300 Watts PWM Controlled, Pure Sine Wave Inverter Circuit

In this article we learn regarding a 300 watt power inverter circuit which uses a PWM concept for acquiring an output waveform that's equivalent to a sine wave. The concept exploits the versatile features of the IC 555 where a couple of them are used for generating the intended results.

Make this IC 556 Pure Sine Wave Inverter circuit

This 556 IC based sine wave inverter is quite identical to the previous design and employs a single 556 IC instead of two 555 ICs for getting the desired pure sine wave output.

Modified Sine Wave Inverter Circuit Using IC 3525

Modified Sine Wave Inverter Circuit Using IC 3525

We all know pretty well about this chip the IC 3524/3524 which is basically a PWM generator IC, which is fundamentally used for making PWM controlled inverer circuits

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1 kva full bridge modified sine wave inverter circuit

hi m janvi

ReplyDeleteHow To Make a Cell Phone Jammer?

I will try to cover this topic soon in my blog.

Deletesir how to increase the load regulation in modified sinewave inverter (ic 4017 is used ) ..? actually i am getting 0.90a , 250v output but when i put a 100w load voltage will be reduced seviourly but load works fine , but the problem is i cant connect another 60w load simeltaneously??

ReplyDeleteplease show me the circuit diagram which you have employed...i'll try to figure it out.

Deletei have maild you the driver section of my inverter sir.. because rest of the circuits are same as your design using ic 555 and 1c 4017 (modified sine)..

Deletesir , what is the maximum current dat can be taken by irf 540 mosfet at vds = 24v ?? according to its datasheet it is 5 amps , is it true??

ReplyDeleteUpto 30 amps...you can refer to the datasheet here:

Deletehttp://homemadecircuitsandschematics.blogspot.in/2013/01/irf540n-mosfet-specifications-datasheet.html

ok thank you..

Deletehi Mr. Swagatam im new here i want to know how to bile a 3000 watt inverter simple because i don't know enough about electronic but im very exciting about it & i want to know how to build a 3000 watt transformer (enough small but powerful) please help me.

ReplyDeleteHi Rashel,

Deleteyou should begin with smaller designs then upgrade them into higher wattage types, I have discussed many inverter designs in this blog, you can select any one from them and start your learning course.

Hi Swagatam

ReplyDeleteHere is a schematic of a simple sine-wave oscillator, which oscillates between 0-10v at 50Hz. I was just wondering if we can use a step-up transformer to get 220v?

Sorry, I forgot to attach the schematic. Here it is:

ReplyDeletehttps://dl.dropboxusercontent.com/u/20969135/Sine-wave%20oscillator.gif

Hi Abu-Hafss,

DeleteThe circuit will not handle higher amps and will require an output stage for amplifying amps to the transformer. Moreover this circuit won't generate both the AC half cycles, which makes it ineffective as an inverter.

sir my task was ups as final year project.. but i have made an inverter yet with h bridge of irf3205 its output is a rectangular wave with +12,-12 V 24peaktopeak ... now plz guide me what should i do next for making it modified sine wave and stepping up and filtering :(( plz i need urgent help

ReplyDeleteShow me the circuit diagram, only then I would be able to say anything.

Deleteupload it to any image sharing site and give me the link.

Ok i m messaging u on ur fb profile ... plzzz plzzz help me ssooon

DeleteHi Swagatam,I want to know that, in my home there is a pure sine wave inverter with a battery.I know how to convert 12 v DC to 230 v AC but I don't know the reverse or charging process that means 230 v AC to charge the 12 v battery.can you tell me the same MOSFET H-bridge used for charging or separate charger used when battery is drained at rated charging point.can you send me the details about it.

ReplyDeleteemail- biswajitdas49@gmail.com

Hi Biswajit, you can charger the battery with a separate battery charger circuit through an external voltage source such as from your home AC mains or a solar panel.

DeleteI have published many cool battery charger circuits in this blog, you can select any one from this list:

http://homemadecircuitsandschematics.blogspot.in/p/battery-chargers.html

HI Swagatam,THANKS for your reply.I know your every circuit is awesome in this field.

DeleteI want to know, is there any "possibilities or the process" to use the same mosfet which is used in H-bridge to make dc to ac can be used for battery charging(ac to dc) process in the same circuit board using microcontroller?

Hi Biswajit,

DeleteI am not good with microcontrollers so cannot suggest you anything useful on this.

Hello sir,can you help me with building of LCD display for a mini fuel dispenser?

ReplyDeleteHello Segun, Please provide an elaborate description of your requirement.

Deletesir , max Ids of a mosfet decreases as the Vds increases ?? as per some graphs in mosfet datasheet .. ? also practically mosfet burnt as current increased a value shown in datasheet .. ? (irf 540 , max ids = around 5A at vds=24v ) ?

ReplyDeleteHi Vishwas, that's impossible, there might be something incorrect in your circuit. You can test the mosfet separately using a, say 20 amp 50V lamp or any other value below the specified rating, the mosfet will not burn..

Deleteoh ok.. so we can use 8 amp 500v mosfet in a 340v h bridge ciruit with a load of 2 amp safely??

ReplyDeleteyes that's correct.

Deleteok thank u.. sir i have mailed u some graphs fom mosfet datasheet can you analyse it and tell me what they mean ?

ReplyDeleteThe left graph shows the safe operating area of the mosfet. The y-axis shows the max current that should not exceed over the dotted line on the top. The x-axis shows the max voltage that should not exceed beyond the thick dotted line at the right side of the graph, while the Vds voltage which lies on the right hand side of the thick dotted line can be applied only as a short pulse whose duration is indicated along the vertical thick dotted line.

