Pic 16f876a Pure Sinewave inverter

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maharadga

Joined: 05 May 2008
Posts: 13
Location: Bulgaria

07 Mar 2009 12:47 sine wave pwm module

Hi, voravat.
You not start inverter without feedbacks. All is necessary.

voravat

Joined: 11 Jan 2009
Posts: 10

12 Mar 2009 12:43 pwm sine wave for tv

Hi,All.

update my works

My inverter now start with green-->red--> and then green bink .
during green blink,output has some signals at same period of blinking.

(no any load connected ,or no check of polarity e.g. curr_h a/b etc..

now,I just have only 12VDC power supply and ordinary multimeter.)

Tomorrow,I'll ckeck for whole feedbacks.

thanks again.

Taner

Joined: 17 May 2006
Posts: 96
Helped: 5
Location: Bulgaria, Plovdiv city

12 Mar 2009 21:12 altium summer pic16f876

Hi voravat,
The inverter will not start normally if all feedbacks are not connected to the PIC MCU.
Inverter LED status (Dual Color, Green&Red) are these:
1. Green -> Normal operation
2. Green Blinking -> Standby Mode (No load operation)
3. Red -> Low baterry (<10.8V)
4. Red Blinking -> Over Temperature of Power Transistors
5. Orange (Green+Red) Blinking-> Before going in Stanby Mode (for 5 sec).

Best regards.

voravat

Joined: 11 Jan 2009
Posts: 10

14 Mar 2009 15:45 pic16f84a programmer

Hi, Taner and maharadga.

I'm so confuse about these results:

1st--> when I removed transformer ,the signals shows normal.
(standby mode-->g/r blink then green blink , overtemp-->red blink)

http://s561.photobucket.com/albums/ss58/qewrty/?action=view¤t=CIMG4269.flv

2nd--> after I connected transformer and then connected load, LEDs show very strange ,and every green flashing there was " Tik" sound form transformer(this point i think transformer try to operate.)

http://s561.photobucket.com/albums/ss58/qewrty/?action=view¤t=CIMG4270.flv

ps. 1 all feedbacks were connected.
2 I wind a new unit with pri/sec :4/203 on EE65 ferrite core operating at20kHz
3 I also tested with 12/220 50Hz lowpower transfo, results are same as ferrite core
could you guys help me !! Crying or Very sad

thankyou

or...last choices . if you guys okey ..i would like to ask for your pcb layout

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Last edited by voravat on 16 Mar 2009 13:59; edited 12 times in total

partha.acharjee

Joined: 15 Mar 2009
Posts: 1

15 Mar 2009 20:09 pic inverters

taner,pls upload the simulation file.

codewiz

Joined: 14 Sep 2008
Posts: 75

16 Mar 2009 12:07 ps21765

Hi Taner. i'm still following d thread. though i ve not gone into real construction. good work Taner. keep it up. My regards to Maharadga & Voravat for keeping d thread going. --- bless u all.

maharadga

Joined: 05 May 2008
Posts: 13
Location: Bulgaria

16 Mar 2009 16:33 pic16f628 pwm leds

Hi, voravat.
When was "tik" sound from transformer, inverter in stahdby mode . It`s normal . Every second one wave sinusoid check for load. If load is very small /less than 2W/, try adjust standby level /R22/.

voravat

Joined: 11 Jan 2009
Posts: 10

16 Mar 2009 20:27 pic pwm sinewave

Hi,maharadga.

good to see you again!

yes, are there from u10? but.... when The transfo was attached, LEDs status
act irregularly such as g flash r flash g flash...go on ,or g flash r flash then nothing else, Very Happy

every green flash sitll comes with tik sound.

Once, i connected load R around 16-17W / no responsive, LEDs still abnormal.

