On Thu, Jun 05, 2003 at 03:04:21PM -0800, Friedel Bruening enlightened
us thusly
> More likely IGBT's, but what does the package look like, how many pins
> on the drive side, what does the drive circuit look like, are there
> any 8-pin-opto's, they are usally white. Anyhow, replace IGBT's isn't
> that simple, specially when they are big, you may have have to adjust
> software, you probably won't have access to it.
The package: Start with a module like a double scr with 4 tiny pins at
one end. These modules are wider, and lower than your average scr pack.
They are black, very square - a plastic reminiscent of bakelite. The
three screw terminals are C1, E2, and E1/C2. The 4 tiny spades are B1,
E1, B2, E2. I am convinced it is not an igbt (see my other post).
I never bothered with the drive circuit - there are modules that stand
up they are sealed. If one of those is gone, I can forget it. This unit
had coolant in which blew away the mains side. The rest seems OK.
>
> There aren't to much makers of IGBT's you might find out this way. I
> have repaired quite a few inverter's, from small to big. From my
> experience I can tell you, if the output module is blown, forget it,
> but it's a good source of bit's and pieces.
The success rate and the economy of a repair varies once power modules
are gone. I have fixed a few in my time.
>
> Friedel
>
>
> At 06:24 a.m. 05/06/03 -0800, you wrote:
> >I stuck my nose into a drive from a (Japanese?) Milling Machine, and
> >came out holding a dud transistor module. The Markings are
> >
> >P 50 Z No: 1604
> >
> >They all say No: 1604. The label shows a darlington class B stage
> >made with NPN Bipolar transistors, and with reverse diodes
> >incorporated. It runs from a DC bus. Absolutely no manufacturer's
> >markings or logo, and I smell a spacial part here. It's three phase
> >~200V phase to phase, so the most believable guess at the '1604' bit
> >would be 160Amps/400Volts
> >
> >Can anyone throw me a bone with this one?
> >
--
With best Regards,
Declan Moriarty.
--
Author: Declan. Moriarty
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