350 W Pure Sine Wave Inverter with CC CV Charging, Automatic Changeover [Rev. 2] + Giveaway

[@Thiasotiks]

Dear friends, I have uploaded the code with LCD interfacing in the github. Link: github.com/ElectroHijibiji/Pure-Sine-Wave-Inverter-16x2-LCD

[@osazeimhontu3239]

thanks for replying me I really appreciate your effort,in this tutorial you optimize the switching pattern of the MOSFET could it be the reason for the high current draw?.

[@Engineer2explorer]

Fan not turn on sir after new codes ..in first video ..codes fan works with temprature but not in v2 ..even also not in v3

[@osaretininnocentifaluyi7485]

What a project, without hiding anything, but the code, schematic and the the video explanation, infact I love your videos

[@Thiasotiks]

Thanks for your comment.

[@adesuyisunday4287]

Nice improvement. A long awaited project. Thanks for sharing.

[@Thiasotiks]

Thanks 😊

[@adesuyisunday4287]

I sent you a message on your Gmail. Check it

[@josephotieno898]

Cool stuff and outstanding job... Thanks for sharing and I appreciate the time you put in to assemble this great piece...

[@Thiasotiks]

Thanks for your comment.

[@moshiurrahmanmeraj6640]

ভাই এক সময় এই ধরনের দেশি DSP pure sine wave inverter সার্কিট এর খুব ভালো একটা প্রয়োজন ছিল , তো তখন আমরা ইন্ডিয়ান dsp inverter সার্কিট ব্যবহার করতাম , তখন যদি এই সার্কিট থাকত তবে খুব ভালো হতো । যাহোক আপনার ভিডিওটি দেখে আমার খুব ভালো লাগলো এবং আপনার কঠোর পরিশ্রম করে সফল হওয়ার জন্য অনেক অনেক ধন্যবাদ । আর আমার মনে হয় সব সময় advance technology নিয়ে কাজ করে এগিয়ে থাকা উচিত । 👍👍👍

[@Royal_Highlights_TV]

I don't know a lot about electronics but I do know about this guy. He is a pure gem 💎. Keep on going Dadabhai ❤

[@Thiasotiks]

Thanks for your overwhelming appreciation. ❤️

[@jorgevillamilarellano6789]

Hello friend, could you help me? I want only the spwm wave to come out like this, but without what are the charge sensors, battery sensor, current sensor, fuse sensor, I understand only the output for the driver controller. I appreciate for 60HZ.

[@truongnguyen2897]

Hello, may I ask? In the diagram, pin D3 in the arduino is specifically the +VE_CY pin. If I don't use this pin, will it affect the operation of the circuit? And the next question I want to ask is how to measure the charging current of the battery, when the shunt resistor has been used to measure the overload. I do not use the CHNG-OVG-RLY pin, but only the CHG-RLY pin (relay switching between inverter and grid). Is that possible, sir?

[@TheTechBoy-TTB]

Bro Thanks for the great project you have made. Specially a great gift for those who are learning and doing DIY.

[@veerakumarbit2207]

can you explain how the H Bridge is used to charge the batteries and can you explain switching patten for the two low side MOSFETS

[@DNAP460]

Excuse me sir I want to modify it with a 4 wire fan, can I modify the program for example the fan speed depends on the temperature reading of the lm35 with the pwm output which controls the fan and there are remaining atmega pins there are D0 or TX can I add a fan rotation failure feature by reading the tachometer pin on the fan 4 cables, whether the atmega memory is not remaining or the sine pwm generation function will be disrupted

[@mayoortechinnovations]

Nice work bro.. I enjoyed the video. Looking forward to version 3 which will be 2kva capacity at 24v ... Well done

[@adesuyisunday4287]

Hi, please what's the job of CHG_RNG on pin5(D5) of the Arduino nano sinewave inverter?

[@Thiasotiks]

CHG_RNG can be used to switch between two different charging currents. It can be helpful if you often change the battery. However, it's not activated in code.

[@adesuyisunday4287]

@@Thiasotiks ok thanks

[@paulpixzy5297]

@@Thiasotiks CH Relay is t compulsory??

