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Forum Index : Electronics : Bryan's Inverter build

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tinyt
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Joined: 12/11/2017
Location: United States
Posts: 542

Posted: 03:56am 12 Mar 2026

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Bryan1 said

tinyt said

Bryan1 said Well got the first glimpse of the energy meter for a few seconds

so took the toroid output off the AC board and connected my DMM where I got to see 25 volts AC then this ticking was heard from the inverter box.

So looks like new mosfets are going in

I suggest you scope all signals again to make sure none of the TIPs are damaged.

That was good idea mate as the H02 TIP's are showing zero voltage on all pins, now the other 3 legs are showing the correct waveforms.

IR2184 could possibly be damaged also. Check also the 20 ohm resistor.
When you dremel'ed the shorted copper, I hope you left some copper, check for existing continuity between C8+ and Q32 middle pin.
Edited 2026-03-12 14:01 by tinyt

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1777

Posted: 06:50am 12 Mar 2026

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I ohm'd all those tracks and they all have continuity and replaced the H02 TIP chips set it all up again and back to a dead short now looks like I'm glad I got double the amount of TIP chips as they are all getting replaced in the morning as thats enough for one day.

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1777

Posted: 08:00am 12 Mar 2026

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Ok I have to own up with that hack I did of putting in the jumper wire silly me soldered it to L01

So basically in the morning all the TIP chips will be replaced so I can get back to scoping the result and new mosfets will be installed as I do have 55 of those HY5608 mosfets and I should of put new ones in to start with.

Now I do have a blank power board I have been using as a reference and using my 45X microscope the C8 track is totally clear of the short circuit.

As the current power board does have 50sqmm for VS1 and VS2 and 65sqmm for the Vbat connection any and all hacks will be used to get this board going.

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