After my failed attempts to use a Prius inverter in my Touran (for charging, DC/DC and 230V AC generation) I am now trying my hands at modifying a Chinese-made 12V to 230V sine inverter to run from 360V DC directly.
I should add that the inverter roasted its sine filter coil after a short amount of time and then exploded its IGBTs. I have now replaced it with a 3 kW "sine inverter board" as suggested by NiHaoMike and that works so far (also EG8010). Kind of, actually, the bus caps seized after some time and the sine filter coil wiggled loose. Fixable though.
Looks like it is based on the EG8010 IC, it is worth downloading the datasheet for details. They can be set up for variable voltage and frequency output.
@@KuntalGhosh EGS002 is the PCB with the EG8010 chip on it, data sheet for EGS8010 is more detailed and incudles the EGS002 board circuit. There is a design flaw on the EGS002 that can blow the MOSFETs on startup. I have been running my house with an 8KW 48V Inverter I built myself for the last 7 years.
@@Stefan_Dahn The LM393 circuit causes random situation where all MOSFETs are turned on at the same time on startup. To disable the LM393 on the EGS002 remove R7 and C21 then short C21 contacts. This pulls down to ground both negative inputs into the 2 opamps on LM393 as well as the 8010 IFB. This now ensures the gate drive chips will never get a high input on the shut down pins, nor let the 8010 receive a SPWMEN low to disable output.
Thanks much, my inverter with the EGS002 has been, twicw, shorting and burning the output IGBTs precisely as you say on trasients on STARTUPS when the condensers are still charged,it seems, amazing that you caught that, i will try what you said, and do you know if that does not bring any other problems? thank you; @@XXXXIndices
Bought an identical one and surprise, surprise it lasted 3 seconds; BANG! and then smoke from inside. The sound was really loud, like a gunshot. Didn't even get a chance to plug in anything and was dead. The DCV display was still working, green LED on, but the AC display was dead and of course no power on the AC side. Made in china; what to expect? Clearly was not tested before leaving the factory, otherwise they would have enjoyed the bang, not me.
The best thing is that the Lvyuan inverter there, it has the EGS002 control board inside; not quite the EGS002 but perfectly interchangeable; so this inverter is repairable ,the EGS002 boards are only 4 or 5 dollars other inverters with the control ICs numbers sanded off,most of them, are to avoid
This is interesting. What is a limiting factor of this circutry? Output transistors? I'm really scratching my head about to buy a 48v 15kw inverter. Its gonna be so nice to use a prius inverter to do so. I need to run my IGBT welder and air compressor.
Can you share the link where you bought it from? I am looking at different inverter options online and can't find exactly same inverter as in your video. They all differ slightly. So my concern is that they might differ inside also. Thanks.
I ended up buying 2000W DC to AC DIY sine wave inverter kit from Aliexpress for 31 Euro (not assembled). Will give it a try. The only concern I got now is isolation. By looking in to datasheet it looks like the only thing that divides AC side from DC side is mosfets. There might be spectacular fireworks going on if these mosfets fail :)
@@ev-olution8597 Yes, no transformer. I am using a small 12V-to-12V DC/DC converter to power the logic, otherwise the cars chassis would be connected to HV!
For incorrect current readings on display you might be bypassing resistor for current sensing by connecting DC power feed after it. It looks like you applying DC power straight to capacitor. It should be a very low value resistor or peace of wire that acts as a resistor connected between real GND and capacitor GND. You must connect DC power supply GND before that resistor to get correct current readings on display.
