Sine wave power inverter

[babalola]

thanks mincing for your response, my technology is a direct conversion from 24v to 220vac via a step-up transformer.
i will post the schematics/code later since i have gotten a responce from someone.

[babalola]

hi friends,

attached is my schematic/code .please i need help to achieve:

1: total hamonic distortion THD<3%
2:OUTPUT REGULATION OF 220VAC<+/-3%

if any one is willing to help on pibasic compiler platform, then such person can convert the code to picbasic compiler and give me the source plus hex file for onward download to the pc18f452.

regards,
babalola

[iw2fvo]

Hi to all in the forum,

I will like to build up a sine wave inverter using a PIC microcontroller.
The schematic attached by Babalolo is not readable for me : can it be posted in a different format and with better resolution ?
I see a very long set of messages in the forum, Is some one capable of illustrating me briefly the status of the various projects ?
Is there a valid working project at the moment ?
Thanks a lot for the assistance.
Ambro
Iw2fvo

[babalola]

hi guys,
iam reposting the schematic onpdf format

babalola.

[iw2fvo]

Hi,

I saw the schematics diagram for the inverter.
Is there any operational description of the system?
Is this a fully working inverter ?

Thanks
Ambro
IW2FVO

hi guys,
iam reposting the schematic onpdf format

babalola.

[babalola]

hi,
i have only posted the aspect of my schematics i think is related to the problem i have need to solve and that is, code to regulate the output of the inverter. i have the functional complete schematic.if the need arise i will post the full schematic.however for operational explanation,a single PWM signal is geenerated via the CCPR1L(RC1) of the 18f452,this signal is separed to PWM1 and PWM2 through the operational amplifier LM393 before passing to the steering logic of 74hc257 from where we get the four driving signals through the two unit (A/B) of the 74257.the additional signal on RC2(SWITCHING SIGNAL) is to change the input A/B of 74257.
i hope i make some meanings.can someone give a help to the regulation proble please?
babalola

[mincing]

YOu have done quite a bit of job.And how are you reading the adc i.e. the output feedback.
I mean what is the shape on pin4 /an2.Is it half recified sine?

Earlier there was a suggestion in the same forum to have anther array of error corrction and add a term to
CCPR1L = sine_wave[index];
like CCPR1L = sine_wave[index]+sinewave_corr[err];

with no load check at each oint what is the reading on adc and then with load check the same .the differen ce will give an idea of how to frame error array.
then keep updating the error array based on feedback.

also it is not clear what is the update time(timer0 interrupt).
may be you can contact me at [email protected],since i happen to check forum rarely.

[iw2fvo]

Thanks ,

Will you please post the part list, and the software for the PIC ?
What are the performance of this equipment ?
Any brief explanation of its operation ?

Thanks in advance for having posted complete data for fully repllicable project.
Regards,
Ambrogio
IW2FVO

hi guys,
iam reposting the schematic onpdf format

babalola.

[Pppppp]

In this circuit... There is no way to connect DC cooling fan. Because, heat sink and transformer getting hot at the time of inverterting and battery charging. So, please discuss about the cooling fan terminal connection with pic16f72 microcontroller. Please start a thread in the appropriate forum for detailed technical help. This is just a chat box, your post will disappear quickly.