Inverters

Some of the best square wave and sine wave inverter designs have been presented on this page, specifically designed and researched by me.

But before that you may want to take a peek regarding what a sine wave inverter concept is all about from the following discussion, the later section walks you through the various sine wave inverter circuit links of your choice.

A power inverter system which generates a more than one step sinusoidal AC waveform is known as a sine wave inverter. To more understandably classify the inverters with outputs of significantly less distortion compared to the "modified sine wave" (3 stage) inverter models, the suppliers generally make use of the expression pure sine wave inverter. Practically all consumer range inverters that happen to be promoted as a "pure sine wave inverter" usually do not deliver a gentle sine wave output in any way, pretty much a a reduced amount of choppy output compared to the square wave (a single stage) as well as modified sine wave (three step) inverters. With this perception, the terms "Pure sine wave" or "sine wave inverter" are could lead to confusions to the user who may be interested in buying the system. That said, things may not be that crucial for typical electronics since these contend with the results reasonably nicely..

In areas where power inverter units become equivalents for traditional mains line supply, a sine wave output is most suited owing to the fact that most electronic units get fully optimized to be most useful with a sine wave Alternating current source of power. The customary electrical power supply endeavors to produce an electricity which may be a great approximation of a sine wave.

Sine wave inverters possessing more than than three blocks in the wave output may be considered a bit more advanced and include much higher price if compared to a modified sine wave, having just 3 blocks, or square wave, (single block), variants of the identical power processing. Switch-mode power supply (SMPS) gadgets, which include laptop or computer or DVD players, function on best performing modified sine wave power. AC motors expressly powered on non-sinusoidal electricity may perhaps deliver increased warming, can have distinctive speed-torque attributes, or could possibly churn out additional audible sounds as compared with when working on sinusoidal power.
Modified sine wave

A "modified sine wave" inverter carries a non-square waveform that could be an important close approximation of a sine wave for power translation objectives.

The waveform in commercially existing modified-sine-wave inverters is a square wave with a temporary stop before the polarity reversal, which simply cycles up and down by way of a three-position transfer that generates onward, off, together with inverse output at the pre-determined frequency. Flipping situations are established for positive, negative and zero voltages in accordance with the versions assigned in the switching Table 2. The maximum voltage to RMS voltage never upholds the matching association with regards to a sine wave. The DC bus voltage could also be consciously under control or the "on" and "off" occasions are generally customized to preserve the equivalent RMS significance output up to the DC bus voltage to recompense for DC bus voltage version.

The ratio of towards off period could very well be modified to differ the RMS voltage although keeping up a constant frequency with a strategy generally known as PWM. The produced gate pulses are passed on to each individual switch as outlined by the formulated structure therefore the output is attained. Harmonic spectrum in the output relies on the width of the pulses along with the modulation frequency. With induction motors, voltage harmonics are not of too much serious; but, harmonic distortion in the ampere waveform inflicts significant heat and tend to release pulsating torques.

A great number of electric systems need to work satisfactorily on modified sine wave power inverter systems, most notably all systems that may be resistive by specs for instance an old incandescent light bulb.

Many AC motors like work on MSW inverters with an performance depletion of around 20% because of the harmonic noise presence. But, these tend to be quite crude and noisy. A series connected LC network tuned to the basic frequency looks to be a good insertion..


The following articles provide some of the best sine wave and square wave inverter circuits that you mat select and customize as per your own power requirement specs. 

Showing posts with label Inverter Projects. Show all posts
 
 
Pages 1 of 16 12345678910NextLast

95 comments

comments
Anonymous
April 26, 2013 at 3:07 PM delete

hi m janvi
How To Make a Cell Phone Jammer?

Reply
avatar
April 26, 2013 at 5:57 PM delete

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

Reply
avatar
May 27, 2013 at 11:35 PM delete

sir 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??

Reply
avatar
May 28, 2013 at 10:48 AM delete

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

Reply
avatar
May 31, 2013 at 11:14 AM delete

i 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)..

Reply
avatar
June 12, 2013 at 11:21 AM delete

sir , 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??

