From: "Mr. Sharkey via EV" <[email protected]> > > The controller is just an on-off switch to a PM > > motor; you control speed and direction with the > > 4-speed transmission and v-belt/clutch > >Sorry to disagree with you Lee, but that doesn't describe the >E12/15/20 series of GE Electraks at all. > >The E12's do use PM motors driving a 4 speed Peerless transmission >via V-belt, but the motor control is resistive elements and >contactors. Reverse is accomplished by reversing contactors. No >clutch was used. > >E15 is an upgraded E12, with a compound wound motor using resistive >control and field weakening. V-belts were doubled up. Three >"throttle" positions controlled armature current, then four field >weakening positions. > >E20 Added "cruise control" due to the use of an accelerator pedal >instead of a hand control. Four full field armature steps and four >field weakening.
Interesting! I bought mine used, and though working it was in rough condition. Its motor controller only has a pair of automotive-type "can" contactors and a starting resistor. Maybe it was an early model; or the resistors had failed at some point and were wired out. The "clutch" is just a tensioner pulley moved by the clutch pedal. You start the motor, than slowly release the clutch pedal to start moving. It depends on the belt slipping a little to make smooth starts. Indeed, the steering sector gear on my was greatly worn. It's been a while; but I think the problem in mine was that the pin that holds the sector gear to its shaft was so worn that it allowed excessive play. Drilling out the pin and replacing it with one size bigger tightened it up enough to steer much better. >Note the prices of Electraks have held steady for years. A mowing >deck in operable condition, with little rust is worth almost the >price this tractor is offered at. This tractor is easily worth >$2,500, assuming it runs and mows, probably a lot more these days. Yes. I only have the plow blade for mine. I also have an orange (non-working) E8 (branded and sold by "New Idea"); but it has the mower deck. One of my projects is to see if I can attach the E8 mower deck to the E20. Lee Hart. -- Excellence does not require perfection. -- Henry James -- Lee A. Hart http://www.sunrise-ev.com _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
