250w hub motor max voltage

[psycosis]

I recently purchased this lot used from someone:
250W bafang rear hub motor
36V controller (pictured)
36V Nimh battery (from 50 cycles) 9Ah

I had a cyclone motor and the chain was causing me issues by constantly jamming so i have this little lot attached to my bike now. I like the acceleration from the cyclone and the speed is great. This new hub motor is rubbish,slow top speed and slow acceleration. What can i do about this without going out and buying a new one. I know hub motors are a bit slower, but i can pedal a lot faster than this motor so its actually taking me longer because of the extra weight.

The controller looks like the type the crazyman controllers are based on and the guy i bought it from said he thinks its good for 50v, but i wouldn't mind confirmation on this.
The rear hub motor doesn't have any obvious markings on it, it does however have the company it was bought from.
.View attachment controller.jpg

I have a 48v Ping 20ah battery sitting at home, which i can connect up if required for the extra power.

I know this is a bit basic, but if i can get 25mph out of this without pedaling then that will suit me fine. I got 30mph+ from my cyclone motor on the flat.

 

[psycosis]

I see from one of the other posts this is going to shortern the lifespan of the motor, but i don't mind about that since its only a few miles per day.
Alternately if someone can suggest a better cheap hub motor i can just plug in and run at 36v and not have to mess about with trying to push this one.

 

[dogman dan]

You'd need a 48v controller, since the ping is over 50 volts. For speed though, you'd be better of selling it off, and getting a dd hubmotor. then run it on the 48v ping.

Meanwhile, bolt er up, and ride it anyway with the 36v nimh batt.

 

[neptronix]

48v isn't stretching it too far on most bafangs. Post a pic of your motor, some bafang aficionados on here may know.

As for the controller, open 'er up and look at the caps. 60+v caps means that it very well may handle 48v without a hitch.

 

[psycosis]

Here are the motor pics.
I think the guy i bought it from opened it up and said it could take 50v, but i guess i will need to open it up and check. What am i looking for exactly inside.

 

[neptronix]

Looks like a MXUS motor to me ( ebikekit, ampedbikes, etc. ) The stock controller that comes with that is probably 14a with 50v caps just like mine.

In that case, this thing can't handle much more volts. 48v charges to well over 50v hot, 40v may work but it is a small step up. You are probably looking at upgrading the controller, and for that motor i would suggest a 20 amp or under controller that can handle 48v.

Can't push these things too far without chewing up the gears. That's the limit of your kit.

Dunno what your battery is, but i found that 10s of hobbyking lipo was quite nice on my 250w kit, the low voltage sag allowed me to go 17-18mph at the middle-top of my 37v charge ( 42v )

 

[psycosis]

That would make sense with what i was told about the controller, the guy i bought it from mentioned something about 50v.
It seems i need to probably put up with this or change the whole lot to get something a bit faster.

Thanks for your help.

 

[kriskros]

there are earlier reports[on ES] of bafangs taking up to 72volts and 10 or [ithink]even 20amp;s... change one nylon gear for a steel one ...see Lyen i ran 36v 20amp on a bafaNG,one steel geer ...1800 miles ,,no problem

 

[spinningmagnets]

Perhaps consider the cell_man 500W kit. $150 for hub-motor, throttle, and controller (since you already have a battery). I "think" the controller in his kit will take 48V, but verify before buying...

http://www.emissions-free.com/catalog/i14.html

 

[neptronix]

Perhaps consider the cell_man 500W kit. $150 for hub-motor, throttle, and controller (since you already have a battery). I "think" the controller in his kit will take 48V, but verify before buying...

http://www.emissions-free.com/catalog/i14.html

It will. I have talked to cell_man about this kit before and 48v is no problem for the DD motor. He says it can pull 2000w, no problem, as well. Like most DD hub motors, it is certainly overbuilt for the task and can handle a lot of juice.

 

[psycosis]

Excellent, i will check this out, at the bare minimum this will allow me to go a wee bit faster.

Thanks again.

 

[FMB42]

Check the speed limiting circuit (2 blue wire pigtail).

Here's an ES link with some info on this controller brand:

http://endless-sphere.com/forums/viewtopic.php?f=2&t=3834

The blue 2 wire "pigtail" speed limiting circuit should, afaik, have a removable "jumper wire/connector". This jumper, afaik, should be removed for "unlimited" speed.

BTW, the top speed on a 250w 36v system should, imo, have an unlimited (level ground) speed of ~13-15 mph with an average rider weight of 190lbs.

 

[psycosis]

The controller has a small Thing attached to the blue wires. I imagine it's some sort of resistor adjustable with a screwdriver.
Something that apparently enables the speed to be adjusted, I was told when I purchased this is is at maximum. I tested the bike with a gps device to check the speed and the bike does 15.5-15.8mph on a flat surface.

The controller certainly looks similar. I will take a look when I ride home.