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3-phase 380V inverter with EGS031 and EGP3000W boards
- Thread starter robmar
- Start date
Hello, I made a three-phase inverter using the EGS8031 and I am having some problems. did anyone here make one and succeed?
Hello Dear have your problem solve 4 flashes/beeps or not
I am also also facing this problem 4 blinks/beeps, no help avaible on any forum
@AljazG have you give feedback to board through bridge rectifier?? For VFA, VfB, VFC
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
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
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
Just wanted to add, to avoid misunderstandings, that pin #7 I mentioned is the chip's pin, the actual connector pin is #22.
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
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
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
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.
