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    600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi,
    I am new in this forum. I am looking for a 12 v DC to 220~230 v AC 600/800w SMPS Inverter for Home appliance use like ips. I am looking all around the web for this kind of device but not getting clear answer. Please anybody help me providing full diagram and PCB layout.

    Thank in Advance
    Reza

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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Dear Reza
    Hi
    it is pretty simple . but i don't think that you find a complete circuit and all things ! if you want design , it i can help you .
    Best Wishes
    Goldsmith
    When you sensed that i can help you , feel free to ask me .
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    3 members found this post helpful.

    •   Alt6th June 2012, 23:15

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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Quote Originally Posted by goldsmith View Post
    Dear Reza
    Hi
    it is pretty simple . but i don't think that you find a complete circuit and all things ! if you want design , it i can help you .
    Best Wishes
    Goldsmith
    Dear Goldsmith,

    If you do that it will be helpful to me. It will be more better if you can even give me the diagram of a 600w SMPS Inverter Circuit.

    tnx
    reza



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    I can help you to design !
    At first , we will have , an H bridge to increase the 12 volts of your battery , ( with HF transformer ) and then another H bridge with SPWM and without transformer ( it will has a simple filter at the out put ) . and then a feed back through out put , to the first stage .
    Best Wishes
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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi Goldsmith,

    Tnx again. I think i'll get all support from you.
    As much as i know the first H bridge circuit increase the input dc 12/24 Volt to 380vDC with Hi frequency. And the second H bridge with SPWM without transformer, change the Hi frequency 380vdc to 220vac 50Hz output. Am i right ?? If no pls provide me (If u Can) stage by stage information of design.

    Please Provide me a common H bridge Design to increase DC voltage according to Requirement. Which circuit can be change as per our Requirements.
    Also second H bridge stage and the final stage.

    Can we make commercial SMPS for home appliance use ??



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi again
    Why 380 volts ? 311 volts . and why changing high frequency 311 volts to the 50 HZ ? i have to describe it again :
    1- we will change the amplitude of a low value DC voltage to the high value such as 311 volts ( of course square wave ) and then we will rectify and filter it . and then ( it has an HF transformer with pretty low size ) we will use this increased DC voltage as supply of another stage ( it is H bridge too ) . but this stage will get SPWM ! not PWM ( first stage has PWM ) . and this stage won't have any transformer . it just will have a low pass filter . ( LC ) . you understand ?
    BTW : do you know meaning behind PWM and SPWM and difference between them ? and what about boot strap drivers ?
    Best Wishes
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    The only thing that i couldn't understand yet , is why humans should fight together ? why not helping each other to have a better world ?



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi its me again,
    Sorry for my bad English........
    i know PWM & SPWM. and i have some idea about boot strap. So now tell me how should i start.........

    Best Wishes
    Reza
    Last edited by rezacadet; 21st June 2012 at 18:37. Reason: mistake
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    •   Alt21st June 2012, 18:00

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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hello rezacadet,i can give you diagram of modified sine wave using H-bridge if you are intrested.


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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi Reza
    At first you can use an SG3526N and two mosfet driver ( e.g IR2113 ) you should design an H bridge with it , to achieve high voltage ( 311 volts DC ) . i think 120KHZ would be good as PWM frequency . at first read the datasheet of SG3526N . and tell me can you design first stage ?
    By the way , are you familiar with inductor and ferrite transformer design ? if no the way is pretty simple . i can give you just 4 page ( tutorial ) . that you can design all kind of your magnetic elements with it !
    Best Wishes
    Goldsmith
    When you sensed that i can help you , feel free to ask me .
    ************************
    Experience is a good professor of mine !
    ************************
    The only thing that i couldn't understand yet , is why humans should fight together ? why not helping each other to have a better world ?



    •   Alt21st June 2012, 19:30

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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Quote Originally Posted by kabiru View Post
    Hello rezacadet, i can give you diagram of modified sine wave using H-bridge if you are intrested.
    Sorry Dude,
    Tnx for your offer. At present i am learning about SMPS inverter from gold smith. After learning the concept i will work for practical. Then i maybe need your circuit.

    BR
    Reza

    - - - Updated - - -

    Quote Originally Posted by goldsmith View Post
    Hi Reza
    At first you can use an SG3526N and two mosfet driver ( e.g IR2113 ) you should design an H bridge with it , to achieve high voltage ( 311 volts DC ) . i think 120KHZ would be good as PWM frequency . at first read the datasheet of SG3526N . and tell me can you design first stage ?
    By the way , are you familiar with inductor and ferrite transformer design ? if no the way is pretty simple . i can give you just 4 page ( tutorial ) . that you can design all kind of your magnetic elements with it !
    Best Wishes
    Goldsmith
    Hi Fnd,
    Please never mind, i was detached from electronic ckt for last 7 years, so it will take some time to understand. i want to know something, why it's 311v & why 120KHZ ? is there any specific reasons? please give me your tutorial file for help.

    some time i will ask you like stupid, please never mind.

    Best Wishes
    Reza
    Last edited by rezacadet; 22nd June 2012 at 18:15. Reason: mistake
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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Quote Originally Posted by rezacadet View Post
    Sorry Dude,
    Tnx for your offer. At present i am learning about SMPS inverter from gold smith. After learning the concept i will work for practical. Then i maybe need your circuit.

