Well said.

But it would be pretty great if there was a good open hardware design for a 1000-2000W 12V to 220V inverter around.

@FQD2N Extremely high current is available, and there are nasty frequencies involved. Touch the wrong thing and you might have 40A at 6kHz flowing through you. I bet that would hurt like the dickens and you probably wouldn't be able to let go.

As someone who worked on a grid connected solar inverter. You're right. Its even harder when you have to design it according to set standards. Minimal Harmonics and leakage current etc.

@FQD2N well what if you are electrically grounded?

FULL BRIDGE RECTIFIER!!!

😀😀😀

Me too... Lol

FUulBriDgeRectIFiyAR

That would be grand

Using an audio amplifier with step up transformer to make a sine wave inverter is something that can be done in a pinch and actually works fairly decently. Just don't expect a stable output. Oh and it also is very dangerous, obviously.

That's why I never do it :-)

@@Electroblud can be isolated.

@@Electroblud It's a pretty poor one, the proper way to make an inverter is to step-up the DC bus voltage before feeding it to your inverter, that way you only need a high frequency SMPS transformer instead of a mains transformer. Also, if you're looking for electronic components, Arrow.com offers free shipping worldwide on any order. They just don't have everything in stock like digikey does.

I remember seeing a 3 phase 400Hz 220V power supply built using H&H audio amplifiers in a aircraft instrument factory during the 1980's. It was a very fine piece of equipment and gave a very impressive performance. The disadvantages were that its efficiency was abysmal and it was not very portable. It was mounted in its own 19" rack with heavy duty castors.

great idea.

Hi What do I need to build 10k watt inverter?

@@jamesjohnson5700 Depends on a lot of things. What input voltage, what output voltage, What type of what you want on output (sine or pseudo). A 10kw inverter may seem a big deal but you can already get 3kw inverters off the shelf at Walmart or a large hardware store.

@@francoisleveille409 I wanna build my own with high & low voltage protection & can the input & output be the same I want sine

@@jamesjohnson5700 You'll have to give more detailed specs if you want something from me. Also, I can't exactly give you a detailed schematics in a comment section.

You're welcome and thanks for the support.

that's why I always have a "blow up" filament lamp in series with the power supply of what I'm testing.

Oh stop it

@@greatscottlab Im never gonna stop it : - )

​@@mathiasbackof4993 yes we don't stop cheering you until you stop working so hard to teach people electronics which is hopefully never because this channel is asweome :)

Thanks for the feedback :-)

Good good

Azeem bayi ya kafi cheta banda haa, app ki tarah :)

Wtf

Weird

Please use Chinese if you want to communicate with him

@@antonf.9278 对不起

Now I understand Thanks

Are you Estonian?

@@markusantonov6373 İf you're talking to me, no 😁

Same dude same

No, he got angry when he built a Bluetooth ceiling speaker. "I destroyed the receiver because I am such a *genius* ".

@@chargedsupercap2270 He called things bullshit multiple times before aswell.

@@jm036 But he never got this angry lol

Ambilight part 3.

@@elek101 exactly.

You can use Chrome to do it on the webpage too

And you will get very strange language with it. Because chinese hieroglyphics are overcomplicated

questoin: type the translate languege

Just use the "translate document" feature of google translate. Makes life much easier

Chinese doesn’t translate well to English. It’s fundamentally different. You can make a translation just fine for the words, but not necessarily for the meaning behind them. That’s always an issue. 🤷‍♂️

I just read your comment after making a post something similar about inverter sizes and power drains

I designed my inverter system from scratch and generated spwm using PIC microcontroller. I had no load power of around 40W and had been researching if that is too much because I feel my MOSFET and transformer heats up more than required. I switched at 18kHz

Rikka0_0 we can gather ideas,and make an open source project,maybe..

Will do. I deals with vfd controllers too. I thought that chip could be used to control motors. Good point.

​@@olandorobertson2510 any progress ??

Yes wow

It is on my to do list

Ooh, good idea! It would be awesome an electronic basics on class a, b, ab amplifiers!

@@greatscottlab yeeeesss!!! Thanks! I really like your videos!

Tim, can you share a schematic for a inverter?

@@user-pe2qv1zu1z Yes no problem. But i don't know where to share it...any suggestions ?

@@timm3802 can I have a copy of your designed inverter? I want to build one with only small power rating like 200-300W for lights backup only uses and phone/laptop chargers.

Tim M may be on my email? kovachev.g90@gmail.bg

@@user-pe2qv1zu1z no problem, I will mail it to you.

