Yes. Bmax = 330 mt = 0.33 T = 3,300 Gauss.

 

Hello! can someone just tell me if the formula is ok? just to know! thank you

 

than k you dick cappels

 

i have a last question, is this formula correct for windings calculation? have you got an other way to calculate windings ferrite transformers?


(12X100000000)/(4X100000hzX330BmTX0,97mm²)= 9,37! is that rigth for a ETD34?
thank you!

 

You need to give us more information. For example what converter topology you need this transformer?

 

Hello jonny 130 its for a pushpull topology
thank you!

 

OK. But what about the input voltage and output voltage and load current?

 

Hello Jony130
inV=12v
outV= 330V
current= 5amp

 

Wow, this is a lot of power 330V*5A = 1.65kW
And the input current (drawn from 12 voltage source) will be larger then 1.65kW/12V = 138A.
So, unfortunately, I cannot help with this. Building such a high power converter is not an easy task.

 

why not? a 100watts or 1000Watts have the same functions! only the diameter and the core change!
but i only need a formula precisly for the numbers of windins of my etd34!

 

Hello,

The EDT34 core is not capable of providing 1650 Watts , @Jony130 mentioned.
This is what I found online about the EDT34 core:
ETD34 Switching Power Transformer Electronic Transformer
Ⅰ . ETD34 high frequency transformer size（unit：mm）
Ⅱ . ETD34 high frequency transformer performance
1.working frequency：40kHz-500KHz
2.output power：15 to 60 W
3.operating temperature：-40℃ to +125℃
4.storage temperature：-25℃ to +85℃
5.Store humidity：30 to 95%

http://www.ht-transformer.com/high-...switching-power-transformer-electronic-t.html

Bertus

 

Ok bertus lets try with etd34 how can i calculate the primary secondary windings? have you got a formula for it?
thank you

 

Hello,

With the EDT34 core, an inverter of 60 Watt is the max.
At 60 Watt and 330 Volts you will reach a current of 180 mA max.

What grade of core do you have?



Bertus

 

hello bertus i have a 3C90!

 

Hello,

Did you see this table about the mT value:



Bertus

 

yes why?

 

Hello Bertus can you help me for this formula?
thank you!

 

Hello,

Perhaps this tool will help you:
https://ferroxcube.com/en-global/design_tool/index

Bertus

 

The design process is a little "large and bulky" to be described in a forum. I know you just want to know the formula and get on with the design but you need the right formula for your design. For that, you might find the design guides at the URL below to be of help. If nothing else it will help you prepare an explanation of exactly what you need to know to get the job done.

https://www.mag-inc.com/Design/Design-Guides

Edit: Corrected URL.

 

DickCappels thank you for this site! i hope it will help me finding what i want (formula) and if result is suitable! i will take you inform!
have a nice day!