Plese give me in detail for adjusting Inverter for first time , I think I follow Taner's
steps , but maybe I do something wrong , I don't know. Neutral

Thank you very much Very Happy

Last edited by voravat on 17 Mar 2009 14:26; edited 2 times in total

Taner

Joined: 17 May 2006
Posts: 96
Helped: 5
Location: Bulgaria, Plovdiv city

16 Mar 2009 22:31 pic pwm sinus

Hi Friends,
I finally found the datasheet of the original Inverter.
Look at this pdf, there have a description of all functions and LED statuses.
I was implement the same functionality in my inverter.
Best regards: Taner

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afifzakaria

Joined: 17 Mar 2009
Posts: 1

17 Mar 2009 6:45 what are pwm inverters?

hai and salam to all,

i am new and do not know how to start this PWM PIC inverter. can someone help me to build it from nothing? Please..

voravat

Joined: 11 Jan 2009
Posts: 10

17 Mar 2009 7:09 pwm lut

hi,all.

Today, I rebruned PIC MCU ,and remove feedback by remove R12 R21 D9 R16 (just voltage and current feedback signals as you said in previous reply for first starting on inverter)

Results are: orange flashing(more frequently than 1s) and comes with signals at output.

I've been reading in dominoIII 's manual and try to understand what you explain
all above .If i do somthing wrong,bring me to the right way please. Idea

maybe....i'm wrong in adjusting .if had more time..,would you tell me how to adjust again..

Very Happy

thank you ... Very Happy

maharadga

Joined: 05 May 2008
Posts: 13
Location: Bulgaria

17 Mar 2009 15:13 pwm circuits for inverters

Hi all.
I see that in blockdiagram in DominoIII PWM filter is before trafo. Interestihgly...
Hi ,voravat.
If you remove D9, maybe PIC is damage. Be careful...

voravat

Joined: 11 Jan 2009
Posts: 10

20 Mar 2009 12:01 sine wave inverter pic pwm code in ccs

Hi,

Update, my inverter now generated spwm , a/b signals and produced load check signals (around 300Hz, in range of mV magintude,right?) ,after that i put load around 12W then adjust R22 for detec this load. I adjusted R22 until LEDs status --->green flash red flash then green emits ,but no generating of 230Vac at output ---->so I can't adjust polarity of Votage and Current feedback .

(for this stage i removed R12 R21 R16)

also, i tried to put a 60w light bulb ,but Q3 and R42 burned out before i tested it Crying or Very sad

i'm a nubie in this field ,please give me advices

maharadga

Joined: 05 May 2008
Posts: 13
Location: Bulgaria

20 Mar 2009 15:00 sine pwm in pic

Hi,voravat. Better sheme adjust with oscilloscope. But try this: Whenn polarity is o`k, sound from transformer must be silent, it`s just as if he connected to 220V set. If sound from transformer is strong and sharp, like from square signall you must change polarity of transformer. This will lose your time, but chance to hit is big.

zahidj

Joined: 29 Jan 2009
Posts: 2

02 Apr 2009 18:17 programming guide for pwm inverter

the circuit is very complicated
is it possible to make it simple if we dont use current sensing(overload)and some
others.
can any body make the circuit simple i.s is only sine wane output

toygeek

Joined: 06 Apr 2009
Posts: 1

06 Apr 2009 2:35 pic 18f program sine wave inverter

could you please explain about output over voltage and over current protection curcuits?,what are the curcuits called?

jojora

Joined: 16 Feb 2006
Posts: 6
Location: Santo Domingo, Dominican Republic

13 Apr 2009 1:42 study of pwm sine wave inverter

Hi Taner,
great job, I want to change the operating frequency of 50Hz to 60Hz and the voltage 120volt, what should I do?

jojora

veiledcavalier

Joined: 26 Feb 2006
Posts: 97
Helped: 2
Location: Alexandria-EGYPT

13 Apr 2009 8:34 inverter schematic pwm

Hi Taner,
Nice work and good PCB.
i would ask about something which i couldn't find in the posts; which algorithm do u use in PWM generation? Is it space vector modulation?