[@jorgevillamilarellano6789]

I would ask which of these high mosfet control drivers is better for 48v input fan7392 ir2110 tlp352 I tried with the ir2110 but they get damaged a lot, with the others I have not worked.

[@tizzapizzaflash9317]

hello can we add fan rotation failure detection on the remaining TX pins

[@ndidikenneth5135]

I am working on a 36v 2.5kW inverter . pls can u explain the charging implementation . I don't quite get it , the soft start with varying charging current .

[@truongnguyen2897]

ADC reading equivalent to maximum chg current during full charge = ((ic * a) / ADC res); For example. ic = 0.5 A, actual voltage amplification. a = 0.22, ADC resolution = 4.887 mV, please explain where these numbers come from.

[@jboy4real]

My question is how do you calculate the required current that will flow to the secondary of the transformer from the battery through the mosfet

[@Thiasotiks]

The basic formula is Current = power / bat. voltage but, you need to estimate the current due to the losses in the transformer as well as in the MOSFETs.

[@jboy4real]

@@Thiasotiks please kindly explain in detail

[@jboy4real]

@@Thiasotiks rather what do you mean by estimating the current kindly explain in detail

[@osazeimhontu3239]

Nice work,thanks for sharing ,I have a few questions to ask,your previous inverters draw about 1.1amps from the battery,why does this one draw almost 3 amps on no load ?,and you only use 2 lookup table for the feedback don't you think having more will make output voltage more steady?

[@Thiasotiks]

I don't know the exact reason for that higher current but, I'm working to reduce it back. For voltage stability no need for more number of lookup tables because, it always calculates the table if lower or higher voltage is encountered.

[@shatikarmakar7272]

Sir you can use 2.2uf 630v cap for reduce the no load current.

[@adesuyisunday4287]

Hi, thanks for the previous help. Can this inverter be upgraded to 1.5kva by increasing number of mosfets and transformer size?

[@Thiasotiks]

Since the basic principal is same for the higher load capacity also, I hope it will work.

[@sreejithts4541]

Hai how to charge the invertor from another charging source,is it possible to drive d11 and d12 pin out connect to mosfets to drive external charging source, cv cc charging method working or not in that arrangement? I try to make a 1000 watt invertor with ferrite core transformer, for charging using 20a smps power supplay

[@Thiasotiks]

CC-CV charging topology is already implemented. You can adjust the current and voltage in software.

[@SandipDas-ct3dl]

Need ur help... Have 600va ups... Suddenly the ups not charging the battery but main sense and backup mode is totally ok... Checked and found that mcu not giving charging pwm...is there anyway to charge this battery with using another small mcu like attiny 13...??? Like in the inverter circuit u have made the charging worked like the original ups or inverter one...plz give me some suggestions...i don't wanna use any other transformer for charging... Thank you...

[@Thiasotiks]

I won't recommend you to drive the mosfets externally because, the charging current and battery voltage is to be sensed presisely and it is to be in sync with the backup and mains mode also.

[@jboy4real]

Why do you separate the low side channel

[@sijojohnson]

Appreciated for your great effort. Battery charging current is fixed or or variable? what is the max and min charging current that we can set ?

[@Thiasotiks]

Charging current can be changed from Arduino code, it's not fixed. The maximum charging current depends on the circuit components such as MOSFETs, transformer etc. In my experience increasing the duty cycle more than 40% shows a high risk of burning the low side MOSFETs.

[@sijojohnson]

@@Thiasotiks thanks. how the charging section works? both high side mosfet are continuously OFF or ON at the the time of charging? low side MOSFET are switching at 100Khz. any phase difference required for low side mosfet or both lowside mosfet are On Off at same time? i need 4 amps or below for charging 40ah tubular battery.

[@rahulkoley6161]

#Thiasotiks. Can u tell me...what happens...if I am not connected the OK2 optocoupler with main line..bcoz...already OK1 optocoupler is present for main sensing...?? ......................&.............................. Previously....U already told me...that OK2 optocoupler is connected with half wave rectifier from Main line...so....is it (positive leg of internal Led of OK2 optocoupler ) ac / dc voltage ....if measureing it....with digital multimeter......with reference to Ground....??

