Re: (ET) E16 drive issues.

Thanx a lot. So they are both the same?

Regards

Dean Stuckmann

From: "RJ Kanary" <rjkanary consolidated net>
To: "Dean Stuckmann" <dstuckmann mantool com>, "elec >> et" <Elec-trak cosmos phy tufts edu>
Sent: Thursday, October 2, 2014 8:58:01 AM
Subject: Re: Fwd: (ET) E16 drive issues.

Yes, that WAS a diode. <VBG>Now that the primary issue is
unveiled,a local RadioShack® should have suitable, better than OEM
replacements.Here is a link to the OEM specs.

http://pdf1.alldatasheet.com/datasheet-pdf/view/76231/MICROSEMI/30S10.html

Replace both of them, of course. :)

On 10/2/2014 8:49 AM, Dean Stuckmann wrote:
> Here is a photo.
>
> Regards
>
> Dean Stuckmann
> ------------------------------------------------------------------------
> *From: *"Dean Stuckmann" <dstuck lakefield net>
> *To: *"Dean Stuckmann DStuckmann" <DStuckmann mantool com>
> *Sent: *Thursday, October 2, 2014 6:12:32 AM
> *Subject: *Fwd: (ET) E16 drive issues.
>
>
>
> Begin forwarded message:
>
> *From: *RJ Kanary <rjkanary consolidated net
> <mailto:rjkanary consolidated net>>
> *Subject: **Re: (ET) E16 drive issues.*
> *Date: *October 1, 2014 at 8:10:15 PM CDT
> *To: *Dean Stuckmann <dstuck lakefield net
> <mailto:dstuck lakefield net>>, "Ele >> et"
> <Elec-trak cosmos phy tufts edu
> <mailto:Elec-trak cosmos phy tufts edu>>
>
> An image would be helpful. :) I suspect the failed
> component is one of the field diodes.
>
> RJ
>
> On 10/1/2014 9:06 PM, Dean Stuckmann wrote:
>
> Hi,
> Well its not the motor or the F relay, but I did find a
> resistor broke in half on the small square varistor card.
> Could that be it? Does anyone know the values of the
> components on that card? The one that is broke is smoked and I
> can’t see a number.
>
> Thanx for your help
> Dean
>
>
> On Sep 22, 2014, at 9:10 PM, RJ Kanary
> <rjkanary consolidated net <mailto:rjkanary consolidated net>>
> wrote:
>
> Since this is an E-16 there is no longer a
> Field Reversing relay. The only relay in the Field circuit
> on these is the Field Weakening relay. With the Armature
> reversing contactors, the Field circuit became much simpler.
>
> RJ
>
>
> On 9/22/2014 9:14 PM, CZ Unit wrote:
>
> On 9/22/2014 9:01 PM, Dean Stuckmann wrote:
>
> Hi,
> Thanx for the help.
>
> Here is some more info. I did the motor testing
> with the motor just on the ground. So there was NO
> resistance from belts or the transmission. Could
> that cause the runaway? But like I said it worked
> fine in reverse. In reverse the torque made the
> motor jump as it got up to speed almost
> immediately. In forward, the motor started at just
> a few RPM for the first few seconds but then
> started revving up to runaway after about 5 more
> seconds.
>
> The problem is there is no power to the field when in
> forward. If the E16 uses the E15 type of field control
> there is a relay that is probably welded shut in the
> reverse position. Thus when you try to go to forward
> there is no field. If it's an E20 type controller then
> there are two diodes that provide constant power to
> the field in forward and reverse. One of them blew up.
>
> The E15/20 motor is not really a shunt motor, it's a
> compound motor. There is a shunt field that supplies
> almost all the power, and a small field in series with
> the armature that acts as a compensating control,
> increasing field strength past normal full field when
> the motor is heavily loaded. With the normal field
> gone that little remaining field winding will provide
> enough to spin the motor very quickly with no load and
> not at all under any load.
>
> C
>
>
>
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