Hello,
I'm designing a sine wave inverter with hi-power full bridge section. What i need to do is to get the part to modulate the hi-freq. Let's say I set the oscillator up for 100khz now we have a ramp into the driver ,okay now on the error amp we set the plus input to +2.5 vdc. Now we should see the output sq. Waves for driving the mosfet are they can go to a driver first to off load current from the pwm device. Now this is what i need to do, I need to place lets say a 1uF cap one end to the +input of the error amp. And the other end will be to a low freq sine wave source. So now the sine wave will float at the +2.50vdc ref level, now i hope to see the output drive signals modulate to the low freq sine wave signal and the feedback signal to the - input will be the same ,with a +2.50vdc ref with a sine wave from the output sense section ridding on it to regulate the output. The ampltd. Of the output will be controlled are adjusted by varying the ampltd of the sine wave ref to the plus ➕ input of the error amp.
Let me no what the max and of the sine wave ref should be before it starts to begin clipping of the modulated signal, because from the full bridge wi be the output transformer and on the secoundry side will go to a low pass filter section to create the low freq sine wave out at the ref sine wave in, only now the sine wave will be at 115vac and i should be able to adjust the output from lets say 90vac to 125vac.
Let me no what what you think.
Thanks for your time,
WILLIE L MCCAIN
561 846 0150