[@Thiasotiks]

If you don't connect OK2 then inverter will always start with the negative half cycle no matter what was the phase of the mains voltage right before the mains failure. It's not a big problem though. It will cause another problem in switching from inverter mode to mains mode. To solve that delete "if (PIN_ZC && !zcPrev)" portion in the line #160.

[@abdulrasheedmattummal]

Great brother, effort never fails, current little high, go ahead

[@Thiasotiks]

Thank you very much brother.

[@JabastinS]

15:03 I think 500 Watts consumes when applying load on drilling machine.

[@Thiasotiks]

Yes, you are right. During free run it consumes around 230-250 W power.

[@METHEE.C]

Hi For you share the codes LO1 ,HO1 and LO2 , HO2 has no dead time affects the mosfet, explodes or overheats.

[@Thiasotiks]

There are dead times in both channels of the H-bridge. Probably you've missed something.

[@Techcommunity360]

Nice but you need to work on the output voltage for it not to be dropping at any load

[@more376]

Very interesting and this is very good design

[@rahulkoley6161]

#Thiasotiks... If I connected the transformer low voltage tapping (at secondary) with the middle position of TX terminal on PCB.......Only at this time....The small relay is triggering to NO(normally open) CONTACT....during charging time(mains mode).......... Otherwise...If transformer has no low voltage tapping (only 0-220v tapping present )....Then... the Small Relay is not triggering.... It's always stays on NC (normally close)CONTACT......During both charging time (Mains mode) & backup mode... Am I right...?? Thanks...🙂🙂

[@Thiasotiks]

Yes. Correct.

[@sandeeps7979]

Sir u should use input side inductive filter before powering up Mofet ,and use low pass filter at output which consists of capacitor ,and to control 3amps at no load check pcb because resistance and inductance in the pcb track is problem I think sir .

[@POWERCAREUPS]

Hello Sir, Thanks for sharing the projects I need one clarification why used charger relay with 140v taping, if possible to switch the 230v directly ....please

[@Thiasotiks]

The 140 V tapping can be used if mains voltage is too low to charge properly although this hasn't been used in this project. It is kept as a provision for future upgradability.

[@POWERCAREUPS]

@@Thiasotiks Thank you 🙏 Sir If you can made with feedback option to control the constant output voltage at any load condition just for suggestion please🙏

[@sijojohnson]

what is the exact part number of the MOSFET driver chip? in the schematic is mentioned FAN9732 is it correct, no datasheet is available for that part number. is it FAN7392 or FAN9732 ?

[@Thiasotiks]

It was my mistake in the circuit diagram. It will be FAN7392.

[@ramkumarnanu1171]

12V 100AH ​​Lifepo4 prismatic cells are connected to a sine wave inverter with an AC charger, do these cells need additional BMS?

[@Thiasotiks]

Whether the particular battery you're using requires a BMS or not that you can know properly from the manufacturer's datasheet. It's difficult for me to say.

[@ramkumarnanu1171]

In a sine wave inverter, how does its charging function with the batteries? particularly which components doing?

[@Thiasotiks]

The mosfets in h bridge and their body diodes are doing the charging also.

[@ramkumarnanu1171]

If I use a toroidal transformer, do I need to install an inductor or choke as well? How to calculate the value of the inductor for each capacity like 750VA & 1250VA sine wave inverter?

[@Thiasotiks]

Since every transformer has some leakage inductance due to the non-ideal couing, it's not mandatory to add chock coil. But adding some inductance may help to reduce the open load current. It's difficult to calculate the exact value of inductance, because the transformer winding also provides some inductance.

[@ramkumarnanu1171]

@@Thiasotiks Thank you.

[@eliasbarbosadacruz6096]

@@Thiasotiks induktor 47mh

[@paulpixzy5297]

Thanks...for the video but what is the problem of the lcd and the schematic is not clear to me what app to view it

[@Thiasotiks]

LCD was delaying the switch-over from mains mode to inverter mode. If you are ok with this delay you can use LCD. I will upload the code with LCD also.

