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Today's Topics:

   1. Re: High voltage leakage/shorting question (Gerald Wagner)
   2. Re: EVDL posting questions ([EMAIL PROTECTED])


Message: 1
Date: Sun, 26 Aug 2007 13:33:30 -0500
From: "Gerald Wagner" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] High voltage leakage/shorting question
To: "Electric Vehicle Discussion List" <>
Content-Type: text/plain; charset=ISO-8859-1

Hi John,  I have another concern with mounting the batteries on the same
frame as the motor.  I prefer to mount the batteries directly to the truck
frame, because the  rubber engine mounts will allow the electric motor to
torque every time you start.  This movement will be transmitted to the
batteries.  As I read your original question, the air gap will not change
due this movement but the batteries will be moving all the time. I am not a
battery guy but I don't like the idea of the batteries being subjected to
the drive line movements.

So I would re-mount the batteries with a separate frame, and at the same
time increase the air gap between the batteries and the motor terminal.

That's my 2 volts worth,   Jerry Wagner

On 8/26/07, Bob Bath <[EMAIL PROTECTED]> wrote:
> > I have my motor (ADC 9 inch) hanging from a
> > crossbrace that attaches
> > to the original engine mounts. I also rigged up a
> > battery rack
> > holding 3 batteries that sits on top of this cross
> > brace. The other
> > day I noticed that there is only a 3/16 inch gap
> > between the battery
> > rack (3/8 inch angle iron) and the A2 post of the
> > motor.
> >
> > Even with my lack of knowledge about things
> > electrical, it seems that
> > the battery rack touching the motor terminal would
> > not be a good
> > thing (either electrically or physical damage to the
> > motor terminal).
> >
> > My attempts to push the battery rack closer to the
> > motor terminal are
> > not successful but I suspect the forces of breaking
> > may be great
> > enough to cause the battery rack to touch or come
> > closer to the motor
> > terminal.
> >
> > Am I correct that it is bad/dangerous for the
> > battery rack to contact
> > the motor terminal?
> Yes.  The vehicle chassis is effectively "ground", and
> runs your aux. system, as it was in its gas burning
> days.  The high voltage pack is "floating".  As you
> drive, it is likely that your transmission will move.
> Whether it goes 1/8, or 3/16" is yet to be determined.
> Hard rubber will isolate, provided it is durable, and
> inspected often, and that you can get it to stay on.
> I don't see forces involved in braking as the issue.
> As far as electricity arcing through the air, it can
> happen, but there are other issues: is electrolyte all
> over your battery tops?  Where are the EMFs in your
> electric motor?  And probably a host of others that
> I'm missing as a novice.
> >
> > If they don't  touch how close is too close?
> >
> > My system is 144v flooded pack with a zilla 1k
> > controller.
> >
> > Thanks in advance.
> >
> > John in Western Ma
> >
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Message: 2
Date: Sun, 26 Aug 2007 11:40:18 -0700
Subject: Re: [EVDL] EVDL posting questions
Content-Type: text/plain;       charset=ISO-8859-1;     DelSp="Yes";

<<<< Another question is; it takes forever for mail to arrive back whenever
I start a new topic. When replying it seems normal.

For instance; I emailed a message last night and it still has not arrived????

Is there something I am doing wrong?

I wonder how long it will take this message to arrive...>>>>

Between hitting 'send' and seeing my latest post in the archives took  
less than 5 seconds, so the 'mailman' system is working pretty fast  
internally. I only read email online (keeps down mail traffic), so  
it's possible to see posts before they even end up in listees' inboxes.


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End of EV Digest, Vol 1, Issue 76

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