Please see this link to tame the EG8010 board to be useable as a control for a resonable sized Oz inverter (shut down problem fix see all pages 1....) - including test to over 6Kw LINK and link to output board LINK

I have noticed that the inverter builds here seem to have now changed to the LF type design and for those wishing to drive loads that are not High C the surge performance is limited by the amount of battery storage not like a HF inverter. But for Hich C loads this is not the inverter to use. RF

RFBurns :
Please see this link to tame the EG8010 board

Thanks for info RF Burns.-
I agree with what is below:
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So it appears that the IFB pin on the board goes to not just the ifb pin on the chip... which would shut it down properly, but also to two differential amplifiers. These intercept the signal from the  CT, and then process it. One signal goes to the inhibit of the driver chips, and one to the inhibit of the main chip.

What this really means, is there is a short period where three things are competing for the right to shut the thing down on an over current event.... this leads to a train of small pulses from one of them, that causes the disasters with the torroid.... which one....... I don't care! ... the system has to go.....
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I have made in this way.-


hello RFBurn,
I read the article, but I do not find the solution adopted.
Interesting intervention time  ;)
[Quote]"Pin IFB measures the output load current for overcurrent protection detection. As the current sampling and feedback circuit shown in figure 8.1a, pin IFB’s reference peak voltage is 0.5V and overcurrent detection time is 600mS. If current is higher than inverter’s lad current by some reason, EG8010 will set the electrical level of SPWMOUT1 to SPWMOUT4 at “0” or “1” and shut down all
power MOSFET to decrease the voltage to zero depending on pin (9)PWMTYP’s setting. This function mainly protects power MOSFET and the load. Sixteen seconds after overcurrent protection
activates, EG8010 will turn on power MOSFET for 100ms to re-determine load current. If overcurrent issue still exists, EG8010 will repeat the process above every sixteen seconds. If EG8010
runs regularly for more than one minute, it will zero the counter of overcurrent. However, if EG8010 does not function regularly after five 16-second cycle, it will complete turn off the output of SPWM unit. It needs a hard reset to start again. If in some scenarios the starting current is relatively high and it takes longer timeto start, which overcurrent protection is not suitable, Pin IFB can beconnected to the ground."


See the top of page 2

"I got the razor blade out and removed the 393... shorted pins 7 to 8 and then made a jumper from 1 to 4.
This gets the inhibit pins of both the drivers and the main chip to turn off (/ or on depending how you want to  say it I guess) ... unequivocally.... ie they no longer get to inhibit anymore.
Then use the current IFB input as designed. It then behaves with no problems.
I cant understand why they used the 393 in the first place, unless the IFB signal from their resistive sense was too small, but they needed to get the timing correct so that the IFB pin on the main ship got the message first, but that is not the case. They decided to inhibit in three places at the same time..... and failed miserably. Not noticed with EI transformers ( but for odd noises), but lethal for torroids..... now it is fine, and I can use the current o/load in the chip to do the stop... test.... stop ... test etc, then turn off needing hard start."

A very simple solution




Bridge, Thank you for sharing your design  . I think that while we are separated by many kilometres we are close through design; making a simple tough Inverter for all  - this is the goal    [smiley=thumbsup.gif] . RF

OK RFBurns,
we have this passion that unites us and that's is nice.-
A question:
Your nick-name is RF=RadioFrequency??.- You are OM or Radioamateur?.-

Yes RF=Radio Frequency I am a radio amateur (not so active on H.F any more)

RFBurns :
Yes RF=Radio Frequency I am a radio amateur (not so active on H.F any more)
                   

I'm happy.-
Look here:
http://qrz.com/db/I6KMP
Are only active in HF.
73

Bridge :
RFBurns :
Yes RF=Radio Frequency I am a radio amateur (not so active on H.F any more)
                   

I'm happy.-
Look here:
http://qrz.com/db/I6KMP
Are only active in HF.
73

fantastic
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