[@paulpixzy5297]

@@Thiasotiks yes need the lcd for it to be complete so delay doesn't matter

[@paulpixzy5297]

Super you for this beautiful application

[@rahulkoley6161]

Can u tell me... 1)small relay is working in which mode..(mains or backup mode)??.... &.... 2)big T- type relay is working on which mode.. (Mains or backup mode)??.....&..... When the inverter is overloaded / low battery....Can it automatically cut the output load...??

[@Thiasotiks]

The small relay would be necessary if you use a lower voltage tapping in transformer secondery side during charging to increase the charging current. The T-type relay is working to switch between mains mode and inverter mode. (Relay engaged: inverter mode) Yes, it will go to cutoff automatically in low battery or over voltage scenario.

[@SandipDas-ct3dl]

#Thiasotiks... Can u plz tell me...that... Can I use an external battery charger (14v 1amp) with computer ups....when the ups is on mains mode....?? Because..my ups...not charging the battery...as microcontroller not producing the charging pwm...but...on backup mode... It's totally ok... And...on mains mode...it detects the mains but not charging..the battery.....??

[@Thiasotiks]

I think, you can charge the battery externally. There shouldn't be any problem as long as the charger outputs are compatible with the charging parameters of your battery.

[@techs5564]

Brother! what is Thiasotiks?

[@seazilialiabond5740]

which things helps to calulate the watt of inverter?i mean if i want to extend the watt of inverter which componets need to urgrading,and the calution?plzz help me bro

[@Thiasotiks]

It primarily depends on the rating of the transformer and the MOSFETs. If you wish to increase the load capacity look for a bigger transformer and add more transistors in parallel. But while adding more transistors don't go beyond the limitation of the gate driver IC. Please go through the manufacturer data sheet of the driver IC.

[@seazilialiabond5740]

@@Thiasotiks how to calculate that a deiver ic has how many capabity to givingg pulse to the gate of mosfets/trabsistors?plzz bro help me....

[@grittinjames]

Hi, Could you please share eagle schematics and PCB file?

[@bakulpatel2862]

can you make single phase to 3 phase vfd....and all 3 phase angles can be controlled 0 to 360

[@Thiasotiks]

Due to the core saturation problem VFD with such a setup will be difficult to realize however, VFD can be made using Arduino but that's a topic of another project.

[@SandipDas-ct3dl]

#Thiasotiks... I want to make this PCB on a Vero board...With the help of schematic diagram..Can u tell me one thing... In this version...You are using A0 pin as voltage feedback ....and....A6 and A7 pin for Load sensing and I-CHG-Sensing respectively... Will these pins(A6,A7) are directly related to A0 pin for output feedback voltage correction​.... According to the variation of load...??

[@Thiasotiks]

The load sense is to detect overload condition only. And charge current is read during charging to correct charging current. You can change those pins making necessary changes in code.

[@SandipDas-ct3dl]

@@Thiasotiks Thanks for ur reply..

[@rahulkoley6161]

#Thiasotiks In the schematic diagram...the positive terminal of the internal LED of OK2 optocoupler is directly connected with a high watt 220 ohm resistor(R28) & 100k resistor(R22) from the Mains 220v ac.... I mean...there is no dc voltage...for this internal led of OK2 optocoupler.. Can it harm this OK2 optocoupler...??

[@Thiasotiks]

Yeah, OK2 is not connected to dc but, it's connected to a half wave rectified voltage. This is done to detect the positive half of the mains voltage and it will not harm the opto coupler.

[@rahulkoley6161]

@@Thiasotiks Thank you..

[@bashiralao9172]

Nice job sir. I have one concern, I think there should be a way to improve the output voltage stability such that the difference in no- load and on-load will not exceed +-5v

[@Thiasotiks]

I'm trying to improve the output voltage stability.

[@tuleivlad3355]

Can you post the schematic for I2C to led? I have downloaded schematic and software for led displaying status. Very interesting project. Thank you for sharing.

