Maker Pro
Maker Pro

3-phase 380V inverter with EGS031 and EGP3000W boards

AljazG

Jun 30, 2019
8
Joined
Jun 30, 2019
Messages
8
Hi,

After some research I found if I short JP9 it goes to OFF state (1 blink/beep).

Robmar, can you please give your jumper configuration?

Best regards
Aljaz
 

Orcino Borges

May 4, 2020
1
Joined
May 4, 2020
Messages
1
Hello, I made a three-phase inverter using the EGS8031 and I am having some problems. did anyone here make one and succeed?
 

AljazG

Jun 30, 2019
8
Joined
Jun 30, 2019
Messages
8
Orcino, unfortunately no, still stuck with 4 beeps, error code translated from datasheet: Brown.
 

nick sharp

May 22, 2021
1
Joined
May 22, 2021
Messages
1
EG8030 the 4 led flashing is caused because the PD on the BET pin in the schematic is wrong, the low limit (under voltage) on this pin is 2.1 V and the high limit is 2.9 V (over voltage), the device will only work between these voltages this was found by testing not from the data sheet
 

AljazG

Jun 30, 2019
8
Joined
Jun 30, 2019
Messages
8
Thank you very much for the tip. Now it works finally!
 

Attachments

  • 20210523_083324-2.png
    20210523_083324-2.png
    389.5 KB · Views: 64

robmar

Dec 8, 2015
14
Joined
Dec 8, 2015
Messages
14
Hi all,
I'm back after a very long pause, and I see that other users have managed to build the inverter.
I'm attaching another schematic that is more accurate than the one found in EG8030 and this one worked fine for me. You can see that, about the pin 7 (BET/BAT) issue in my schematic the pin is indicated as connected directly to +24V (R29 short and R34 open)
The three small transformers are indicated as 220-12V and not 220-6V as someone did.
Also I'm attaching a datasheet of the exact components list, and later that day I'll post a picture of the jumpers configuration on EG8030 that worked for me.
Roberto
 

Attachments

  • EGP3000W Schematic.pdf
    120 KB · Views: 130

robmar

Dec 8, 2015
14
Joined
Dec 8, 2015
Messages
14
Component list
 

Attachments

  • EGP3000W_lista.pdf
    24.8 KB · Views: 97

AljazG

Jun 30, 2019
8
Joined
Jun 30, 2019
Messages
8
Hi Roberto

Thank you for the given information. As you said you must omit resistor to ground and short pullup to vcc and it works. Indeed there is problem with BET pin info in original datasheet. I have used 6v feedback transformers and its working without problem.

Best regards
Aljaz
 

robmar

Dec 8, 2015
14
Joined
Dec 8, 2015
Messages
14
You can see that, about the pin 7 (BET/BAT) issue
Roberto
Just wanted to add, to avoid misunderstandings, that pin #7 I mentioned is the chip's pin, the actual connector pin is #22.
 

robmar

Dec 8, 2015
14
Joined
Dec 8, 2015
Messages
14
Hi Roberto

Thank you for the given information. As you said you must omit resistor to ground and short pullup to vcc and it works. Indeed there is problem with BET pin info in original datasheet. I have used 6v feedback transformers and its working without problem.

Best regards
Aljaz

Glad to know, I used the 12V transformers and thus I was concerned that the undervoltage alarm could possibly arise from a too low feedback voltage, but luckily I see that's not the case.
Best regards
Roberto
 

Mani66

Oct 15, 2021
1
Joined
Oct 15, 2021
Messages
1
Hello, everyone
I am interested in the 3 phase inverter EGP 3000 W. You have already made experience with it. I would like to buy the parts from ALI Express. Later, when it is set up, the house is supposed to be supplied with electricity at night. I have lead batteries from Hopecke. 2 volts / 420 amps. 24 pieces, so that I have my 48 volts. In Germany I don't find any 3 phase inverters, except solar inverters. That's why I want to build myself.
Are there critical problems to build.
Thank you in advance for your help
Greetings from Germany / Black Forest
Manfred
 

