Opinions on this motor for this application

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1

I’m building a prototype three wheeled vehicle that weighs around 500 lbs (without batteries) like the one on the mockup revolt-ev.com

I’m looking at this motor for it:
http://www.electricvehiclesusa.com/product_p/mo-es-31b.htm

but I’m not sure if its overkill or if I should go with something smaller like:
http://www.electricvehiclesusa.com/product_p/mo-pmg-132.htm

I’d like to hit 70-75 mph for 50 miles, would I need a transmission or could I direct drive with a sprocket like this?
http://www.electricmotorsport.com/store/ems_ev_parts_sprockets_chains_2.php

2

I plan to use this motor for my street-legal go kart project: http://www.electricmotorsport.com/store/ems_ev_parts_motors_etek-r.php

Along with 5 of these batteries wired in series:
http://www.nationalsolarsupply.com/index.asp?PageAction=VIEWPROD&ProdID=177

I’m also gonna use a CVT (Continuosly Variable Transmission) to improve the end speed of the kart. If you dont know what a CVT is goto YouTube and search “CVT” and you’ll find loads of examples. I plan to use the pully type of CVT.

If you think that this 60 volt, 125 amp setup wont move. Consider that most kiddy karts only use 350 watts max to move ~120lbs about 15mph. My rig will be 21.43 times more powerfull than that kiddy kart. My rig will be light. I plan that the TOTAL weight with one 200lb driver (me) will be about 500lbs.

I cant wait until I get this built!

Joe-

3

I’m building a prototype three wheeled vehicle that weighs around 500 lbs (without batteries) like the one on the mockup revolt-ev.com

I’m looking at this motor for it:
http://www.electricvehiclesusa.com/product_p/mo-es-31b.htm

whats the weight of the vehicle with batteries? Seems like a good match… there’s also the L91, less torque, but higher speed.

but I’m not sure if its overkill or if I should go with something smaller like:
http://www.electricvehiclesusa.com/product_p/mo-pmg-132.htm

if you want to hit 0-60 in 3.2 seconds, i would stick with the X91, or at the very least a K91.

I’d like to hit 70-75 mph for 50 miles, would I need a transmission or could I direct drive with a sprocket like this?
http://www.electricmotorsport.com/store/ems_ev_parts_sprockets_chains_2.php

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thats a tall order with a car that small. 70-75 miles, lets say you cruise at 175 Wh/mile. Lets say you need 50 miles, thats ~9kWh pack. Lets say you want 75mph, and you wanna do a 120V system, that means minimum 75Wh bats. If you want to keep it light, go lithium iron phosphate, otherwise acceleration won’t be what you want. So, they sell 100Ah lifepo, for ~200 a cell. You’ll need 38. Thats 7600 in bats. Might be 2000 for lead for a similar range.

I’d use a single ratio, and you should be able to get 70-75 with 120V no problem.