Reply
avatar
June 12, 2013 at 4:45 PM delete

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

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

Reply
avatar
June 18, 2013 at 3:54 PM delete

hi 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.

Reply
avatar
June 19, 2013 at 3:17 PM delete

Hi Rashel,
you 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.

Reply
avatar
June 22, 2013 at 12:31 AM delete

Hi Swagatam

Here 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?

Reply
avatar
June 22, 2013 at 12:44 AM delete

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

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

Reply
avatar
June 22, 2013 at 11:06 AM delete

Hi Abu-Hafss,

The 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.

Reply
avatar
July 23, 2013 at 6:16 AM delete

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

Reply
avatar
July 23, 2013 at 9:00 PM delete

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

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

Reply
avatar
July 24, 2013 at 6:46 AM delete

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

Reply
avatar
November 22, 2013 at 1:37 PM delete

Hi 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.
email- biswajitdas49@gmail.com

Reply
avatar
November 23, 2013 at 9:51 AM delete

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.

I 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

Reply
avatar
Segun
November 25, 2013 at 2:23 PM delete

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

Reply
avatar
November 26, 2013 at 10:45 AM delete

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

Reply
avatar
November 28, 2013 at 1:02 PM delete

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

Reply
avatar
November 28, 2013 at 9:06 PM delete

Hi Biswajit,

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

Reply
avatar
December 25, 2013 at 11:56 AM delete

sir , 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 ) ?

Reply
avatar
December 25, 2013 at 7:42 PM delete

Hi 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..

Reply
avatar
December 26, 2013 at 11:59 PM delete

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

Reply
avatar
December 27, 2013 at 12:51 PM delete

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

Reply
avatar
December 28, 2013 at 10:53 AM delete

The 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.


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

Reply
avatar
December 28, 2013 at 7:15 PM delete

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??

thank you for your time,

Reply
avatar
December 29, 2013 at 11:13 AM delete

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

Reply
avatar
December 29, 2013 at 11:14 AM delete

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

Reply
avatar
January 2, 2014 at 11:11 AM delete

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

Reply
avatar
January 3, 2014 at 12:16 PM delete

it 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....

Reply
avatar
March 31, 2014 at 5:42 AM delete

Hi Mr. Swagatam,

i 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.

Reply
avatar
March 31, 2014 at 1:01 PM delete

Hi Mr. Ariel,

You can try the following design:

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

Reply
avatar
April 1, 2014 at 7:03 AM delete

Hi Mr. Swagatam,

Thank 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

Reply
avatar
April 1, 2014 at 10:57 AM delete

Hi Mr. Ariel,

The 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

Reply
avatar
April 3, 2014 at 10:02 AM delete

Hi Mr. Swagatam,

Thank 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

Reply
avatar
April 3, 2014 at 11:31 AM delete

Hi Mr. Ariel,

You 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

Reply
avatar
April 6, 2014 at 3:23 PM delete

Hi Mr. Swagatam,

The 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

Reply
avatar
April 6, 2014 at 7:43 PM delete

Hi Ariel,

the 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.

Reply
avatar
April 7, 2014 at 7:17 AM delete

Hi Mr. Swagatam,

I 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

Reply
avatar
April 7, 2014 at 11:35 AM delete

Hi Ariel,

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

Reply
avatar
August 9, 2014 at 9:17 PM delete

hi,
I 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.??????

Reply
avatar
August 10, 2014 at 8:23 PM delete

Hi,
If 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

Reply
avatar
August 11, 2014 at 10:52 PM delete

Helped me a lot,

thanks,
with regards.

Reply
avatar
August 19, 2014 at 1:35 PM delete

Hi Mr. Swagatam,
i hav 3055 tr old inverter. it can fractuate output in Changeover time..how to solve this problem...??

Reply
avatar
August 19, 2014 at 9:18 PM delete

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

Reply
avatar
September 8, 2014 at 9:51 PM delete

Hi sir,
I 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

Reply
avatar
September 9, 2014 at 10:28 AM delete

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

Reply
avatar
December 4, 2014 at 5:21 PM delete

Hi,
Do you have any ideas on implementation of complex PWM techniques like Space vector or harmonic elimination techniques in Multilevel inverters using microcontrollers?

