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You are here: Home / Inverter Circuits / 3 phase Solar Submersible Pump Inverter Circuit

3 phase Solar Submersible Pump Inverter Circuit

Last Updated on August 3, 2020 by Swagatam 48 Comments

The post explains a simple  3 phase solar submersible pump inverter circuit which can be made by configuring a few ICs and a few power devices. The idea was requested by Mr. Lufono and Mr. Sami.

Circuit Objectives and Requirements

  1. First of all i must say thanks to you and  Mr. Lufono, I have many solar projects of solar tube well and want to make a three phase inverter and I connected 14 to 23 solar panels of 250 watts every solar panel 31 volts 8amp in series than I have 450 vdc to 750 vdc.
  2. My submersible pumps 5.5kw to 7.5 kw 3phase 220v and 380v 3phase.
  3. I also request that in the circuit auto motor speed control also needed, means when solar panel voltages up or down with the time and sunlight motor speed also adjust automatically.
  4. If igbt needed GP50R12KT3 or other no problem plz help me so so thanks .

The Design

I have already explained a simple single chip 3 phase full bridge inverter circuit, the same IC can be used for the proposed solar pump inverter circuit. The standard configuration of the 3 phase driver IC IRS2330 can be seen below:

Circuit Diagram

However since the mentioned 3 phase driver requires a dedicated 3 phase signal across its triggering inputs marked as HIN....LIN, it would be first important to learn about a simple 3 phase signal generator circuit using opamps which could be integrated with the above design for the intended outcome..

It doesn't need to be a sine wave 3 phase signals a simple square wave 120 degree phase shift PWM generator could be used for the application, as illustrated below:

3-Phase Generator Schematic

simple square wave 120 degree phase shift PWM generator

The above 3 phase generator circuit can be further modified in the following manner so that it can be fed to the 3 phase driver IC shown in the first image:

opamps are buffered using transistor inverters

Using BJT Buffer Stage

Here we see how the outputs from the 3 phase generator opamps are buffered using transistor inverters for producing the required 3 out-of-phase channels for the HIN...LIN inputs of the IRS2330 3 phase inverter driver IC.

The load connected with the driver mosfets or IGBTs now would receive a square wave 3 phase operating voltage, which could be a submersible pump motor in our application as per the request.

In case the IC IRS2330 looks difficult to acquire in the local market, the following cheaper half wave solar submersible inverter circuit concept could be implemented, although with 50% less wattage efficiency.

The BJTs could be replaced with appropriately rated mosfets or IGBTs...rest of the configuration is pretty straightforward and does not need much explanation.

SHARING IS CARING!



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About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

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  1. Search Related Posts for Commenting

  2. Lins Roberto Pereira, says

    COMO VAI? NESTE PRIMEIRO ESQUEMA, QUAL MOSFET POSSO USAR, PARA UM MOTOR DE 1000 W ? OBRIGADO .

    Reply
    • Swagatam says

      In the first diagram, IGBTs are shown but you can use MOSFETs also, the rating will depend on your specific application specification

      Reply
      • Lins Roberto Pereira, says

        OKAY? I THINK I CAN ASSEMBLE THIS SCHEME, FOR A MODIFIED ALTERNATOR ENGINE. BUT I PREFER MOSFET FOR BEING CHEAPER. I WOULD LIKE YOU TO HELP ME CHOOSE MOSFETS, FOR 1000 W. PLEASE THANK YOU.

        Reply
        • Swagatam says

          Please provide voltage and current specifications also for the alternator….

          Reply
          • Lins Roberto Pereira, says

            HI, HOW ARE YOU? I BELIEVE IT IS BETTER, CONSIDER THE ALTERNATOR, MODIFIED, WITH 800 WATTS, VOLTAGE 24VOLTS, CURRENT 35 AP. IT WILL BE MOUNTED ON A LOAD BIKE, THANK YOU.

            Reply
            • Swagatam says

              Hi, you can try any 100V 50 Amp MOSFETs, such as this:

              https://www.mouser.in/datasheet/2/427/sqd50n10-8m9l-1764727.pdf

  3. THILAGAR says

    Dear sir,
    we need a pcb for solar pump controller ,
    you have solutions.

