Does anyone know where to get a 2000 to 3000w hub motor?

[Indubitably]

I'm in the process of building an ebike out of one of the wallmart hyper fitness bikes, and starting to realise that my battery is kind of overkill for an eike application (16s thundersky 40ah cells) so I thought perhaps I should step the project up to something more like an electric moped. My battery configuration right now wieghs in at 56 lbs, 48v, and 40ah, giving it a total watt hour capacity of 1920. I can pull 3c max continuous output, but I plan to to keep my draw around 1c most of the time, so I figure I'm looking at a 48v hub motor rated at about 2000w and 40 amps continuous. Prefferably it would be in a 20 inch rear wheel configuration (I can probably swing a 18 or maybe even 16 inch front wheel, but I'm guessing that would mean I'd need it to be a pretty high rpm motor) and if push comes to shove I can always learn how to lace a wheel myself.

At any rate, any suggestions you guys might have would be appreciated.

 

[spinningmagnets]

So, the bike you have now uses 20" wheels? and you have a 48V battery pack....I "was" going to recommend a Crystalyte 530X series for a 26" or a 24" wheel, but I'm not sure if they fit in a 20". What top speed to you hope to achieve? (even if your most common cruising speed is slightly less than the max.

 

[Indubitably]

I'm thinking about 35mph would work well for my needs, 45 would be nice of course, but anyting significantly over 30 means a whole nother level of seriousness about the braking system and handling. The 4840 racer seems just about right for my needs, the 20 inch wheel would probably drop me down to about 30mph, but that would be acceptable. The only thing that is not acceptable about the crystalyte motors is price, at $700 minimum they are charging one hell of a primium, I'd sooner go with a $175 1000w motor and say to hell with performance or get into a more complicated chain driven system than drop $700 on the motor alone.

This makes a little more sense ay $500, and its made by the same company, but its not quite the size I would need unless I want to do front wheel drive, and I'm just not sure how fwd will affect handling.

http://soundspeedscooters.com/store/parts/romeo-electric-moped-hub-motor-2-000w.html

 

[monster]

definatly go for the X503 in a 20" wheel. i have it. it rocks.

 

[Indubitably]

definatly go for the X503 in a 20" wheel. i have it. it rocks.

What wattage is the x503 rated for? Am I going to be able to push 40 or 50 amps continuous through it and occasional loads of 80 or 90 amps without it melting on me, and what rpm does it put out at 48v?

Also, is the x503 the same as the 5303, 5403, etc?

I was thinking I might go with the phoenix racer branded model if I can find it for around $400 and it is wound to run fast enough that I can use it only 48 volts with a that small wheel. Basically this things needs to be as fast as its ever going to be at 48v because the battery is already too heavy for its own good.

 

[pwbset]

Am I going to be able to push 40 or 50 amps continuous through it and occasional loads of 80 or 90 amps without it melting on me, and what rpm does it put out at 48v?

A 5 series will handle that all day long no problems. Dunno about the RPMs. Ebike.ca has 20 inchers @ 5303...

http://ebike.ca/store/store_motors.php

 

[billvon]

>What wattage is the x503 rated for?

Up to 2000 watts.

>Am I going to be able to push 40 or 50 amps continuous through it and occasional loads of 80 or 90 amps without it melting on me

Yes

>and what rpm does it put out at 48v?

At 48 volts - ~500RPM at max power point.

>Also, is the x503 the same as the 5303, 5403, etc?

No, they are all different windings. The smaller the suffix, the fewer turns on the stator and the faster the motor will run at a given voltage.

 

[RoughRider]

ask here for a X5: http://endless-sphere.com/forums/viewtopic.php?f=9&t=14506&start=0

some people on this forum are riding the X5 with 10kW @100Volts

 

[PhoenixOSU]

What about the carrying capacity of these hub motors? while an e-bike may be typically rider + 100lb or less of bike, a moped/motorcycle can weight considerably more due to the larger frame, instrumentation, and battery. I am confident the Kelly motors can handle any of the "xtreme" type of moped frames, but what about the axle loading capacity off the Crystalyte?