Stuartsjg

Jan 22, 2022
2
Joined
Jan 22, 2022
Messages
2
Hi all,
I'm back after a very long pause, and I see that other users have managed to build the inverter.
I'm attaching another schematic that is more accurate than the one found in EG8030 and this one worked fine for me. You can see that, about the pin 7 (BET/BAT) issue in my schematic the pin is indicated as connected directly to +24V (R29 short and R34 open)
The three small transformers are indicated as 220-12V and not 220-6V as someone did.
Also I'm attaching a datasheet of the exact components list, and later that day I'll post a picture of the jumpers configuration on EG8030 that worked for me.
Roberto

Hello,

Great thread! I was looking at a 3ph inverter for phase conversion and i happen to have 12kW of 48V telecom rectifiers.

My question is the transformer, i see you use a 24V nominally rated primary, or 34v p-p.

For 48V battery sitting at 40 to 60V DC, would the transformer be more ideally sized with a higher voltage input?

I assume there will be a "sweet spot"? Whats the calculation or rule of thumb for DC voltage and transformer primary?

I have a 3 phase 55-0-55 to 3 x (0-240) and i think the 55V primary is not going to be drivable from a 40-60v DC supply.

Many thanks, Stuart
 

Haxby

May 11, 2022
2
Joined
May 11, 2022
Messages
2
Hello,

Great thread! I was looking at a 3ph inverter for phase conversion and i happen to have 12kW of 48V telecom rectifiers.

My question is the transformer, i see you use a 24V nominally rated primary, or 34v p-p.

For 48V battery sitting at 40 to 60V DC, would the transformer be more ideally sized with a higher voltage input?

I assume there will be a "sweet spot"? Whats the calculation or rule of thumb for DC voltage and transformer primary?

I have a 3 phase 55-0-55 to 3 x (0-240) and i think the 55V primary is not going to be drivable from a 40-60v DC supply.

Many thanks, Stuart

Hi Stuart,

The transformer has to work at the lowest battery voltage, so all calculations should be based on this figure.

So for your minimum 40V DC input, which remember is peak to peak, you need a transformer primary winding of 40/1.41=28.57

It could even be a little less than that because there will be losses in the mosfets or igbt h bridge, and further losses in the transformer while under heavy load. So a 25V transformer would be good.
 

Stuartsjg

Jan 22, 2022
2
Joined
Jan 22, 2022
Messages
2
Hi Stuart,

The transformer has to work at the lowest battery voltage, so all calculations should be based on this figure.

So for your minimum 40V DC input, which remember is peak to peak, you need a transformer primary winding of 40/1.41=28.57

It could even be a little less than that because there will be losses in the mosfets or igbt h bridge, and further losses in the transformer while under heavy load. So a 25V transformer would be good.

Thanks for the usefull info - i have the controller and blank board on order.

Your point about the transformer makes sense, i will be using 3 single phase transformers which are 25V/230V 1.2kVA each which avoids me needing to get anything custom made. I had thought if it was custom made then the feedback could be another winding on the main transformer but that would then regulate for losses in the main secondary winding?
 

Haxby

May 11, 2022
2
Joined
May 11, 2022
Messages
2
A Separate feedback winding on the transformer will regulate fluctuations in the input voltage and losses in the primary winding but it won't account for losses in the secondary winding. It will probably be good enough. But to account for losses in the secondary windings you will need to wire the 230v? output per phase to a separate little transformer, the output of which is used as the feedback voltage
 

abron

Aug 24, 2022
1
Joined
Aug 24, 2022
Messages
1
Hello everyone, You could translate sheet EG8030 using google translate, but you need to copy and paste each paragraph individually. Attached here is part of a translation I made for Portuguese (Brazil).
Here is 8030 english translation, unchecked.
 

Attachments

  • EG8030ChSimp.zh-CN.en.pdf
    1.3 MB · Views: 64
Top