#FULLBRIDGERECTIFIER

*presses echo pedal* "FULL BRIDGE RECTIFIER"

Expecting him says Brückengleichrichter :D

*RECTIFIER*

Rectumfrier!!!

Well the problem with the wave isn't because of the low current signal. It's because of the nonlinear characteristics of the inductor, the transformer, and the load. So, for example, in an exceptionally simple case, a rectifier draws more current when it gets to the peak of the sine wave, which brings the voltage down (mainly due to resistance upstream in the power path, like the inductor and the mosfets) only at the peak and gets us that sine with the flat bit at the top. I actually really like your thinking there, though. Largely because I thought of a similar thing a while ago. There do exist rotary converters, which is basically just either a DC motor spinning a single-phase generator, or a single phase motor spinning a 3-phase generator. The problem with these is that they're big, heavy, loud, but most importantly, they constantly consume current even at no load. They're good for some uses, like if you need 3 phase power when you only have single phase, and you only run it when you're running a big tool or something so you don't care about its inefficiency because it's not running for very long. But inverters are much better for general purpose use, which is why they get used so much. I believe they're also more efficient even at full load. You get a lot of eddy current losses in the big steel plates you need for a mains frequency transformer/motor. Inverters step up voltage at much higher frequencies (10s-100s of kHz), which means a much smaller transformer -> less steel -> less eddy current losses -> more efficiency. The trick to making a good sine wave with the inverter is all in the filtering. Picking the right combination of inductors and capacitors to balance the cutoff & resonance, good high frequency filtering while not suppressing the fundamental frequency that you want to keep, an also keeping component cost and size in mind. High current, high inductance, low frequency inductors get real big real fast. And since they use thick copper wires, they get expensive real fast too. And you can't use the advantage of the high frequency switching needing a smaller core like we did with the transformer because mains needs to be low frequency. This, by the way, is why cheaper inverters have more THD. They use cheaper components that don't filter as well (and probably spent less R&D money as well) so you get more harmonics. I'd say likely the most expensive parts of any inverter are the filter components.

Most inverters step low voltage up to 400V then use full MOSFET bridge to create 240VAC from that 400V. This improves the efficiency and size as transformers work at 20kHz to generate 400V and conversion to 240VAC only needs simple filtering. Example: I have a 3000W Chinese sine wave inverter which has a no load power of around 10W

no，我也是

我也是

That would really help, here is the chinese datasheet. datasheetspdf.com/pdf-file/968003/EGmicro/EGP1000W/1 Using Google, it suggest the board can either be used with a high voltage input or with a low voltage and a transformer. In the latter case, I thought you need a small second transformer on the output side to provide an isolated low voltage voltage to the control board but I couldnt see that in the video......

Please do sir

no

That is the best way no fuzz:))

And call it = noisy hardware pswi 😂

Yeah it will work but with considerable energy loss , the following method show in video have negligible energy loss

Not sure if I am that interested in such a subject.

Considering he is a native German I would say that's super languageception

@@4.0.4 Cakes ?? Why ? xD Bread, ok, frog legs, ok, but cakes.... Why :)

@@4.0.4 i agree with the kebab thing. But that's a bad part of french gastronomy... 😉

ahmed fawad can i question for you ? I am building inverter 12vdc-220vac using egp1000w and gs002 make by Chine. This is the same video above. But output vac only 120vac, i am using tranformer 7.5vac to 220vac and irf840. Please, can you help me? Share for me your project. Thanks so much.

Alex Mustang 😂😂😂😂☹️☹️ The good old doraemon reminds me a lot, do you know a site where we can see the anime

That is the cheap way...that also blows up easily. Seriously, even the expensive ones, like Sinergex keep blowing up. I have repaired many. A full bridge + 50Hz transformer can make a robust inverter with nice output. One thing though, the 1000W board has a input current monitoring circuit that causes a rather high voltage drop, this is not practical with e.g. 12V input.

8 Hours ago!?!?!?

It must be from the dried tears shed trying to understand the Chinese data sheet

@@araigumakiruno Patreon

I am power electronic engineer... Well, let me tell you the efficiency of 50Hz xfmr is >98% for distribution and transmission system While, typical smps operate at around 50-100kHz, of course there is some operating at 500k-1000kHz...but you will pay 3-4x the typical sms Fyi, I was working on wide array of projects: 500kHz converter, solid state transformer, grid converter

that is the way to do it,my 2 inverters of2500/5000 watts are like that.