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Ei Core Base Inverter transformer Making

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Jakir

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I am trying to make dc-ac inverter 12VDC to 220-240VAC (50Hz).. Please tell me all the specifications i.e. no. of turns in primary and secondary, the dimensions of the core (if relevant!! current dimesions are given below), diameter of the winding coil etc.. it will be a center tapped transformer with 2 primary winding for switching purpose.. and 1 secondary winding.. i'll be use 12V 200AH battery.


Core Dimensions:

length of 'E' = 4.5 inch or 11.4 cm
width of 'E' = 3 inch or 7.6 cm
Tongue width = 1.5 inch or 3.7 cm
total core thickness 2.9 inch or 7.4 cm
 

Label your dimensions per this drawing.

Just to make sure this is a ferrite core and not a iron core?
 

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Standard stamped iron laminations, core cross section 7.4cm x 3.8cm.

At one Tesla and 50 Hz that works out to about 0.6 volts per turn.
For 240v (240/0.6 = 400) secondary will require 400 turns.
At exactly 12v, each primary half will require 12/0.6 = 20 turns. (40 turns centre tapped}.

But your battery is not going to be at exactly 12 volts, the voltage is going to be all over the place as the battery discharges.
The secondary voltage will be all over the place as well.
But for 12v square wave input, you should get 240v square wave output.
 

Standard stamped iron laminations, core cross section 7.4cm x 3.8cm.

At one Tesla and 50 Hz that works out to about 0.6 volts per turn.
For 240v (240/0.6 = 400) secondary will require 400 turns.
At exactly 12v, each primary half will require 12/0.6 = 20 turns. (40 turns centre tapped}.

But your battery is not going to be at exactly 12 volts, the voltage is going to be all over the place as the battery discharges.
The secondary voltage will be all over the place as well.
But for 12v square wave input, you should get 240v square wave output.

If primary 220VAC 50Hz & Secondary 12VDC then what is the turns by the same core dimension described above? Can make it sine wave?
 

Secondary cannot be dc !!!

Square waves or sine waves the transformer just changes the voltage according to the turns ratio.
If it has 12v rms input, and 240v rms output the ratio will be 20:1

If its 12v square wave, and 20:1 you will get a 240v square wave output.
 

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