Hub Motor Efficiency

[Deleted member 4366]

I've only compared the 260 rpm Q100H against the 201 rpm Q100. The Q100H is making maximum power at about 15 mph, while as the Q100 is over the peak, so at 15 mph, the Q100H feels much more powerful; however, I didn't notice much difference in acceleration.

I always wanted to try the 48v version of the Q128H. I think yhat it would go quite well. The test report shows 40NM at 37v and 25A. At 48v, it should give 53NM.

 

[tongxinpete]

Bmsbatts show a 36v Q128H & a 48v one, yet they seem to show the same 37v stats for both motors. This makes no sense even if they are the same motor run at different voltages, or for that matter different motors.
If I bought one I would get spokes for both 24'' & 26'' builds, the 24'' would shift power out max (145 rpm) down to 8 mph & top speed down to 15mph.
I would do the same to the xionda with a similar goal in mind. My worst hill is momentary 25% !

 

[Deleted member 4366]

You don't have to do anything fancy. The 48v Xiongda won't have too much trouble on that hill. It dragged my 100kg up a hill that peaks at 31%. I did the same with my 36v one, but I'd soldered the shunt to increase the current to 20A.

The datasheets on the BMSB are typical for a Chinese website. They just stick the same thing on every listing without understsnding the significance. They do the same for battery weights and sizes. You sometimes see the 10ah, 15ah and 20ah all the same size and weight.