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Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 12:05pm 05 Mar 2018
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Originally they were 13V Zeners in the power supply but changed to 18V maybe 1 year ago.There are only 10 types of people in the world: those who understand binary, and those who don't.
nickskethisniks Guru Joined: 17/10/2017 Location: BelgiumPosts: 458
Posted: 01:17pm 05 Mar 2018
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Is the IR 2010PBF gate driver a good alternative for the IR2110PBF? It could supply 3A.
Clockmanfr Guru Joined: 23/10/2015 Location: FrancePosts: 429
Posted: 02:25pm 05 Mar 2018
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A good 2110 requires 10v to 20v, 15v is spot on.
12v should be okay coming from that TIP35c with a 13v zenner.
Other 12v supplies required, like the cooling circuit, then a 48v to 12v separate supply is recommended.Everything is possible, just give me time.
3 HughP's 3.7m Wind T's (14 years). 5kW PV on 3 Trackers, (10 yrs). 21kW PV AC coupled SH GTI's. OzInverter created Grid. 1300ah 48v.
tinyt Guru Joined: 12/11/2017 Location: United StatesPosts: 438
Posted: 02:26pm 05 Mar 2018
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In my opinion, I think it is. On a 48v system, we don't need the 600v rated IR2110.
I will add it to the experimental inverter I am still designing. Thanks for the info.
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 08:58pm 05 Mar 2018
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the ir2010 appears to be directly compatible and the 200V maximum is more than enough, the MOSFETs are rated at 80V.There are only 10 types of people in the world: those who understand binary, and those who don't.
renewableMark Guru Joined: 09/12/2017 Location: AustraliaPosts: 1678
Posted: 09:13pm 05 Mar 2018
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How much can that ribbon cable handle?Cheers Caveman Mark Off grid eastern Melb
noneyabussiness Guru Joined: 31/07/2017 Location: AustraliaPosts: 513
Posted: 07:01pm 06 Mar 2018
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Its only for microseconds so surprisingly alot... I think it works !!
renewableMark Guru Joined: 09/12/2017 Location: AustraliaPosts: 1678
Posted: 05:55am 07 Mar 2018
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That chip gets powered by the AC/DC transformer right? If that is a 3W 12V then it's only putting out .25A, or am I missing something?
Edit, basically what I'm getting at is there any point getting chips that can output a higher amp when all you are feeding the system is 1/4 AEdited by renewableMark 2018-03-08Cheers Caveman Mark Off grid eastern Melb
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 06:31am 07 Mar 2018
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The transformer is there to sense the AC voltage so it can be regulated, the transformer has nothing to do with supplying power to the circuit. 3W transformer is 3W, power supply is from the 48V input to the PCB.There are only 10 types of people in the world: those who understand binary, and those who don't.
renewableMark Guru Joined: 09/12/2017 Location: AustraliaPosts: 1678
Posted: 06:45am 07 Mar 2018
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Ahhh so the control board is powered by the power board via the ribbon cable, and the control board send the signals back to power board to control fets?Cheers Caveman Mark Off grid eastern Melb
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 06:56am 07 Mar 2018
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The ribbon cable has 2 pins for ground at one end and the same at the other end for 48VDC+ the 2 pins right in the middle are used to drive the charge pumps to drive the high side (positive heatsink) MOSFETs. Google charge pump and MOSFET if you want to learn more.
The remaining 4 pins drive the MOSFET gates.
Inputs to the control board are 48VDC power supply, 230 VAC for voltage feedback, temperature sensor and the current feedback input. Only other connections are for the on-off switch and LEDs for your front panel. Edited by Madness 2018-03-08There are only 10 types of people in the world: those who understand binary, and those who don't.
johnmc Senior Member Joined: 21/01/2011 Location: AustraliaPosts: 282
Posted: 07:06am 07 Mar 2018
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How much can that ribbon cable handle?
Depends on the supplier Chinese ribbon wire is 30 AWG (I measured the wire) 0.5 amps continuous , fuses at 10 amps Most ribbon cable is 28 AWG 0.8 amps continuous ,fuses at 14 amps The duty cycle for the inverter would be a lot less than 100%
The above specs from wire gauge tables.