Reply
avatar
December 6, 2014 at 7:51 AM delete

Hi, it can be done using ordinary discrete components, MCU may not be required, I had seen one nice article on this but find out now, I'll try to locate the pdf and post it in this blog for your reference. I have no idea how to do it with MCUs.

Reply
avatar
December 19, 2014 at 1:34 PM delete

Hai,
I want to make a circuit to generate missing phase from 2phase in 3phase.beause in my area some times 2 phases are avilable.3rd is not.
The 2phase voltages are 230 and 190,from phase to nutral
Please provide the circuit with thyristors are .mosfers for 5kw.
I hope you will help us.
Thanking you sir.

Reply
avatar
December 20, 2014 at 4:41 PM delete

Hai, I'll try to design it and post it soon for your reference.

Reply
avatar
May 15, 2015 at 8:01 PM delete

Dear,
I've recently purchased a frequency meter for the ease of making my projects.
what i wanted to know was if use the meter to confirm the mains frequency, could i use a resistor in series with the meter just for added protection,
here i wish to exercise caution while in such measurements cause the meter was quite expensive, meter has a single dial for freq. upto 200KHz.
for the resistance, what value according to you should i use to measure the freq. safely?
Thanks

Reply
avatar
May 16, 2015 at 2:06 PM delete

Dear Sherwin, you can use any high value resistor, although the meter already has one internally....you can use a 100K resistor for example.

Reply
avatar
May 16, 2015 at 4:18 PM delete

Dear,
The low power inverter circuit diagram that uses 4047ic and two mosfets, was successfully done by me and i got the results in the first shot itself.
transformer i used was 12v cen.tap 5a.
I have one question about 4047 ic;
now that the output pins 10,11 are half freqs, to make them a single output and get a full waveform at the output,
what came to my mind was that could i pass the 10,11 outputs to the outer taps of a center tapped inductor,
with suppose 10+10 turns of solid wire, and take the output from the centered tap,
is this correct?
will i get a full frequency waveform at the output?
Thanks

Reply
avatar
May 16, 2015 at 5:44 PM delete

Dear Sherwin,

what you are getting from your 12-0-12V transformer output is a full wave AC so there's no need of any other modification in the design, moreover the IC4047 outputs are too weak and are not specified for handling transformers directly, that's why power devices are employed with the outputs of the IC for driving the transformer.

Reply
avatar
June 1, 2015 at 8:45 PM delete

I got the UPS to look at, what I realize is that when plugged in to the ac source it delivers 117v ac to surge protection section and battery backup at 50hz, if i unplug it from the ac source and run it on batteries only I get 81v ac at 100-121hz.... I checked the batteries its 2 12v batteries in series and its giving 25v and the terminals in circuit so thats not why I am getting ow voltage and high frequency, do you know what could be giving the problem with the inverter section of that UPS

Reply
avatar
June 2, 2015 at 2:48 PM delete

check the current consumption without any load connected by attaching the meter probe in series with the battery positive....the meter should show negligible consumption, also check the transformer it could have got damaged or burnt internally...lastly check the battery voltage while the inverter is powered without any load, it must not show a drop in its existing voltage reading...

if all the above are found to be correctly working then surely the issue could be in the circuit board

Reply
avatar
June 26, 2015 at 10:46 AM delete

hi Mr. swagatam, will need your help on what component to use to produce a 2kva pure sine wave inverter because it is my final year project on school. So, i will your help on this sir.

Reply
avatar
June 26, 2015 at 7:51 PM delete

Hi Timilehin, you can try the following circuit, just make sure you use the right mosfets and the right transformer in terms of wattage.


http://www.homemade-circuits.com/2015/05/simplest-pwm-modified-sine-wave.html

Reply
avatar
June 27, 2015 at 2:23 PM delete

Hello Swagatam,

Do you have any technology for DSp based Sine wave inverter with PWM solar charger ?