    Thanks & regards

    9786077355

    Reply
    • Swagatam says

      Sorry Thilagar, I don’t make PCBs

      Reply
  4. akshay says

    sir vb1 vb2 vb3 kanha connect karana hai igbt se jo output nikal raha hai thank you sir

    Reply
    • Swagatam says

      on the respective cathodes of BA159

      Reply
  5. Victor Braun says

    Hi Swag
    Back to the 3 phase generator system for a deep well pump. I am starting to get some gear together and am now doing a little more research.
    Looking at the link you supplied (https://www.homemade-circuits.com/arduino-3-phase-inverter-circuit-with-code/) I am guessing that the output are square waves. Generally not a problem with most devices. However, I have read that induction motors may not respond well to square wave inputs. The deep well pumps around here are all induction as far as I know.
    Am I wasting my time by continuing? I am hoping not with your advice. If it looks to be a problem then I need to expand my reach outside the box.
    Thanks
    Vic Braun

    Reply
    • Swagatam says

      Hi Vic, I think you should try the above square wave design and see how it responds. Actually succeeding with the above design can be crucial, later on this design can be converted into a sinewave quite easily through an external circuit, if it becomes necessary.

      Reply
  6. Victor Braun says

    Hi Mr Swagatam
    Looked for your first name but didn’t find it. So we will have to be formal for the time being.
    Great site.
    I was a professional electrical engineer back in the dark ages before becoming a school teacher and lost touch with electronic design etc etc. So my knowledge is dated at best.
    My question is:
    In Australia, our voltages are 240V single and 415V 3 phase. What modifications would I need to make to your circuit to run a 5kW deep well pump. I am reasonably competent with building circuits etc.
    I am wanting to start to become independent of the grid and this seems to be a good solution. I have plenty of solar panels.
    Thanks
    Vic Braun

    Reply
    • Swagatam says

      Hi Victor, Swagatam is my fist name, you can call me “Swag”. I am Glad you liked my site! I would recommend you to build the following linked design. Due to presence of Arduino, the 3 phase generator section becomes a lot easier and accurate. You can build a smaller version first using lower rated mosfets, if everything goes well, you can replace the devices with higher rated mosfets or IGBTs as per the 5kva specs.

      https://www.homemade-circuits.com/arduino-3-phase-inverter-circuit-with-code/

      Let me know if you have further doubts!

      Reply
  7. Sudip Bepary says

    Sir, please send me a circuit diagram about closed loop stepper motor driver . Nema 17 stepper motor i am using for my 3d printer. I want to add optical encoder to motor.so, please try to give me a circuit on hybrid stepper driver

    Reply
    • Swagatam says

      Sorry Sudip, I do not have this circuit at this moment!!

      Reply
  8. Giel says

    Hi Swagatam,

    I am staying in South Africa with nice sunshine conditions
    I want to run my single phase swimming pool pump 0.75 kW directly from a solar panel – in the morning as soon as the solar panel preduce the correct voltage and amps the pump motor must start and in the evening when the sunshine fade the pump must stop. Have you got a circuit alraedy for this? Or can you tweak a circuit and design that will work?

    Reply
    • Swag says

      Hi Giel,

      I think you can simply try the last circuit based on IC 555 from the following article.

      https://www.homemade-circuits.com/how-to-make-light-activated-day-night/

      Connect the relay contacts with the motor, as soon as the sunlight is sufficient enough as per the selection of R1, the relay switches ON and operate the pump, and switches OFF as soon as the sunlight drops below the given threshold.

      Reply
      • Giel says

        Thank you very much

        Reply
  9. ABHISHEK Gupta says

    Sir please provide circuits With pin diagram of three phase signal generator

    Reply
    • Swag says

      you can try the following one instead, which is a tested design.

      https://homemade-circuits.com/3-phase-signal-generator-using/

      please note that the 3 phase inverter circuit is a hugely complicated circuit and absolutely not recommended for newcomers, build it at your own risk if you are not an expert in this field…

      Reply
  10. ABHISHEK Gupta says

    Can I use LM 324 in replace of LF411

    Reply
    • Swag says

      yes you can try LM324…somebody told me that the opamp circuit does not work, but I don’t believe it because the circuit was referred from one of the top technical websites and looks correct to me..

