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Old 30th September 2010, 05:56 AM   #21
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Quote:
Originally Posted by metalsculptor View Post
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.
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Old 30th September 2010, 06:06 AM   #22
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Quote:
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.
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Old 30th September 2010, 07:19 AM   #23
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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.
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Old 30th September 2010, 01:39 PM   #24
star882 is offline star882  United States
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You'll need to take apart the core and remove the gap if you want to run it in forward mode.
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Old 1st October 2010, 07:48 AM   #25
coolfox is offline coolfox  Europe
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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..
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