Who would have already used a VFD inverter to simulate three-phase from 220V?

[phil59]

Here, everything is in the title.

I may need three-phase for a large consumer, like 4-6 kW, and not really want to change everything.

https://fr.aliexpress.com/item/10000403690528.html
I saw that....

Feedback from experiences?
Opinions ?

[Remundo]

I did not know the product.

but it could work, the system probably acts as a phase shifter at +/-120° from the mains single-phase sine

[Christophe]

Prizes!!

Me me me (finally in a few hours I will have used it lol)!

Uh is this a joke?

Or a hell of a coincidence...I just received one yesterday: self-construction-and-do-it-yourself/renovation-and-aerodynamic-improvement-of-a-closed-trailer-bpw-t17276-290.html#p508814



I'm going to configure and test it this morning...

It's a 220 - 220 three-phase model...I only intend to wire one pair on the output...to start...

[Macro]

What is not stipulated in the characteristics of the product at ali ... It is the duration of continuous operation, and the consumption of the drive ...

I have on my job a drive for a large vacuum pump (55kw) it must be continuously evacuated 3kw; in winters it heats the room in which it is located to 25°... In summer, the room has to be air-conditioned like idiots...

And there will be no miracle When you want to get 4kw out of it in sorting it will theoretically consume 7 of them in one phase... And I would say rather... 8 to 8.5...

If it's for occasional use like a lift or compressor... why not... If it's to charge your EV, mount your box outside on a pole far from everything

[Christophe]

What is not stipulated in the characteristics of the product at ali ... It is the duration of continuous operation, and the consumption of the drive ...

I have on my job a drive for a large vacuum pump (55kw) it must be continuously evacuated 3kw; in winters it heats the room in which it is located to 25°... In summer, the room has to be air-conditioned like idiots...

And there will be no miracle When you want to get 4kw out of it in sorting it will theoretically consume 7 of them in one phase... And I would say rather... 8 to 8.5...

If it's for occasional use like a lift or compressor... why not... If it's to charge your EV, mount your box outside on a pole far from everything

I have the manual in front of me, not too badly done for Chinese, there are even color photos... but there is no overall performance specified!

But if you have 3 kW of losses for 55 kW of motor power (= 55 / 0.8 = 69 electrical kW roughly speaking or 55 kW is the consumption or max power of the drive?)... that's 95.7% efficiency. ..if it's 55 kW electric then you have 94.5% efficiency...in both cases it's pretty good!

So disagree on your input power calculations... there will be a few % more...

For the lifespan, the manual speaks of changing the capacitor after 30 hours!

Well I started mine...it's my barre I have 550 V AC between 2 output phases (and it doesn't change much depending on the frequency...from 50 to 400Hz)...so I will test on an old half HS circulator...

Shit, I need to find my true RMS multimeter...

[Christophe]

I wouldn't call it a failure, it just didn't work!

The circulator does not start and I still have 320V at its terminals...on the unwired phase it is still 550V...at 50 Hz...I checked the reference, it is indeed the correct one. I thought it was a 380V output suddenly...

20220906_103150.jpg (354.81 KB) Viewed times 2359

Vevor A2-8022: it is a single and three-phase input model...

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Some pages of the manual including the wiring diagram:

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20220906_103307.jpg (254.17 KB) Viewed times 2359

So I don't think we can use this thing by wiring only one phase... It must have internal electronic security...

[Macro]

Ours is used to increase the speed of a pump by running it at 60hz instead of 50... I don't have the power curve of the motor, just the power at 60hz of 55 Kw... But hey, everything I can say.. It's that the drive is heating up.... To cool the cabinet (the cable trays had melted) we had to install a 200W fan on it '

[Remundo]

you are oxen

[Christophe]

We already knew that!

Have you seen his trailer?

[Christophe]

I found these 2 threads related to this question:

electricity-electronics-computer/frequency-variator-for-single-phase-motor-t9944.html

electricity-electronics-computers/making-three-phase-with-monophase-de-l-aide-stp-boubka-t10527.html

There are surely others ...