Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 07:31 28 Nov 2024 Privacy Policy
Jump to

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.

Forum Index : Electronics : Time to start inverter mk 3

Author Message
poida

Guru

Joined: 02/02/2017
Location: Australia
Posts: 1419
Posted: 11:29am 11 Sep 2018
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

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
Copy link to clipboard 
Print this post

There cheaper by the hundred!
There are only 10 types of people in the world: those who understand binary, and those who don't.
 
Print this page


To reply to this topic, you need to log in.

© JAQ Software 2024