how do i convert 220VAC to 220VDC?

[kavermei]

Output voltage is mainly dependent on rate of fall of the primary current as per v = LdI/dT

Uhm, not quite. DC output voltage is dependent on input voltage, turns ratio, and duty cycle.

 

[metalsculptor]

DC output voltage is dependent on input voltage, turns ratio, and duty cycle.

On a forward converter yes but on a flyback converter no the forward conversion voltage is blocked by the flyback diode and only the voltage from the collapse of the magnetic field is used.

 

[metalsculptor]

Edit to my last comment, I assumed that the original circuit was flyback because an EHT transformer (television) was mentioned and traditionally there are operated in flyback mode. With switching transistors and cheap components there is no reason to run the EHT transformer in flyback mode like was the norm in valve days.

 

[star882]

You'll need to take apart the core and remove the gap if you want to run it in forward mode.

 

[coolfox]

guys ..i succeeded and this message isn't posting from heaven there was an current limiting problem with the regulator unit and i fixed it.and also i used a better trigger circuit withstanding high voltages..