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Forum Index : Electronics : Time to start inverter mk 3

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poida

Guru

Joined: 02/02/2017
Location: Australia
Posts: 1419
Posted: 11:29am 11 Sep 2018
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The story always seems to begin with
".. and it was all going smoothly."

Time for the pictures.



I wonder if the tantalum cap went short then the gate drive IC.
Some EG002 boards have electrolytic caps now. I wonder why.
Cheaper parts? Or better to use caps that fail open...
Dunno.



Both legs of the 50Hz 1/2 bridge blew.

The DC-Dc converter (50V -> 12V) survived, which drives the EG002.

No problems really, the biggest issue is the stink of magic smoke
we enjoyed just as I had finished cooking dinner.
I have a standby unit already in operation.

wronger than a phone book full of wrong phone numbers
 
Tinker

Guru

Joined: 07/11/2007
Location: Australia
Posts: 1904
Posted: 12:03pm 11 Sep 2018
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Welcome to the 'magic smoke' club poida .

One needs at least one event to become a member. Membership is free BTW, well, if one does not count the cost of the blown parts .

I do my testing in the shed - no 'magic' smoked dinners .
Klaus
 
Madness

Guru

Joined: 08/10/2011
Location: Australia
Posts: 2498
Posted: 10:00pm 11 Sep 2018
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I think Poida was eligible to join the magic smoke club long before this.

Tinker I can't help think of that scene from Apocalypse Now and you saying I love the smell of magic smoke in the morning.
There are only 10 types of people in the world: those who understand binary, and those who don't.
 
zaphod

Regular Member

Joined: 03/06/2018
Location: United Kingdom
Posts: 93
Posted: 09:56am 12 Sep 2018
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I always get loads of splinters up my fingernails when this happens scratching my head trying to figure out why and I have never worked it out yet! Just seems power semi's are made to let go every now and then usually when you are confident you have a working circuit and it's been happily working for some while, comiserations!
Cheers Roger
1Kwp DIY PV + Woodburner + Rainwater scavanger :)
 
noneyabussiness
Guru

Joined: 31/07/2017
Location: Australia
Posts: 513
Posted: 09:06pm 12 Sep 2018
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Eay Poida, missed your interesting posts....

Oz referred to those tantalum caps in the past being not suitable for this particular gate drive situation. .in fact he tried just ceramic and said he had problems too.. maybe something in that...
I think it works !!
 
renewableMark

Guru

Joined: 09/12/2017
Location: Australia
Posts: 1678
Posted: 09:27pm 12 Sep 2018
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Poida didn't you get a set of Mad boards, why not build that?
Cheers Caveman Mark
Off grid eastern Melb
 
poida

Guru

Joined: 02/02/2017
Location: Australia
Posts: 1419
Posted: 09:25am 13 Sep 2018
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thanks guys for the support.
Already I have email from aliexpress saying my 50 HY4008 TO-247 are shipped.
More meat for the grinder...
wronger than a phone book full of wrong phone numbers
 
Madness

Guru

Joined: 08/10/2011
Location: Australia
Posts: 2498
Posted: 10:50am 13 Sep 2018
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There cheaper by the hundred!
There are only 10 types of people in the world: those who understand binary, and those who don't.
 
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