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@kashmirihasan-apWWK0 • Jul 13, 2013
anyone here?
@jeffrey-xA7lUP • Jul 13, 2013
Hey man Sine wave got from inverters can't be 100% pure
But one solution I can think of is using a VCO tuned to the same frequency of the output of inverter and thus we get nearly smooth sine wave
PS:But why do you need 100% pure sine wave
@kashmirihasan-apWWK0 • Jul 13, 2013
so u are saying 100 % pure sine wave doesnt exist?
@kashmirihasan-apWWK0 • Jul 13, 2013
i need pure sine wave for my computer
@jeffrey-xA7lUP • Jul 14, 2013
kashmirihasani need pure sine wave for my computer
Your computer is designed to work in a wide range of voltage and fixed 50 Hz or 60 Hz frequency
This signal doesnot neccessarily be sine wave it can easily work if the input is a square wave as well
In general if your system has SMPS the input signal is immediately converted into DC for utilisation so the signal you are using has less importance
@cyborg-009-7H92N2 • Jul 14, 2013
MY BE project SOLAR MPPT SINE WAVE INVERTER ...
@cyborg-009-7H92N2 • Jul 14, 2013
No need for pure sine in smps devices which use rectifiers in first stage ..
all ur hard work of creating sine wave goes down the drain when it converted to dc ..
CFL's & computers work well at 230V Dc ..
@jeffrey-xA7lUP • Jul 15, 2013
Cyborg 009No need for pure sine in smps devices which use rectifiers in first stage ..
all ur hard work of creating sine wave goes down the drain when it converted to dc ..
CFL's & computers work well at 230V Dc ..
Not 230 V DC friend
That will be 230 V AC equivalent DC voltage Which is 230/(2)^1/2
@cyborg-009-7H92N2 • Jul 15, 2013
230V from mains is rms voltage ...Vpeak = 325V
230Vrms AC= 230V DC
@kashmirihasan-apWWK0 • Jul 15, 2013
my power supply got burnt bcz i used modified sine wave inverter. my friend told me to use pure sine wave ups.
@cyborg-009-7H92N2 • Jul 15, 2013
you made the inverter ???
in mod sine the o/p sits at zero for sometime to resemble sine wave ..
@kashmirihasan-apWWK0 • Jul 15, 2013
nope inverter was built by my friend. but he told me it was modified sine wave and sensitive devices like computer get burnt out becz of modified sine wave ...bcz in an inverter u can never have pure sine wave with a chopper
@cyborg-009-7H92N2 • Jul 17, 2013
some info on pwm inverter..
#-Link-Snipped-#
First step to produce 325V dc from 12v dc .It can be done using a push-pull dc dc converter.. O/P can be adjusted to 230VDC & can be diredtly used to power SMPS circuits ..
<a href="https://danyk.cz/dcdc_en.html" target="_blank" rel="nofollow noopener noreferrer">12V / 325V 150W DC/DC converter</a>
2nd step to provide sinusoidal PWM signals to H bridge powered by 325v DC ..
then the o/p of bridge is filtered to get 230V AC pure sine ..@ 1-5% THD
I used atmega16 & sine lookup table to produce the required pwm signals .
@arunvtkl-iQy8Zt • Feb 18, 2014
100% pure sine wave inverter using pic 16F628A chip
#-Link-Snipped-#
@manojcc-54iJH5 • Feb 28, 2014
after all you need to convert a sine wave ups into Dc at the end...why you wand to go around a bush when you have clear path to walk..
@jeffrey-xA7lUP • Mar 4, 2014
manojCCafter all you need to convert a sine wave ups into Dc at the end...why you wand to go around a bush when you have clear path to walk..
Well I don't agree with this term in all practical scenario. Some circuits need AC and so we need invertors to boost them up don't you think that they als need some justice done to them
Pure Sine wave circuits is not practically feasible Noises will be there nearly 99% pure is an apt word for describing the output of pic
@aalandkar-R9Nf1k • Mar 7, 2014
100% pure sine wave can be generated. Here are some steps to achieve it.
1. get sine(50Hz) weighted PWM with a carrier of 2-3KHz as per ur convenience
2. get them inverted.
3. now by using digital logic make 4 pulses of those 2 pulse.
4. get all the 4 pulses isolated and use them to fire IGBT/MOSFETs.
5. The resultant o/p will be sine wave. You can verify it by using R-C or L-C at the o/p stage.
@vamsi-kancharla-kL9oxU • May 4, 2014
kashmirihasanHow to make a pure sine wave ups ??? any circuit diagram? and what is the difference between a pure sine wave ups and modified sine wave?
pure sine wave(98%) inverters/ups are available in the markets to buy then why to design that to for computers time consuming task