[@Thiasotiks]

Thanks for commenting. The interfacing between i2c and leds is very simple. Just follow this: I2C bit-7 --- mains on I2C bit-6 --- inverter on I2C bit-5 --- charge on I2C bit-4 --- battery low I2C bit-3 --- over load I2C bit-2 --- fuse blown

[@tuleivlad3355]

@@Thiasotiks Thank you for answering to me and all of us. I'm building a 2kw version with your code and feedback loops. Best regards, Vlad.

[@mehedisakhawatleon1929]

Bro how can activate Low volt Cut(mains volt below 150) and High volt cut(while mains volt 270) Plz help me

[@Thiasotiks]

In the Arduino code you can add a conditional statement to trigger the changeover if the input voltage goes beyond a specified limit.

[@adesuyisunday4287]

Can P817 replace SFH618A-2; also can IR2110 replace FAN9732 in the inverter circuit?

[@Thiasotiks]

Yes, you can replace. I've used IR2110, no problem occurred.

[@apoorvdeepak7333]

Can I used p817 ocptocupler in place of SFH618A-2 because they are not available in my market..

[@bakulpatel2862]

thank for sharing the video , is it possible to very phase angle through Arduino

[@Thiasotiks]

Yes, it's possible by changing the data pointer to the look up table at the beginning. But incorporating phase change in the real-time would be too complex for this project.

[@easirarafat6771]

Nice project sir..... thanks for sharing ❤

[@bongobarta1908]

3things is need to be better... efficiency, output voltage and changeover time.. idle current consuming more, and a 15w bulb glowing bt invrtr consuming 3.8 almost 4amp which is high.. so efficiency ko leke kaam krna pdega.. changeover ke time bhi bulb off horha hain.

[@Thiasotiks]

I'm working on these issues.

[@rahulkoley6161]

Very nice...Can I use this PCB with ups transformer (220v to 7v trafo 600va 360watt)...??

[@Thiasotiks]

Yes. It will work.

[@rahulkoley6161]

@@Thiasotiks can u Plz tell me... What does it mean..on the schematic.. 1)+VF CY (Arduino pin no.6) 2)CHG RNG (Arduino pin no.8) 3)Mode (Arduino pin no.22)

[@Thiasotiks]

+VE_CY : Connected to the phase sensing optocoupler. It will be low at positive cycle of the mains voltage. CHG_RNG : To select between two different charging current. (Not implemented yet. Use if you frequently change the battery with different capacities) MODE : To select different kind of batteries e.g. SMF battery and Floating type battery. (Not implemented. Kept for future upgradability)

[@juliusparker3039]

You said there is error is it corrected in the Gerber file

[@Thiasotiks]

Yes.

[@smartups1]

why your inverter sine wave is not clean sine wave

[@Thiasotiks]

Pure sine wave inverters don't actually deliver the "pure sine wave" but it also contains a lot of harmonics from high frequency switching pulses. Those harmonics distort the shape of output waveform specially at no load condition but, they are almost filtered out when load is attached and the waveform get back it's sweet sinusoidal shape.

[@MrGeraldino250]

hi you have code for 60hz 120vac?

[@Thiasotiks]

Sorry, I don't have it.

[@Engineer2explorer]

Fan not work even at high temprature after new codes

[@Thiasotiks]

I have uploaded a new code (V.3.2) in the github repo github.com/thiasotiks/Pure-Sine-Wave-Inverter . Please download that code.

[@Engineer2explorer]

@@Thiasotiks thanks for new codes i will try with new one..but in new code you changed ckt diagram also but not upload new ckt diagram One more thing sir. .your 1st attempt spwm was best as there were 2 sq wave of 50 hz and 2nd high frequency Use a ferrite core before transformer with 1 mH inductance with spwm side output or say H1 side ..then no heating in transformer also mosfet better perform .

[@bubaibhattacharyya4337]

Dear Your project is fine and well explained.But the no load current should be 0.8amp to 1.3amp.

[@Thiasotiks]

I am constantly working to reduce the no load current and increase the efficiency. However, I've made the project fully open source and anyone is invited to do modifications towards the improvement of the project.

[@bubaibhattacharyya4337]

@@Thiasotiks Thanks for replying me.i am also working on the same.

[@manoftheday1]

I appreciate your efforts well done, but the idle current is too too high work on that and you will have a great project in your hand.

