3-phase 380V inverter with EGS031 and EGP3000W boards

[ian.gordons]

OK, I'm maybe late.... BUT, in the original specs, the IRF840 is Used perfectly Correctly (not the ZN75... thingy) Why ? Because it has a RDsOn maybe poor But à Vds of 500V ! It makes use of a 400V power rail, and No transformer. Like with everything, sorry to be pedantic, but people, please RTFM

 

[FBI6900]

I'm definitely a little late to the party on this, but I have just started looking into this design; I plan to run it off of a ~380v EV battery, and I am hoping to get a little more than 3kw out of it.
I have been reviewing the documentation and discoveries in this thread, and I am thinking if the board is able to handle 400v at 8a (IRF840) and 80a at 12v (75NF75), then why wouldn't it be able to handle 400v at 80a?
I have settled upon the IPZA60R024P7XKSA1 MOSFETs for a somewhat cheap, ridiculously high power transistor that seems to meet the gate threshold and resistance requirements for this application.
I calculated that 110a at 24mΩ (RDS(on),max) would need to go through this transistor to reach the 291w max power dissipation listed in its datasheet. Of course, they wouldn't be running anywhere near that, but even 380v at 80a is still 30.4KW, a significant improvement over either of the other transistor choices.

Can somebody tell me if I am missing something, or maybe on to something?

 

[FBI6900]

I'm definitely a little late to the party on this, but I have just started looking into this design; I plan to run it off of a ~380v EV battery, and I am hoping to get a little more than 3kw out of it.
I have been reviewing the documentation and discoveries in this thread, and I am thinking if the board is able to handle 400v at 8a (IRF840) and 80a at 12v (75NF75), then why wouldn't it be able to handle 400v at 80a?
I have settled upon the IPZA60R024P7XKSA1 MOSFETs for a somewhat cheap, ridiculously high power transistor that seems to meet the gate threshold and resistance requirements for this application.
I calculated that 110a at 24mΩ (RDS(on),max) would need to go through this transistor to reach the 291w max power dissipation listed in its datasheet. Of course, they wouldn't be running anywhere near that, but even 380v at 80a is still 30.4KW, a significant improvement over either of the other transistor choices.

Can somebody tell me if I am missing something, or maybe on to something?

Nevermind, I discovered that these MOSFETs can handle EITHER 600v at 0a or 101a at 0v, only one or the other, not both (I gotta learn how to properly read a data sheet). So instead I am now looking into buying a salvaged Chevy Volt inverter to extract 2, 3 phase 600v 650a MBB600 IGBT modules for ~350kw of power. I am going to need some extra power filtering on the output, but I think it will work.

 

[Prometeuszmal]

Hi

did someone have correct shematic for this board. Because non of this shematic are correct, they have a lot missing informations. I mean corect information for lines BAT, VADJ and TFB. I have a EGS032 and it this exactly the same board like EGS031. And i have stil the same problem whit 4 blinks of LED.

 

[Delta Prime]

I have a EGS032 and it this exactly the same board like EGS031

Then how come it has a different number?

First thing is hello.
Do you know how to introduce yourself?

Ditto.

 

[Prometeuszmal]

Then how come it has a different number?

Ditto.

Hello
yes they have two different number. But i check every part on the board and they are the same. I have two boards now EGS031 and EGS032 where problem its the same. Only diferent in whole project its step up transformer i use 3 separate transformers 24v to 380v.

 

[sophonsin]

Thank you very much for the tip. Now it works finally!

hi AlkazG
my driver EGs031 not work .can you help me!
i don't know how to connect JP.. to JP..?

 

[sophonsin]

Hello
yes they have two different number. But i check every part on the board and they are the same. I have two boards now EGS031 and EGS032 where problem its the same. Only diferent in whole project its step up transformer i use 3 separate transformers 24v to 380v.

hello sir !
did the inverter you works right now? i have problem with EGS032 its not work i dont know why ? Is the EGS032 need to apply program ?

 

[Franksonic]

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

Greetings I designed to operate on 48v Battery but I dont know what the transformer secondary voltage should be on each phase am winding it the locally.

 

[Franksonic]

Hello,

I have a problem with this device, I'm getting 4 flashes/beeps. As I translated it means undervoltage. I'm feeding inverter with 48V DC I also tried to raise rails to 60V with no difference. Feedback transformes are 220V/6V. Any idea where is the problem?

Best regards
AljazView attachment 47442

Greetings sir, please where you able to solve this issue and how did you solve it help me please am facing same challenge.

