So I tried 48 volts....

[djinn]

...and holy cr*p what a difference it made!

I've got a Goldenmoter 500 watt, 36 volt rear motor setup. I did the zener diode trick to the standard controller (I haven't modified the LVC yet, but will eventually get around to it), and upgraded the phase wires down to the axleshaft with 16 gauge. (I have some 16 gauge teflon insulated wire that I will eventually use, opening the motor up and replacing the phase wires all the way, but that will be a project for this winter.) I'm still using SLA - it's cheap, and works fine for experimenting for now.

Running 36 volts, top speed was between 17 and 20 mph (checked with the stationary radar "your speed is" sign at work - I don't have a speedometer yet).

I have not checked top speed at 48 volts yet (they move the sign around; I have to find where they put it and make a run by it), but the bike moves much faster on the flat, and doesn't slow down on the (slight) uphills around here. The motor gets slightly warm to the touch, but it did that at 36 volts anyway, so it doesn't seem to be having any problems handling the higher voltage.

All in all, 48 volts is *sweet*!

 

[Ypedal]

Nice !!.. now wait t'ill you get into the 72v setups.. with a " boost " pack

A gearless, brushless, direct drive motor should use at least 48v, only problem is this also takes the speed factor up a bit.. reason for using a slower motor and volting up.

 

[Drunkskunk]

The GM is about equil in speed to a Clyte 408, and at 48V mine does 22-25mph on lead, if that helps any. Welcome to the quest for speed!

 

[Link]

It should be doing around 26-27. That's what mine does on lithium, anyway. I've had it up to 30.1 with a tailwind, though.

 

[karma]

Nice !!.. now wait t'ill you get into the 72v setups.. with a " boost " pack

A gearless, brushless, direct drive motor should use at least 48v, only problem is this also takes the speed factor up a bit.. reason for using a slower motor and volting up.

i just upgraded my goldenmotor to 72volts, totally insane speeds. im still picking the bugs out of my teeth

 

[Link]

i just upgraded my goldenmotor to 72volts, totally insane speeds. im still picking the bugs out of my teeth

Sweet...I'm thinking of doing the same with a boost pack. How fast does it go and how hot does it get?

 

[karma]

the hubmotor stays at about the same temp as 48volts but the controller is a problem, im just now finding its overheating even with axtra cooling.
so im just going to upgrade to the SUCTEAM 72v controller.

http://cgi.ebay.ca/72V-1000W-brushless-controller-for-E-bike-scooter_W0QQitemZ300252066646QQihZ020QQcategoryZ11332QQssPageNameZWDVWQQrdZ1QQcmdZViewItem


speed hmm not sure my sigma speedo fell off my bike and the face came off, but i can say it been a long time since i could here the spokes cutting threw the wind. its like one big down hill heh. well that and im am now one with traffic, im not geting cutoff anymore

 

[mikereidis]

so im just going to upgrade to the SUCTEAM 72v controller.

http://cgi.ebay.ca/72V-1000W-brushless-controller-for-E-bike-scooter_W0QQitemZ300252066646QQihZ020QQcategoryZ11332QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Is that a new 2008.8 controller ? Know anyone who's used that one yet ? I want one.