About the PCB, was it green like in photos b4 u make it, or u used something to pint it??
thanks

jojora

Joined: 16 Feb 2006
Posts: 6
Location: Santo Domingo, Dominican Republic

14 Apr 2009 5:01 basic application tlp250 igbt + -15v

Hello, Taner,
I wanna know the use of D6 and D7, and why?

Question

jojora

dilipvpn

Joined: 03 Apr 2009
Posts: 2

14 Apr 2009 14:18 low frequency pwm inverters

Hi everybody,
will you please give the pcb layout for 'Protel 2.7'

Dilip

Taner

Joined: 17 May 2006
Posts: 96
Helped: 5
Location: Bulgaria, Plovdiv city

14 Apr 2009 21:32 програмиране на pic 16f84

Hi jojora,
D6 and D7 are bootstrap diodes, they must be a fast schottky diodes.
D6 with C17 or D7 with C18 forms a bootstrap power supply circuits for the upper optodriver IC's U3 and U4. C17 and C18 must be HF tantalum capacitors.
Best regards.

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14 Apr 2009 21:32 Ads

jojora

Joined: 16 Feb 2006
Posts: 6
Location: Santo Domingo, Dominican Republic

14 Apr 2009 23:30 pic pwm sinus inverter

Hi dilipvpn, this is the project exported to Pr*tel 2.8

att

jojora

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dibagay

Joined: 24 Oct 2007
Posts: 22

15 Apr 2009 7:36 pic sine inverter

Hi all,
I need this circuit in Eagle if anyone can help me because i haven't pr**l programm

jojora

Joined: 16 Feb 2006
Posts: 6
Location: Santo Domingo, Dominican Republic

15 Apr 2009 15:55 altium designer torrent download

Hi, Taner

thanks for the explanation

att
jojora

Very Happy

dilipvpn

Joined: 03 Apr 2009
Posts: 2

16 Apr 2009 8:00 low frequency pwm +pic

Thanks jojora

dilip.

jojora

Joined: 16 Feb 2006
Posts: 6
Location: Santo Domingo, Dominican Republic

18 Apr 2009 4:59 pic in inverter

Hi Taner
What i can do to put the inverter in ups mode?

Taner

Joined: 17 May 2006
Posts: 96
Helped: 5
Location: Bulgaria, Plovdiv city

18 Apr 2009 21:07 new concept invertor india

Hi jojora,
This requires additional circuits as:
1. Zero-cross detection for grid synchronization.
2. Relay(s) for switching the load to grid or to UPS output.
3. Battery charger - embedded in UPS or separated.

Best regards: Taner

jojora

Joined: 16 Feb 2006
Posts: 6
Location: Santo Domingo, Dominican Republic

22 Apr 2009 0:22 pwm inverter pdf

Hello, Taner

I want to change the frequency from 50 to 60 Hz and the output voltage of 220V to 110V.
what I should change in the C program, because now I am learning to program in C in autodidact mode, but I'm using mikroc.

thanks for everything
carefully
jojora

howidam

Joined: 23 Apr 2009
Posts: 16

23 Apr 2009 11:57 pwm inverter pdf file

hi
I'm want to design an inverter which converts 360DC into 220 vC with frequency 50 HZ with PWM and harmonic filter would you please help me coz I'm traped here all aloneeeeeeeeee

buildmet

Joined: 09 Sep 2008
Posts: 1

24 Apr 2009 13:08 pic16 sin wave inverter

Hi Taner,

I went through the C source and found that two arrays -
signed long int level_corr[32];
signed int shape_corr[32];
have no values.

Your two other arrays have values but the code is commented out. I suspect you are doing wave shaping and level correction, but I dont think this source code will work if we compile it.

I am working on a half bridge high frequency sine inverter and was looking at ways to do waveform correction. Your implementation looks good and its a neat idea.

Let me know if you can provide more inputs on how the code works without values in the array.
ramesh[/quote]