Two questions
- can you move (push) the vehicle while in gear (to make sure the motor
is not stuck)
- did you blow the wire when powering the controller or were you
applying 12V directly to the motor?

Note that sometimes something can be thrown up from the street and enter
the motor, possibly causing it to get stuck or short. Unless you have
blower shrouds completely encasing the motor's air inlets.

When applying power to the motor, was this though its power leads and
were they still connected to the controller?
Unless you power the motor at its terminals, there is still the
possibility of the wires being shorted together or the output of the
controller shorting the power you are applying.

I guess that as soon as you take the brush covers off, you will know
more about the internal state of the motor.

I have several times towed my previous EV truck home with a blown
controller. Just a heavy duty piece of Nylon rope that the Home
Improvement store (Orchard Supply was my source) sells by the foot and a
towing vehicle that can be anything - in my case a Toyota Prius - and
going on local streets, staying under 35MPH since the max safe length of
a tow rope makes it impossible to drive faster than that even with the
towed vehicle driver hovering their foot over the brake pedal. I bought
about 25 ft of rope and double-string it (run it though a tow hook or
around a support member on each vehicle) then tie the ends together, so
that the distance between the vehicles is about 10 ft. This to avoid
anybody will try to squeeze in between the two vehicles.

Success!

Cor van de Water 
Chief Scientist 
Proxim Wireless 
  
office +1 408 383 7626                    Skype: cor_van_de_water 
XoIP   +31 87 784 1130                    private: cvandewater.info 

http://www.proxim.com

This email message (including any attachments) contains confidential and
proprietary information of Proxim Wireless Corporation.  If you received
this message in error, please delete it and notify the sender.  Any
unauthorized use, disclosure, distribution, or copying of any part of
this message is prohibited.


-----Original Message-----
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of EVDL
Administrator via EV
Sent: Tuesday, December 27, 2016 2:55 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Shorted FB1-4001A DC motor?

On 27 Dec 2016 at 16:41, Jay Summet via EV wrote:

> I used a 18 ga lamp cord in place of the fuse and tried to spin the 
> motor in neutral.

Try a larger wire.  Remember that 1400+ amp starting surge.  

You might also try "pre-spinning" the motor to reduce the starting
surge.

I wouldn't give up on that motor so easily.  I'm not a motor expert, and

someone should correct me if I'm wrong, but from what I've seen, big EV 
motors seldom if ever fail dead shorted.  

David Roden - Akron, Ohio, USA
EVDL Administrator

= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
EVDL Information: http://www.evdl.org/help/
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
Note: mail sent to "evpost" and "etpost" addresses will not 
reach me.  To send a private message, please obtain my 
email address from the webpage http://www.evdl.org/help/ .
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =


_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Read EVAngel's EV News at http://evdl.org/evln/
Please discuss EV drag racing at NEDRA
(http://groups.yahoo.com/group/NEDRA)

_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Read EVAngel's EV News at http://evdl.org/evln/
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)

Reply via email to