[@Thiasotiks]

Thanks for your suggestion. I am already working to find out the reason behind the lower efficiency and trying to sort it out.

[@yuribiktop6595]

Mostly if the transformer winding is not split bubblin it draws more current try using split bubblin Transformer and see the difference

[@asitsantra3491]

khub sundor hoeache dada...

[@SandipDas-ct3dl]

#Thiasotiks.. Can you please tell me...Your transformer specifications...I mean..Primary and secondary voltage rating...??

[@Thiasotiks]

Primary 9 V, secondary 230 V.

[@SandipDas-ct3dl]

@@Thiasotiks Thanks...

[@arahmankabir8405]

pls upload parts list

[@Thiasotiks]

The BOM (bill of materials i.e. parts list) file is already uploaded along with the gerber files.

[@ObaidullahKakar]

Great Dear you have done it

[@adesuyisunday4287]

Pls add the LCD function

[@Thiasotiks]

I'll upload the code with LCD instead of LED

[@adesuyisunday4287]

@@Thiasotiks ok

[@adesuyisunday4287]

Hi, I saw the code in GitHub but I am unable to download it. Kindly send to me via Gmail.

[@sukhdeosingh617]

Beautiful project.

[@ishwarphysiks4804]

Very nice... well done

[@Thiasotiks]

Thank you. 😊

[@JabastinS]

Good work man.

[@shuvendupattari8079]

Incredibile 👌👌👌👌

[@scienceandtech7164]

Great work

[@digitelworld7]

Wonderful 👍

[@arahmankabir8405]

Who are you? How to upload this project to Arduino Uno. Please update the project code.

[@Thiasotiks]

All the codes I've already shared. Link is given in the video description.

[@leeleshb.k8424]

Thanks a lot sir.

[@ambikasaransarkar5378]

Outstanding!

[@juliusparker3039]

But my observation,11amp @100w bulb is too high

[@Thiasotiks]

Yes according to linear calculation it is high but, you must consider a few things like transformer loss (due to very hight switching frequency), losses on the thin wirings and higher internal resistance of small battery etc.

[@juliusparker3039]

@@Thiasotiks ok thanks,I am waiting for my free PCB. [e-mail]

[@pradeeshkuttiyath5091]

Good project 👍👍👍

[@Thiasotiks]

Thanks

[@antonyjohn4061]

Good work

[@sagorrana2051]

helpful project

[@Engineer2explorer]

Good project..can you plz provide 1pcb to me

[@bongobarta1908]

changeover time is high...

[@srenjis]

Good project

[@sumitgoswami6638]

super bro

[@pukhrambamsushmadevi5965]

👍👍👍

[@Dc_tech386]

Your circuit is getting the mosfet warm at 100 watt not good that should not happen my circuit don’t even get warm at 300 watt the mosfet are cold so the dead time between phase that’s your issue for heating up so fast

[@Thiasotiks]

It's an initial prototype only, there is a long way to go in the journey to the perfection.

[@scienceandtech7164]

Hello great man

[@gautamupadhyay2040]

Plz details in Hindi

[@arahmankabir8405]

Thank you very much for uploading a beautiful video after a long time. Can you please give me a pcb gift if you don't mind.

[@veerakumarbit2207]

Hi Friend,

[@abdulhai2201]

Your project fine update project solar hybrid inverter

[@deepakgupta8606]

Hindi

[@Thiasotiks]

Deepak, I am an Bengali so apart from english I can make videos in Bangla only.

[@Engineer2explorer]

helllo Sir ,May i know how to communicate with you ,any mail id or whats app no ?

[@giovannijaimes333]

Hi you have code .ino for 60hz?

[@Thiasotiks]

No, I don't have code for 60 Hz.

[@sumitgoswami6638]

i already made it but special purposes 24v dc to 220v ac 600w ......thanks...bro great job keep it..... send your email address i send you som picture of my design....pcb

[@Thiasotiks]

That's awesome Sumit! [e-mail] is my E-mail id.

[@paulpixzy5297]

@@Thiasotiks please,where the pin v_rs on the lm358 connected to??

[@seanramdeholl3469]

Cool