aliasgherman
Newbie level 3
Dear Experts,
I am having problems in driving a center tapped transformer via a push pull converter. No matter what turn ratio I use, (with switching frequency = 58kHz) the output voltages are always too high. And the input current is extremely high (at very low output loads the current >= 9A).
I suspect that the issue is related to transformer (toroidal core transformer with turns ration 60:30, 20:10, 40:20 are tried but to no success). My reason for suspecting transformer is that if I use a simple 50Hz transformer, I get a smooth output voltage (similar to the pwm - based inverters just that I dont get a sin wav output) and am able to drive little bulbs.
I would like to know if transformer winding is the problem OR if the problem is known and someone can help me troubleshoot.
I have attached the circuit diagram (taken from source **broken link removed**) but some filtering components were removed.
I am having problems in driving a center tapped transformer via a push pull converter. No matter what turn ratio I use, (with switching frequency = 58kHz) the output voltages are always too high. And the input current is extremely high (at very low output loads the current >= 9A).
I suspect that the issue is related to transformer (toroidal core transformer with turns ration 60:30, 20:10, 40:20 are tried but to no success). My reason for suspecting transformer is that if I use a simple 50Hz transformer, I get a smooth output voltage (similar to the pwm - based inverters just that I dont get a sin wav output) and am able to drive little bulbs.
I would like to know if transformer winding is the problem OR if the problem is known and someone can help me troubleshoot.
I have attached the circuit diagram (taken from source **broken link removed**) but some filtering components were removed.