I want to construct a transformer for my solar inverter which is 3 phase 220 volt but i want to use two phases and convert it to single phase using single phase transformer. Also I want to tap this transformer at primary side that is 0-220-380v and output only 220v. I need to know the bobbin size and core size and also turn per volt if the transformer is 2kva that it is able to flow 8 amps current.

 

Do you want to wind a transformer?
Can you give a schematic of your plan?
Remember that you will be putting an unbalanced load on your invertor.

 

Do you want to wind a transformer?
Can you give a schematic of your plan?
Remember that you will be putting an unbalanced load on your invertor.

yeah actually I want to wind a transformer with 0-220-380v primary and 220v output.
2kva at most. 8 amp from secondary is fine. Just need to know the size of core and turns per volt.

 

Thumb rule calculation:
VA is proportional to Square of Core Area; 1 Sq Inch = 30 VA
1 Volt = 6 Turns.

 

A 1000 VA single phase isolation transformer from Signal weighs over 33 pounds, and you're shooting for twice that and multi-phase. At 70 pounds and bigger than a football, a very ambitious project. How do you plan to fabricate the transformer core? For this type of application, most transformer cores are many layers of stamped steel plates.

ak

 

Good luck winding the Tx