Reply
avatar
June 27, 2015 at 5:33 PM delete

Hello rajath, if you can provide more details regarding what DSP must include specifically then I can do some research on this...

Reply
avatar
July 8, 2015 at 3:46 AM delete

hello sir
i want to ask whether i can use 100AH for a UPS so that it could work for some hours

Reply
avatar
July 8, 2015 at 11:41 PM delete

hello sir
i want to ask how i could use UPS circuit for inverter

Reply
avatar
July 9, 2015 at 7:45 PM delete

hello timilehin, the AH level can be of any magnitude, it won't affect the inverter, whether it's 100 AH or 1000 AH it can of any value depending upon how much back you may be needing

Reply
avatar
July 10, 2015 at 8:14 AM delete

UPS is an inverter (with a built-in charger), you use it the way it is...

Reply
avatar
July 14, 2015 at 5:39 PM delete

Hi. Thank u for an awesome web site it has really enlightened me. Please can u advise - we have two inverters which have failed not sure why. We tried the inverter on our outside lights which are 10 smd led spotlights. I have noticed that some of them have the earth wire lying unconnected. Both inverters worked the entire night then failed. Is it possible that a charge has built up and leaked into the inverters due to no earth connection on the less. Could u also advise on how the inverters should be earthed running from a desperate DB. Thank you. mitchell

Reply
avatar
July 14, 2015 at 7:44 PM delete

Hi Thanks, no I don't think so, the earth connection might not be the reason of the failure, it could be simply due to over heating of the inverter power devices or you might have overloaded it above its specified limits. next time make sure to add a fan cooling and see if it helps.

Reply
avatar
July 16, 2015 at 12:02 AM delete

Thank U for the prompt reply n Greetings from South Africa. We had 10 10watt smd led spotlight running off a 2500w inverter for 2 hours off grid then remain of night it switched to on grid. It failed in the morning. Having run from 18:00 - 08:00. Think U . Best regards

Reply
avatar
July 16, 2015 at 11:51 AM delete

Then may be the inverter quality is not good.

Reply
avatar
July 18, 2015 at 10:10 AM delete

Hi. I hope I haven't repeated this having prob with tablet. Does the inverter neutral output have to be bonded to earth if u r having a dedicated DB only for a few circuits? The only link between the main DB and the inverter DB is the earth.
We r using 220v AC 50hz. Inverter is a pure sine wave. The casing has no connection for earth should we earth i
I hope I'm making sense. Thank u

Reply
avatar
July 18, 2015 at 5:03 PM delete

Hi, As far as I know, the earth of the inverter is just it's chassis, which has nothing to do with the neutral, by the way inverters don't have a neutral normally...both the output wires of an inverter go through an alternate phase and neutral changeovers...so there's no fixed neutral for an inverter.

Earth is crucial for the house mains AC normally, for inverters this may not be relevant with its output mains

Reply
avatar
July 20, 2015 at 1:53 PM delete

Hi. Is it ok for me to be on this forum as I am neither a proffesional a hobbyist? It takes me a while to figure out those stuff which is common knowledge to you guys. i tackle anything but knowledge first is prioritY to me. Thank you. Regards mitch

Reply
avatar
July 21, 2015 at 8:09 AM delete

Hi, Anybody who is interested in electronics can join here and discuss, it's the interest and dedication that's important not the level of knowledge one may have at the start.

Reply
avatar
July 21, 2015 at 12:11 PM delete

Thank you. So i can tie the inverter casing to the normal house earth even if there is no provision for it on the casing.(manual is 1page and no mention of earthing). Also what happens if i switch a plug off will it still be live as only one is wired to the switch.

Reply
avatar
July 21, 2015 at 2:34 PM delete

according to me the earth of the inverter can be connected with the house earth.

If the plug wire is through the switch then the connection will be cut off and there will be no LIVE on the wire

Reply
avatar
July 21, 2015 at 7:02 PM delete

Sorry I should have explained properly. The output of the inverter now goes into a mini DB where the live goes into a breaker. The neutral is tied to the neutral bar. If the inverter is alternating bet the two wires won't the "neutral" still be live even if I switch the breaker off.