    BR
    Reza

    - - - Updated - - -



    Hi Fnd,
    Please never mind, i was detached from electronic ckt for last 7 years, so it will take some time to understand. i want to know something, why it's 311v & why 120KHZ ? is there any specific reasons? please give me your tutorial file for help.

    some time i will ask you like stupid, please never mind.

    Best Wishes
    Reza
    is good to learn...keep learning.


    1 members found this post helpful.

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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi Reza !
    I came back again !
    You asked me why 311 volts ? well is the phase voltage 220 volts in your country ? if yes , don't forget that this value is effective . ve*sqrt(2) =311 volts . did you know it ? and about 120KHZ , of course it has a reason . if you increase your frequency , the size and price of your magnetic elements will decrease . but we have some red boundaries in design . i think if you design your first stage as a current mode system , the result will be pretty good . but for current mode we have a limitation to select frequency of operation . it can't exceed from these values . ( if you exceed from this frequency the result will become to be bad ) .
    By the way , are you familiar with SMPS design process ?
    Best Wishes
    Goldsmith
    When you sensed that i can help you , feel free to ask me .
    ************************
    Experience is a good professor of mine !
    ************************
    The only thing that i couldn't understand yet , is why humans should fight together ? why not helping each other to have a better world ?



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi Goldsmith,
    Its me again. I understand what you have said in previous post. my country's phase voltage is 220v. I have some small idea about SMPS but not clear concept.
    Can you please give me some doc step by step, that i can achieve a clear concept about SMPS design process.

    Br
    REZA
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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    @Goldsmith: If the requirement is to design a ferrite transformer needed for dc-dc push pull bridge converter having the spec (Vp=12v, Vs=320v, VA=500, f=60kHz), how can we chose the required ferrite core. Could you please show us the step by step process of it?



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi again . can you give me your email address , please ? thus i can send you some good references about SMPS design .
    Best Luck
    Goldsmith


    Hi Sam
    See below , please , i have told , how to select core and how to design magnetic element for an SMPS . ( some days ago i have attached some tables about core selection ) :
    https://www.edaboard.com/thread229615.html
    Good luck
    Goldsmith
    When you sensed that i can help you , feel free to ask me .
    ************************
    Experience is a good professor of mine !
    ************************
    The only thing that i couldn't understand yet , is why humans should fight together ? why not helping each other to have a better world ?



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Dear Friend

    Please kindly contact with me if you have any question about magnetic component in design, I hope I can help you, I am engineer who designs magnetic parts( transformer and inductor and choke and filter).

    Best Regards
    Cicely



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Quote Originally Posted by goldsmith View Post
    Hi again . can you give me your email address , please ? thus i can send you some good references about SMPS design .
    Best Luck
    Goldsmith

    Hi Sam
    See below , please , i have told , how to select core and how to design magnetic element for an SMPS . ( some days ago i have attached some tables about core selection ) :
    https://www.edaboard.com/thread229615.html
    Good luck
    Goldsmith
    Salam Goldsmith
    instead of taking a picture of your SMPS design pages why dont you scan it
    and then post it , then maybe we will be able to see it clearly then
    regards



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Quote Originally Posted by goldsmith View Post
    Hi Sam
    See below , please , i have told , how to select core and how to design magnetic element for an SMPS . ( some days ago i have attached some tables about core selection ) :
    https://www.edaboard.com/thread229615.html
    Good luck
    Goldsmith
    I didn't find the way to chose required core for a desired power handling capability at certain frequency. The process shown there mainly related to calculation of number turns if there is already a core at hand.

    Should we not chose the core first then turns calculation?

    - - - Updated - - -

    @cicelywu: Could you please help us learning to design high efficiency transformer? We believe, we'll learn more about practical things from your experience.
    Last edited by sam781; 26th June 2012 at 21:04.



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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Hi sam . did you see latest page of that thread ? i have attached 8 page of a book . don't forget most important thing in learning is reading carefully .
    https://www.edaboard.com/thread229615-4.html
    Good luck
    Goldsmith
    Salam Goldsmith
    instead of taking a picture of your SMPS design pages why dont you scan it
    and then post it , then maybe we will be able to see it clearly then
    regards
    Dear Tipu
    Hi
    Thank you for this remark , but unfortunately my scanner has been destroyed ! i should buy a new one . but i will do that .
    Thanks
    Goldsmith
    When you sensed that i can help you , feel free to ask me .
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    The only thing that i couldn't understand yet , is why humans should fight together ? why not helping each other to have a better world ?



    •   Alt26th June 2012, 21:07

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    Re: 600/800W 220~230v AC Inverter SMPS from 12v DC

    Quote Originally Posted by rezacadet View Post
    Hi Goldsmith,
    Its me again. I understand what you have said in previous post. my country's phase voltage is 220v. I have some small idea about SMPS but not clear concept.
    Can you please give me some doc step by step, that i can achieve a clear concept about SMPS design process.

    Br
    REZA
    SMPS is a large field. There are various topics. There are various topologies to choose from. It would be sensible to start reading from a book. Marty Brown's "Power Supply Cookbook" is a good book to get your basics right. Then, you can read other books. You should also go through the application notes related to SMPS of various manufacturers.



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