DeleteThe right hand side graph simply shows the current/voltage response of the mosfet across its drain/source when Vgs or gate voltage = 10V

ok.. now now i have some quetions , irf 840 mosfet is rated as 8amps , 500v , but when we observe the graph,,, at vds=500v , max allowable DC current is about 0.3 amps(FROM THE GRAPH) , so can i say that 8 amps can be passed in pulse but not continuesly , continuos current of only 0.3 amps can be passed??

ReplyDeletethank you for your time,

No, may be you are reading the graph wrongly, it doesn't show anything like that,

Deletethe thick vertical line at the right shows the voltage limit after which it could applied only as pulsed voltage as given beside the line.

The left slope indicates the current response with respect to voltage, whereas the upper white space indicates the danger zone or the restricted area for the current.

...8 amps can be passed continuously albeit with heasink on the moset

Deletecan we use am radio ferrite core for high frequency inverter purpose? arround 250 W?

ReplyDeleteit won't produce efficient results, because the core should be a looped type as in E-cores or in torroidal cores for getting efficient outputs....

Deleteok..

ReplyDeleteHi Mr. Swagatam,

ReplyDeletei have a defective 2kva ups, i want to salvage the transformer (48v no center tap 110v ouput), please make me a design using this transformer, and i have also mosfet ifr3205, incorporate this if possible...

thank a lot.

Ariel.

Hi Mr. Ariel,

DeleteYou can try the following design:

http://homemadecircuitsandschematics.blogspot.in/2014/01/simplest-full-bridge-inverter-circuit.html

Hi Mr. Swagatam,

DeleteThank you and i appreciate your design, but IC IRS2453(1)D can't found in electronic shop.

Can you please make an alternative circuit using NE555 and 4017, or 4060 for oscillator driver..

option 1 using 4 n-channel mosfet, option 2 using 2 n-channel and 2 p-channel mosfet..

Thank you for your immediate response.

Thanks a lot

Ariel

Hi Mr. Ariel,

DeleteThe circuit that I have referred is a professionally designed circuit and will start working without any hassles, other modified designs may not be so reliable,

if you insist, the following circuit may be tried, which has been designed by me

http://homemadecircuitsandschematics.blogspot.in/2013/04/h-bridge-inverter-circuit-using-4-n.html

Hi Mr. Swagatam,

DeleteThank you for your immediate response. By the way, What type of regulator to be used to supply the VCC of IC 4049 and 4017? my Battery Voltage is 48v in series, or maybe I use one of the series battery so that i can feed 12v to IC and 48v is feed to mosfet and the ground are common. My existing mosfet is IRF3205, is suitable for this circuit?.. What is the oscillating frequency so that i can produce 60hz from the output Transformer?

Thanks a lot Mr. Swagatam,

Regards

Ariel

Hi Mr. Ariel,

DeleteYou can use a 7812 IC for powering the ICs

48V will work for the mosfets separately.

IRf3205 is OK.

oscillating frequency could be 600Hz at pin14 of 4017

Hi Mr. Swagatam,

DeleteThe circuit is work fine on 12v dc supply. But when i connect on 48 volts dc supply, the pnp transistors (bc557) blows out. Please help me to trace what happen.. is this exceed the Vec of BC557 because the bootstrapping network?

Thanks a lot Mr. Swagatam,

Regards

Ariel

Hi Ariel,

Deletethe 4049 IC will surely need 12V supply and not 48V....so you must apply the 4049 IC also with 12V from 7812 IC.

48V will only go to the high side mosfet drains and must be suitably dropped before applyuing to the ICs.

and yes 7812 cannot be used with 48V since these ICs can handle not more than 35V input.

You can use a BC546 as an emitter follower with 12V zeer at base for getting the required 12V supply.

Hi Mr. Swagatam,

DeleteI just want to clarify that the diode (1n4148) across the positive terminal to the output of bootstrapping network. The anode terminal is connected directly to the battery even if the supply is 48 volts?

And also the capacitor is connected directly to the ground terminal.

Thanks a lot Mr. Swagatam

Regards

Ariel

Hi Ariel,

DeleteI have updated the discussed diagram appropriately, you may refer the same for getting a clearer view.

hi,

ReplyDeleteI hope you watched the channel- lasersaber.

Well, I wanted to know a bit of trade language in electronics(how we ask a components name in shop).

I went to a shop and asked a transformer "120v-12v, 40va transformer(stepdown)". The shop keeper asked what does va means??

I told him "Volt-ampere", then he said, he dont know.

So can you say what exactly i should ask for the above mentioned transformer in trade language.??????

Hi,

DeleteIf the CFL is rated at 12 watts it WILL consume 12 watts for the specified illumination, if anybody claims to produce the same illumination at a lower supply power the person may be completely faking....there are many such fake claims presented on Youtube so please don't trust them.

Tell the shopkeeper that you want a 120V, 12V/3 amp transformer he would now surely understand

Helped me a lot,

Deletethanks,

with regards.

Hi Mr. Swagatam,

ReplyDeletei hav 3055 tr old inverter. it can fractuate output in Changeover time..how to solve this problem...??

Hi Sovan, I am sorry I did not understand your requirement, please explain it more clearly.

DeleteHi sir,

ReplyDeleteI build an inverter using ic 3524, the inverter is working fine on some appliance but won't power a small standing fan and a small clipper. Pls what can I do?

Thanks in advance

Hi Kolley, the fan wattage could be beyond the capacity of the inverter power that's why it's not able to move it...you may have to increase the battery AH and/or the transformer amps for upgrading the inverter range

Delete