 8-10A on Iron core (designed 1.2mm wire).
For main transformer i have formula to calculate (i just need to test it).
But Sanken B2 is blocking me and i don't know where i should find it. I don't have any specs about transformer but i have informations about used core (PQ20). But i find, those is fitted in Sony subwoofers power supplies which was available in our region. But is not now possible to find any at this time.
Do you have "some" formulas to calculate this one transformer ? i want try to wind one for test purposes.
I don't -- sorry. I've always worked it out manually, one bundle of interactive parameters at a time. But have never attempted 2-kilowatt power levels! 😱
There are quite a few much-smarter-than-me folks with web sites and other resources that could help.
Looks to me like the current transformer is not one-to-one, though. Possibly a translation issue (I'm only competent in one language!), but the secondary appears to be 'as many 0,3mm turns as will fit in one layer'.
Regards
There are quite a few much-smarter-than-me folks with web sites and other resources that could help.
Looks to me like the current transformer is not one-to-one, though. Possibly a translation issue (I'm only competent in one language!), but the secondary appears to be 'as many 0,3mm turns as will fit in one layer'.
Regards