      Reply
      • ABHISHEK Gupta says

        Thanku so much sir
        I will go to try this

        Reply
  11. ABHISHEK Gupta says

    Thanks for reply sir
    Can I use single phase transformers in replace of three phase transformers

    Reply
    • Swag says

      how will you connect a single phase transformer in this design??

      Reply
      • ABHISHEK Gupta says

        Out put of mosfet connected to the input of transformers as single phase transformers

        How increase voltage from 12v to 240v
        B

        Reply
        • Swag says

          please show me with a schematic how the single phase transformer would connected with the above circuit and also how the trafo’s output could be connected with a 3 phase load.

          Reply
  12. ABHISHEK Gupta says

    Sir I want to make three phase inverter
    12v DC to 240v AC supply please sir guide me

    Reply
    • Swag says

      Abhishek, I already have this circuit in this website, you can search it using the search box on top….

      Reply
  13. Athri H D says

    If we replace bjts by mosfets don't we need MOSFET driver?

    Reply
    • Swagatam says

      yes that's right, you can try inverting the configuration, use P channel for the upper mosfets and N channel for the lower… and add 3V zener diodes to their gates for allowing a dead time.

      Reply
  14. B and F Solar tech says

    I rebuild the circuit on every-circuit but cant seem to get it working where does the negative for solar panel feed on the have wave circuit

    Reply
    • Swagatam says

      interpreting a simulators output can be difficult for me.

      all the connections which are marked with "ground" symbols must be joined with the negative of the supply.

      additionally the opamp supply pins will also need to be connected with a 12V voltage supply.

      I hope you have connected all these appropriately.

      Reply
  15. B and F Solar tech says

    Good day
    I have a 24v solar pump that uses a 24v controller to run the brush less motor of the pump i would like to know how to build that controller the pump has 3 wires running it

    Reply
    • Swagatam says

      You can use the concept which has been explained in the above article….

      Reply
  16. vhafuwi says

    Hello Swagatam,is there any replacement for LF411 on the alternative circuit

    Reply
    • Swagatam says

      Hello Lufono, you can use any other opamp having features like high slew rate, low power consumption and high speed performance….although these are not crucial for the suggested design but will help to achieve better overall response….you can try IC741 also and see if works or not….I believe it would also work.

      make sure to use a 3V zener diode with the base resistor of the respective transistors to prevent small offset voltage causing false triggering of the BJT

      Reply
  17. positivethinker 7512 says

    Thanks sir i have no wards to say thanks and i say u my best teacher at e help.so so so thanks .May u live long with peace.

    Reply
    • Swagatam says

      Thanks positive thinker, the pleasure is all mine!!

      Reply
  18. vhafuwi says

    Hello Swagatam, it is going to take a while to receive the IRS2330 I have ordered from Aliexpress . in the meantime I want to use your suggested cheaper half wave solar submersible inverter circuit concept , since LF411 available Locally.My question is how do i connect LF11 to the circuit , and is it one LF11 or three, and for a 0.55KW Load , what will be the suitable IGBT or Mosfet. Will appreciate your assistance

    Reply
    • Swagatam says

      Hello Lufono, you will need four LF411 ICs, and connect each one as shown in the article.

      the mosfets could be IRf450 since the voltage is at the mains level.

      Reply
  19. vhafuwi says

    Thanks for the quick respond , I am testing the above circuit on a breadboard , once all is well i will fabricate it on a pcb and post details , thanks again for a straight forward circuit for my solution

    Reply
    • Swagatam says

      you are welcome lufono, please make sure you build and it stage-wise

      Reply
  20. raghavendra kalyani says

    sir I want contact with you by phone can you call me sir my number 919740790078 or give me your number sir please

    Reply
    • Swagatam says

      sorry, a telephonic conversation may not be possible.

      Reply
  21. raghavendra kalyani says

    hello Sir I want 240vdc to 240vac single phase 2kw invertor and it's circuit diagram please suggest me sir

    Reply
    • Swagatam says

      hello ragahvendra, you can either the above concept or the following one

      https://homemade-circuits.com/2016/04/solar-inverter-circuit-for-15-ton-ac.html

      Reply



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