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Re: (ET) motors



Very useful data point. That puts my estimates on the conservative side.

My habit, for good or ill, is to defy my own conservative estimates and push hardware a little past their ratings. So far, so good: it seems hardware ratings themselves tend toward the conservative. That's a choice, though, and caveat emptor.

Our tractors' drive motors are shunt-wound, while CitiCar motors are series-wound. Series-wound are a little easier to control in EV applications... to get to higher top speed with shunt-wounds, you have to have circuitry for field-weakening, and that's marginally more complicated than just hitting the motor with full voltage from the battery pack.

I am experimenting right now with a HUGE shunt-wound motor in a truck conversion... and I'll be figuring out field weakening mechanisms a little later!

-M


On Mon, Dec 6, 2010 at 4:54 PM, William Martin <martinsprinklerdesign yahoo com> wrote:
Just for a comparison...the old Citicars weighed 1250 pounds and had a 3.5 HP motor running 48 V.  They had about a 40 MPH top speed with about a 40 mile range ("about" is with optimal driving conditions).  Hope this helps.
 
Billy


From: Ferguson Apiaries <ferga hay net>
To: elec-trak cosmos phy tufts edu
Sent: Thu, December 2, 2010 2:11:06 PM
Subject: (ET) motors

I was wondering if two of the E 15 motors connected together would drive a small car? 

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