Dan Baker via EV wrote:
Does anyone know of a Ammeter kit that could read from 3 different shunts?
I would like to have one at the blower, the drive motor and total coming
off where the two battery packs meet. I guess I could get away with two if
there was something that could measure both motor
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> -Original Message
2/28/2015 8:49 AM
To: ev@lists.evdl.org
Subject: Re: [EVDL] Help! - Double motor failure!
Hi Dan,
The only way I can think to do this is to build it yourself with an
Arduino or something similar.
This would involve an Arduino board, an ADC shield, and a LCD display.
I've got something
For situations like this, I've used edgewise panel meters. Typically
they're 1" to 2" wide, and only 1/2" high. You should be able to stack 3 in
the space otherwise taken up by one square panel meter, and have one meter
for each shunt.
David Roden - Akron, Ohio, USA
EVDL Administrator
= = =
Hi Dan,
The only way I can think to do this is to build it yourself with an
Arduino or something similar.
This would involve an Arduino board, an ADC shield, and a LCD display.
I've got something similar that I used for testing my conversion.
Feel free to contact me offline if you are inte
Does anyone know of a Ammeter kit that could read from 3 different shunts?
I would like to have one at the blower, the drive motor and total coming
off where the two battery packs meet. I guess I could get away with two if
there was something that could measure both motor shunts simultaneously? If
On Sat, Feb 21, 2015 at 7:13 PM, EVDL Administrator via EV
wrote:
>
> Will a CA handle that kind of current? I thought it was for e-bike level
> currents. Or can you put a bigger shunt on it, maybe a 10x or 100x?
There are different versions of the CA. He just needs the one which
uses an extern
Hey everyone
Thanks again for all your wisdom and help around my issue. We didn't get
any snow last night, just rain so not a lot to test with before I took off
for the airport. As mentioned I'm not feeling any binds in the drive
train and the only thing I can't rule put is a bind that could occ
This leads me to think that there is a new problem with
the drive function, creating a large amount of drag.
That was my thought too. But he says he can't find anything binding in the
shop.
What if the original motor's brush advance was set correctly, but the
new motors are not?
A quick t
While I agree that the use of an ammeter could be useful, it is difficult
to see the difference between now and what the draw was before the problems
surfaced. What is the connection to the mechanical drive? Did something
shift out of alignment? Is there a mechanical brake that has somehow become
c
On 22 Feb 2015 at 7:41, Thos True via EV wrote:
> This leads me to think that there is a new problem with
> the drive function, creating a large amount of drag.
That was my thought too. But he says he can't find anything binding in the
shop. I wonder if snow or ice is somehow getting into a dr
Perhaps we should go back to the basics here...Dan tells us that everything
worked fine for 2 years (seasons), then he burned up 2 motors, the 2nd one
almost immediately. This leads me to think that there is a new problem with
the drive function, creating a large amount of drag. I would be looking
On 21 Feb 2015 at 21:09, Dan Baker via EV wrote:
> I still have some to do's like getting some thermal monitoring
> in place for both motors and some ammeter monitoring like a Cycle Analyst.
Will a CA handle that kind of current? I thought it was for e-bike level
currents. Or can you put a big
graingers.
Dennis Berube
Still with the QUICKEST and fastest drag racing motors
Sent from AOL Mobile Mail
-Original Message-
From: Dan Baker via EV
To: Bill Dube ; Electric Vehicle Discussion List
Sent: Sun, Feb 22, 2015 08:09 AM
Subject: Re: [EVDL] Help! - Double motor failure
Hey everyone, thanks for all the suggestions and help. David, I verified
the drivetrain doesn't have any binds by jacking rear of the cart up and I
was able to spin the motor input spline by hand. I was also able to move
the cart freely around the garage. I was able to recover two brush springs
Yes, a week continuous. If time permits, two weeks.
On "forklift" style DC motors, the brushes will last for many, many
years of operation. When run on ~12 volts at zero load for a week, you
just start to get an a hint of curvature in a square-faced brush. Best
to "pre-shape" the brushes with a
Bill wrote -
> Also, you really need to break in a motor under light load for quite some time
> before giving it maximum amps. I spin the motors using ~12 volts for about a
week
> to break in the brushes.
Is that a week continuous?
Rush
Tucson AZ
___
Using the motor to "hold" a vehicle motionless on a hill (or against
some immobile load) is a sure way to roast the brushes and the
commutator. A DC motor needs to spin, just a bit, to distribute the load
evenly around the commutator bars and armature windings.
Also, you really need to break i
On 21 Feb 2015 at 11:56, Dan Baker via EV wrote:
> I used to check it regularly with my hand for
> temps, barely would get hot. Now the "H" rated insulation is melting!
I'm not a motor expert, but I think the most usual causes for overheating
where there was none before would be
1. Overloading
Thanks Jerry and Zeke
The D&D motor I purchased (now twice) was built for low speed torque
applications,40% more torque than a stock motor. Mike has advised me they
have customers that use these on carts to pull large boats out of launches,
etc. It's massively powerful for a golf cart. It is a
Do you have any metering of motor current? I'm not familiar with how the
AXE controller works with a shunt motor as I've only used them with series
motors, but I imagine that if you are at low throttle, the motor current
could actually be very high, while the battery current is low.
On Sat, Feb 2
little with 50% high speed doable. But not needed
or wanted in your app. Jerry Dycus
From: Dan Baker via EV
To: Electric Vehicle Discussion List
Sent: Saturday, February 21, 2015 9:36 AM
Subject: [EVDL] Help! - Double motor failure!
Hey folks
I'm hop
Hey folks
I'm hoping someone can help me with my EV. My snowpig (
http://www.evalbum.com/4544 ) has suffered two drive motor failures in the
past two weeks! I purchased a D&D 170-04-01 8hp torque motor two years ago
to beef up my cart that I use to clear our dirt road for myself and
our neighbor
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