Re: update, results Hot rodding a SepEx golf cart motor

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Re: update, results Hot rodding a SepEx golf cart motor

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          Hi Dan, Lee, David and All,              I took all the ideas and made a sepex controller which was kind of jerky but that is likely because it isn't loaded and should work once linkage is worked out.  I'll likely use it on a moped cabin trike since I have the title, VIN, etc.              While looking at the Sepex and my other series motor transaxle I wondered whether the armature  was the same?   So I popped it apart and then it slide right in the series field, transaxle!!!   ;^)              Of course would it run?  I hooked it up and ran excellently.               So looking to put that in my next EWoody, an aerocabin trike I just cut first wood today.  I hope to have it on the road if not finished by 2-15-18 so I can get ride of my Van.               Sadly I was also able to check the gear reduction which is 12-1 which means 45mph is all one can get from it as hitting around 7k rpm.                Good thing is the male spline shaft coming out the  transaxle seems to have a good bearing  so may be able to put a sprocket on it to mount a more powerful motor off the axle lowering unsprung weight along with correcting the reduction gearing down to 8-1. .            I was stretching 2.2hp GC motors way past, 4x  their limits  though they took it in stride with few failures from 15-40 yr old motors when I got them.            And I need an EV that can go 250 miles to Miami, etc to pickup solar panels so I need more power than one can expect from a stock GC motor.  I have my old EWoody from a CitCar motor, 50 yrs old now chain driving a GC transaxle seems to be the present choice.           I can put it in my new one but likely sell that instead and build another one as they get easier as I build more.  Now I can put much more powerful motors in them really opens up new apps, long distance lithium battery EVs.           Thanks,                Jerry Dycus 
  

      From: Dan Baker via EV <[hidden email]>
 To: Electric Vehicle Discussion List <[hidden email]>
Cc: Dan Baker <[hidden email]>
 Sent: Sunday, December 31, 2017 2:24 PM
 Subject: Re: [EVDL] Hot rodding a SepEx golf cart motor
 
Hey Jerry

I would give Carl over at Evdrives a call, he should be able to recommend
something cost effective.  I have a couple 96 ezgos that I fixed one up for
my pig.  Originally one came with an aftermarket 36/48 Alltrax controller
which was running at 36v.  I replaced the dead batteries with a 48v pack,
motor had no issues running at that voltage but the used controller failed
within a couple months.  I replaced it with an Alltrax series controller
and D&D motor.  Shunt controllers are usually more expensive then series
controllers.  The EZGO TXT I have has a Spicer diff as well, not sure of
the exact ratios, you can get high speed gear sets but they are pricey
IMO.  The bolt pattern on my spicer axles is 4 x100 so larger rims from an
ATV or Civic would also give you more distance per turn.  Watch how much
load you put on those sealed motors, most are Iron cased and dissipate heat
poorly.  I have a thermostat and fan on mine now.

Cheers
Dan

On Sun, Dec 31, 2017 at 9:53 AM, jerry freedomev via EV <[hidden email]>
wrote:

>
>  Hi All,    I'm building some lightweight subcar EVs to demonstrate them
> as low cost transport plus I need long range EV transport until I get my 63
> Vette looking EV  done and to get rid of my costly and FF van.      Just
> picked up 2 Ez-Go GCs for scrap but not checking they turned out to have
> 36vdc ADC sep/ex motors transverse on Spicer transaxles.  My question is
> how best to make them work at 5500-6k rpm on 48vdc Volt modules?      My
> thinking is a starting resistor and I have a variable 20 amp, 80vdc DC
> power supply to start up.    First hitting the first the power
> supply/field full on and then the start solenoid , then short out the
> resistor and then reduce the field to increase speed.      Other
> suggestions like anyone doing it with Kelly controllers, etc as long as not
> too costly.  But I hear they need to be matched as other electronic ones
> do.      Anyone know the gear ratio on these Spicer transaxles, 1983??
>          Thanks,                    Jerry Dycus
>
>
>
>
>
>
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