Can buy 26 AWG ribbon but not so readily available for IDC Terminals.
john
johnmc
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 07:11am 07 Mar 2018
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I soldered in heavier wire during my attempts to get my Inverter working, I found made it no difference to the chinese ready made cables I had.There are only 10 types of people in the world: those who understand binary, and those who don't.
renewableMark Guru Joined: 09/12/2017 Location: AustraliaPosts: 1678
Posted: 07:24am 07 Mar 2018
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Thanks, just looking at possibilities. Edit, bloody read my mind, the connector was going to be my next question. Anyway I'll just plug on and see how mine goes. It's worrying how very capable cluey fellas have problems though.Edited by renewableMark 2018-03-08Cheers Caveman Mark Off grid eastern Melb
johnmc Senior Member Joined: 21/01/2011 Location: AustraliaPosts: 282
Posted: 03:53am 11 Mar 2018
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Good day all Maybe some one has had the same problem.
Can not stop the EG8010 control chip, flashing 3 times for over voltage the voltage at terminal 13 VFB can be adjusted between 2.5 volts to 3.3 volts, with no affect. The over temp feed back is 2.2v wich is below the 4v cutoff and the current feed back is 0v as per specs.
I have set the VFB to 2.9 to 3v before and this usually stops the over voltage flashing
The chip on restart produces the basically square wave for 8 to 20 seconds then starts the flashing cycle. The control voltage 5.12v , no 2110 driver chips fitted . Only the basic control board used with 48vdc and 240v ac supplied to the VFB transformer . In the last week, I have tried 3 different control boards and 3 different EG8010 chips always the same results.
cheers john
johnmc
johnmc Senior Member Joined: 21/01/2011 Location: AustraliaPosts: 282
Posted: 05:25am 11 Mar 2018
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Update EG8010 works perfectly if a pure 3v dc source is used for feedback to VFB
cheers johnjohnmc
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 05:30am 11 Mar 2018
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I have seen the square wave output myself, this was while I had 12 VDC connected to the VFB at the transformer output. The reason I was doing this was to test MOSFET boards, it would run if I adjusted it sufficiently, You may need more resistance, I have never got it running with 240VAC input to the transformer (except from the inverters own AC output). I did try but changed to the supplying DC.
The EG8010 likes to see the AC voltage increase gradually with soft start but I did get it running with 12VDC by winding the pot back.There are only 10 types of people in the world: those who understand binary, and those who don't.
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 05:41am 11 Mar 2018
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I was typing while you sent that post.
John with the capacitors removed from the MOSFET PCB and series resistance like you used earlier you can run the entire inverter with no risk of it blowing up. This gives you the chance to look at all the waveforms, if something is wrong the Toroid will start making horrible noises. While running like this with no load you don't even need heatsinks on the MOSFETs if it is running correctly. The output may be slightly distorted towards a triangular shape.
I would try it with 12 or 16 MOSFETS and see how it goes then, I did that in the past and everything was fine. With 20 or 24 MOSFETs I got nasty spikes in the AC output, have not seen that since I changed to using the TOTEM pole drivers.
Edited by Madness 2018-03-12There are only 10 types of people in the world: those who understand binary, and those who don't.
johnmc Senior Member Joined: 21/01/2011 Location: AustraliaPosts: 282
Posted: 07:17am 11 Mar 2018
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Good day Gary, Thanks for the replies, will try as you suggested but will have visitors for the next few days, so not much if anything will be done in the shed. The 4 kw inverter died 5 days ago with very little load ,less than 500w , the house is running on town supply. cheers johnjohnmc
johnmc Senior Member Joined: 21/01/2011 Location: AustraliaPosts: 282
Posted: 01:54pm 14 Apr 2018
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Good Day All Still no inverter but i have managed to destroy over 100 HY4008 50 odd ir2010 20 odd EG8010 and numerous PCB boards the last effort of a soldered in place FETS and cpacitors So power board number 3 has screwed replacement of Fets and power capacitors The inveter will create a sinewave with a standing current of 1 amp (50w)but this is with restricted battery supply. when the inverter has the main battery bank 1000 amp hr at 48 volts supplied even with a small load of 500 watts this will blow the power fets . The fet driver voltage is 17 volts there is no noise from the transformer . The following wave forms are taken at the power board high side fet gates but no fets fitted to the power board highsde Fet fitted low side and with fet fitted With out the fets the low side wave is nice and square. Cheers john
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
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town supply.