Reply
avatar
July 22, 2015 at 1:13 PM delete

Hi. Do u have any breakdown of how to intergrate the inverter supply with grid supply(not necessarily to feed into the grid). With respect to safety, wiring n equipment protection. II've done a lot of research on the topic n gained a lot of knowledge n confusion.
Also Is it advisable to have a system where the inverter is fully powered down only comes on automatically within a time frame to provide backup power and charge the battery n switch off.
Thank u

Reply
avatar
July 22, 2015 at 1:48 PM delete

To prevent this you can just leave the neutral of mains unconnected to the inverter second wire....let only one of the wires of the inverter be connected with the LIVE of the house mains, that means the neutral of the house mains will act as a common neutral for both inverter and the grid mains.

Reply
avatar
July 22, 2015 at 1:55 PM delete

.....you may refer to the following set up which shows the implementation details of an automatic grid to inverter changeover system and vice versa:

http://www.homemade-circuits.com/2012/09/automatic-inverter-supply-and-mains.html

Reply
avatar
July 24, 2015 at 12:30 PM delete

Hi. thank u. I need to understand this as I am led to believe that the grid n inverter power should be isolated. From each other.

Reply
avatar
July 24, 2015 at 12:36 PM delete

Hi n Thank u. I'm a bit confused as I was under the impression that the inverter power should be fully isolated from the grid. Would connecting the neutral this way cause leakage into the surrounding grid.

Reply
avatar
July 24, 2015 at 1:55 PM delete

my suggestion was for a GTI, if your application is not a GTI then this method will not be applicable, rather it should be implemented through a changeover relay, as described in the following article:

http://www.homemade-circuits.com/2012/09/automatic-inverter-supply-and-mains.html

Reply
avatar
August 18, 2015 at 11:00 PM delete

did you get the message I sent in the forum section?

Reply
avatar
August 19, 2015 at 1:36 PM delete

yes I saw a few pending requests in my "circuit-tutorial" forum, due to my busy schedule I am unable to attend them....please feel free to express your thoughts here...

Reply
avatar
December 2, 2015 at 7:05 PM delete

please can i use the design of pure sine wave inverter using 4047 ic to build an inverter rating of 2kva please guide on what to do because i want to build inverter of that rating

thanks best regards

Reply
avatar
December 3, 2015 at 9:06 AM delete

yes you can do it...just use the following explained stage at the output:


http://www.homemade-circuits.com/2014/10/upgrading-low-power-inverter-to-high.html

Reply
avatar
December 5, 2015 at 8:26 PM delete

sir in my circuit i,m having 50.79hz in both pin 10 and 11 and 101hz pin 2 of ne555, 426hz in pin 2 of ic2 and 101hz at pin 5 of ic 2

pleas sir is 180k rsesis a pot? and which of the is responsible for the 2khz and also i use ne555 for the 3 because 7555 is not avalaible. please what could be wrong with my circuit



sir if the 180k is a pot where did the third terminal go to?

Reply
avatar
March 12, 2016 at 4:35 PM delete

Dear Swagatam Majumdar:

In proteus i got two AC voltage sources and intentionally make a shift in the phase and changed the frequency of 2nd one. Now i want to synchronize the second source with the first. so, please what circuitry i use here to synchronize the second one with first. please help me... waiting for reply..
Many thanks..

Reply
avatar
March 12, 2016 at 5:46 PM delete

Dear Fazli, I am sorry, I have no idea about it.

Reply
avatar
March 12, 2016 at 11:12 PM delete

Dear Swagatam :
Have you any other idea about synchronizing circuit for two ac sources. means to match their frequency,voltage and phase. if you have... please share with me .. i need it.

Reply
avatar
March 13, 2016 at 11:37 AM delete

Dar Fazli, I a sorry I do not have any idea regarding this at the moment.

Reply
avatar

Readers are requested not to include external links while commenting. For consulting a diagram, upload it on Google Drive and provide the link here.