Re: (ET) E-20 Rebuild w/Electronic Controller Kit

["David Roden" <etpost drmm net>]

Hi John,

The Electric Tractor Store seems to be a very part-time activity for Jim.  
Keep trying and eventually he'll respond.  It may take days or weeks.

Jim offers a GE controller.  IIRC it's a bit on the pricey side but looks 
to be a solid choice.  I don't know of anything other than Jim's package 
that's closer to being an actual ET controller kit.

Other controllers will probably be cheaper, but will require some 
moderately significant electrical / electronic chops to adapt and install.

Alltrax once made a controller designed for the ET.  It worked very well.  
They discontinued it in 2018 when they redesigned their controller range.  
They hadn't sold enough of the first model to make a new one worthwhile. 
If 
memory serves, the only reason that they ever made an ET model at all was 
that at the time they had an engineer on the staff who owned an ET.

Several people here have used Curtis golf car controllers, apparently with 
success.  Some electrical design work is required.

Probably an Alltrax could also be used.

Any series motor controller is a bit iffy with an ET motor.  The ET motor 
inductance is lower than a series motor controller usually expects, so the 
controller's current limit may not be able to react fast enough.  If you 
use a series motor golf car controller I recommend getting the highest 
current capacity that you can afford.

4QD controllers from the UK are harder to come by than Curtis or even 
Alltrax, but I think might be a better choice.  they're meant for PM 
motors 
but should work fine on an ET sepex motor if you rig up field control.  
Some 4QD models have brake release outputs that can be used to operate a 
field relay. 

I may have a slightly used older 4QD with brake output for sale soon.


David Roden - Akron, Ohio, USA

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