I c....but the reason that i use RC filter is because i used the connected load as R. Rload = R filter.
Assume that i am using LC filter, what will be the low pass cut off frequency that i should set?
is it 50Hz?
If so, i set the C = 1000pF then, the L value will be very large,right?
Thanks audioguru :)
Now i have increase the PWM frequency to 19kHz. But my inverter design at the output there is a bit different.
I use ADC to convert a single phase sinewave with peak amplitude of 5V to PWM signals.
Then, the PWM is used to switch or chop the 220Vdc.
The output that i...
Hi there everyone :)
I have constructed the H-bridge circuits which is control by PWM, the frequency of PWM is about 4900Hz.
Therefore, a single phase PWM sinewave at 220Vrms is generated.
Then, my questions are how can i filter this 220Vrms PWM sinewave into a perfect sinewave?
Should I...
Hi there, does anyone know how to convert the different width pulses(vertical) of a PWM signal to different height pulses(horizontal) accordingly....any comparator I C can do this ???
Thanks. ;D
I c :o...thanks....but is there any low cost but effective ways to convert a 12VDC to 220VDC?
Hi,kachew....at the moment i still on thinking...so,i still not certain with this design yet... :-*
;DHi,audioguru:
what i found is the ferroresonant transformer provides squarewave output but just require less filtering......
if i use PWM method to convert a low VDC to high VDC through a ferro transformer.
Then using H-bridge (which is switch by PWM) to chop the high VDC to obtain 240VAC...
Hi,audioguru :)
i'm interested in constructing a pure sinewave inverter. Do u know any books that talk about how to design this kind of inverter?
the ferro-resonant transformer that u mean is it same as the ferromagnetic transformer ???