 

[Prometeuszmal]

HI all new people on this topic

Nobody from people what working on this topic before will not help you. I try all posible ways to do this i also feed directly correct voltage all between 2.1v and 2.9V on pin 22 (on the board). I also use 2 diferent feedback transformers whit 6v and 12v output. I also use 2 diferent Boards whit numbers EGS031 and EGS032. I try make resistor divider on shematic marked whit resistors R29 and R34, where R34 its +48v and R29 its ground. i also try do the same thing what @AljazG do.Still nothing works. I have still 4 beeps.

 

[robmar]

Still nothing works. I have still 4 beeps.

First, I can assure you that the circuit, when properly assembled, is working correctly indeed. I made two of them, that are still in use after many years.
So, the problem has to be troubleshooted within your build. From a bad joint, to a wrong value component or a faulty one, possibilities are endless.
The easier (and possibly the only) way would be to define some test points to be checked against a working board.
Now I'm not at home till the end of August, but once I'm back I can try to measure some voltage/signal on critical points and post them. This could help also other users having issues with this circuit.

 

[Prometeuszmal]

First, I can assure you that the circuit, when properly assembled, is working correctly indeed. I made two of them, that are still in use after many years.
So, the problem has to be troubleshooted within your build. From a bad joint, to a wrong value component or a faulty one, possibilities are endless.
The easier (and possibly the only) way would be to define some test points to be checked against a working board.
Now I'm not at home till the end of August, but once I'm back I can try to measure some voltage/signal on critical points and post them. This could help also other users having issues with this circuit.

HI

if this be possible, nice will to have HD photo of both sides of asembled PCB. I think that PCB can be also badly created.

 

[Alirezanadalinezhad]

Hello,

I have a problem with this device, I'm getting 4 flashes/beeps. As I translated it means undervoltage. I'm feeding inverter with 48V DC I also tried to raise rails to 60V with no difference. Feedback transformes are 220V/6V. Any idea where is the problem?

Best regards
Aljaz

Hello,I have this problem, my email : [mod edit: E-mail address removed to protect privacy. Please use PM (start coonversation) or post here to conact Aljaz]
voltage pin bet =2/5v adgust voltage =2/5 v isoleh 5 v 15vdc but signal not shown. but your magol egs031 is corrected please me this solve problem. thanks
===================================================================================

I have a problem with this device, I'm getting 4 flashes/beeps. As I translated it means undervoltage. I'm feeding inverter with 48V DC I also tried to raise rails to 60V with no difference. Feedback transformes are 220V/6V. Any idea where is the problem?

Best regards
Aljaz

 

[Alirezanadalinezhad]

egs031 dont work because signal ho and lo not show on osiloscope , vs a, vsb , vsc have voltage 13 volt , wire out phase have 13 volt dc but vs =0 volt must to be what signal out from ic corrected work , pin ifb feed back current is zero voltage. vfb a,b,c is 2.5 volt. vadj is 2,5 volt dc ,bet voltage pin22 is 2/5 volt. but board EGS031 dont work and not signal from LO and HO a,b,c . do you what undersatnd in your mind, I think what vs a,b,c dont must to be voltage . and you what mind?

 

[Alirezanadalinezhad]

test board egs031 that this board is technical corrected.

 

[Alirezanadalinezhad]

vs a on data sheet not connected to egp 3000w board what is corrected?

 

[Prometeuszmal]

Hi again
so i make fiew tests and maybe this for someone helps. I remove whole part for generating +15v and +5v and i replaced this whit 2 step down conwerters XL7015. Also i solder elements for drive board like on photo. And after all this i have wierd behaviour that i have just 2 beps, and sound like transformer want start. But he not want work still. I first think that i need more power because i used first 11 Liion bateries in series, but after adding double of Liion bateries i buck to 4 beps. I have on input 49v. Did someone who have working versions of this board can send photo of elemets located under EGS031 board ? And did can say what he use for powering device, and what voltage have on input of the board.

 

[Prometeuszmal]

So after a year i found this 4 beps and blinks, its for over temperature error. For working this board its only needed to put on C45 capacitor from component list, listed as 0.1uf and on RT1 put 10kohm thermistor and done. Board works. I can't continue test beacause i blown mosfets. Propably because to high voltage (54v) or bad transformer ( input 20v output 230V ). Will be nice to have information about what maximum voltage you can feed to the board. And also waht transformers you use ( what kind of input voltage it will works ).

 

[cos000]

Hello to everyone
I have this board laying around since few years.
Few days ago I took it and I decided to build it.
I have only few questions to the people who have already build this inverter:

1) Which current-sense-resistors did you use? the holes on the board are 12,5mm distant which allow 1W sense-resistors. Shouldn't I use 3-4W resistors instead?
2) With stock components could it be used 400V transformer instead of 380V one?
3) Always with stock components could the DC BUS voltage be increased to 60V to reduce a little bit the incoming current?

Thank you

Giulio