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Re: [EVDL] Ranger Conversion Amps & Warm Motor Okay?


Thanks for your replies. To answer your questions:
- my amp shunt is on the battery side (24 x 6v = 144v system of Interstate 2200's; T105 equiv).
- I've checked all battery connections immediately after driving and all are still cool to the touch
- Motor cables from the controller are the only warm ones
- All traction battery cabling is 2/0 with soldered connections

- motor isn't scalding hot so probably okay (ADC motor drawing says sensor closes at 120C)
- I'll connect the sensor up to something to light up remotely in the cab

- I don't have a tach connected yet so have not been going high in RPMs
- my DCP controller takes a tach input and output can go to my instrument cluster
- I'm currently trying to locate a 2 pulse/rev tach sensor to connect up
- good to know that higher RPM (but less then 6,000) is better



----- Original Message ----
From: Bob Bath <[email protected]>
To: Electric Vehicle Discussion List <[email protected]>
Sent: Wednesday, September 19, 2007 12:09:40 AM
Subject: Re: [EVDL] Ranger Conversion Amps & Warm Motor Okay?

Dave, I'm afraid I'm missing a couple of vital pieces.
a) If you are pulling that many battery amps from
floodies, not good.
If you are talking controller amps to the motor,
you're going to be okay, especially if you're talking
about the 400-450 from a dead stop only, and not
The other thing is that the motors are made to really
heat up to the touch. They have insulation, and are
built to specs such that they can handle it.
Obviously, you haven't given us _specific_ temps, but
you never described it as "burning hot omigosh, OUCH!"
so I'm going to say it sounds like mine, which is 3200
lbs., and 8" armature.

--- Dave Oliveria <[email protected]> wrote:

> Good EVening, EVeryone;
> I have two questions about what's typical in amp
> draw and a warm motor when I drive. I just got my
> Ranger EV conversion to run two Mondays ago. Since
> then I've been taking several runs including longer
> drives to determine range.
> Q1 - I'm noticing that I seem to consistently draw
> from 200 to 450 amps in each gear (2nd, 3rd, 4th) to
> get up to speed and in climbing hills (and sometimes
> I'm still not going the posted speed limit). I
> appear to maintain 50mph at 100amps. Is this
> normal?
> Q2 - My 9" ADC motor smells like it's warming up the
> windings after each trip. I've felt for temp and
> it's been warm. Today it was down right hot to the
> touch after a 8-mile trip to town and back. I put a
> meter on the temp switch pigtails after I got home
> to make sure that they weren't closed (indicating a
> high-temp condition). Is this high temp thing
> normal?
> Thanks for your guidance in advance!
> Dave "Still EV Grinning" O
> _______________________________________________
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