I've got no ideas about your DC to DC, but this is why I always recommend
the 6.7 inch series wound motors over Eteks. It's not that they can't do
the job, but they are too easy to fry. Too many amps either undoes all the
solder or demagnatizes the magnets. Yes they are small, and yes they are
efficient, but the lack of thermal mass is a big part of the reason why they
are easily destroyed.
damon
From: Mike <[EMAIL PROTECTED]>
Reply-To: ElectricMotorcycles <[email protected]>
To: ElectricMotorcycles <[email protected]>
Subject: [ElectricMotorcycles] Throw another Etek on the barbie
Date: Tue, 17 Jul 2007 21:19:51 -0400
Stick a fork in it. I think it's done.
It was pretty spectacular and very, very smelly. I'd would have thought
they used blue smoke in it like other electrical stuff but it was dark
gray. How they get that much smoke into something so small is beyond me.
Too many amps for too long is my initial diagnoses. It got too hot and the
non-twerly bits that where soldered to the twerly bits got unsoldered.
This turned them into little shards of hot bits falling onto the roadway.
Apparently spinning something at high rpm with high temps is just as good
at desoldering as braid. I need to spend more time at the autopsy table
because the wire to the dc/dc converter is really what caused most of the
smoke it turns out.
That wire went from the main pack to the dc/dc to the system ground as it
came out of the dc/dc. It's all toast. Every single millimeter of the wire
burned off its insulation. I came around a turn and really hammered the
throttle and the motor went. As I looked down I saw the dash light up like
a christmas tree. So it looks like the motor died and in someway that
killed the dc/dc?
Anyone care to explain to me your theories of what happened?
I'm not sure if I blew anything else up yet. Let's hope the controller and
em dash are okay.
Pictures:
http://electricmotorcycles.net/modules/xcgal/thumbnails.php?album=1
Mike
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