DIY Electric Car Forums banner

1 - 1 of 1 Posts

·
Registered
Joined
·
70 Posts
Discussion Starter #1
Re: [EVDL] Ranger Conversion Amps & Warm Motor Okay?

Hello Dave,

You may not have a high enough overall gear ratio. I am pulling a 7000 lbs
EV and in 1st gear to 25 mph at 6000 rpm at a overall ratio of 19.5:1 and
2nd gear to 45 mph at 6000 rpm which is a 13.5:1 overall gear ratio in 2nd
gear.

It is best to keep the rpm up as high as possible.

I can keep it at 200 amps either in 1st or in 2nd gear. Also I am using a 6
inch Dayton 6 inch 150 cfm blower that attaches to the brush covers. Use a
6 inch carb filter housing attach to the input air on the fan. This is with
a Warp 9 motor.

I run the fan all the time, no matter what the ambient temperature is. I
have a Stewart Warner temperature sensor on the the motor which have never
went above the ambient air temperature. It is best to connected the
temperature thermo switches to a on dash 12 vdc LED to warn you of the high
temperature.

If the temperature warning lights come on, then let up on the accelerator,
and leave the blower fan running to cool down your motor.

Roland


----- Original Message -----
From: "Dave Oliveria" <[email protected]>
To: <[email protected]>
Sent: Tuesday, September 18, 2007 7:07 PM
Subject: [EVDL] Ranger Conversion Amps & Warm Motor Okay?


> 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
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
 
1 - 1 of 1 Posts
Top