Sine wave power inverter

[Pawanbahl]

Dear Sougata
I have been looking up your posts. I am presently working on a similar product for which i am only searching right now. its a small 110Va inverter that converts 110v Dc+/-25% to 110v AC sine wave. Thermal mnagement and low harmonics are key requirements for me to. i was wondering if you could share with me your learnings from you 2005 inerter poject! Any guidance will be helpful. I am presently struggling with the boost circuitry- WHY DO I NEED TO USE a seperate IC? as well as the output section1 9Very much basically - the entire desgn).
Can you guide?
regards
pawan.

[babalola]

I realy need help for inverter output regulation, i have C- code for open loop control that is working but i realise this thread is confine solely for pibasic compiler, and because the demo version is just for 50 line code. i found out that with this line of code ,no meaningful inverter code can be written.i believe this is one of the reason why issue of software is not common on this thread .is anyone ready to help from this forum?. If there is commitment from someone ,then i will post the schematics and the code.

babalola

[mincing]

I did some work on 18f pics with h/w pwm and closed loop control.I build pid in hardware but thas little slower.

I built a quasi sqare wave inverter with out put regulation using 16fs.

Hope I can throw some light.

Is your a natural freqency or HF.

regards,

[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.

[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.