Leafmotor

Q:Just a quick question. What is the tooth count on the freewheel sprocket?
A:16T or 18T
Q:Do you know which one? I may want to change it to a different tooth count.
A:Please click below site. This kind of single cog. (If you told us before shipment. We can put this one in parcel for free.
Q:I still wasn’t sure what front chain wheel to rear cog combination would work best with this motor. I can get the cogs here easily.The hub motor arrives today. Well done as always! Hey, I need the Kv for the motor in RPM/V and the number of pole pairs for my controller.
A:about 19 rpm/ V, 46 pcs magnets (23 pair)
Q: I am finally setting up the new bike motor. I assume the 750w is a 48v based version so the rpm if we use the provided figure kV figure of 19 rpm/V is around 912 rpm. Am I correct?And what is the max phase current on the motor?
A:We didn’t test this hub motor on machine. We worry load it that will break this bike motor.
So don’t know max current.
max phase current is about = 1/3 of max current.
Q:Thank you for explaining max phase current but can you approximate what your other similar hub motors had for a max current and then I can approximate from there. I need it to complete setting up the controller.
For example, what is the 4T 750w 48v max current or what is the 1000w 48v 4T max current, etc. From there we can get pretty close to what it is.
I am doing lots of diagnostics and see that my bike motor is maxing out at around 731 rpm. Why am I not getting 912 rpm?I am getting a max rpm of 763. I am using a 52v battery.
A:For example: 1500w 4T no load speed is about 610rpm @48v works with square controller
1000w 4T no load speed is about 720rpm @48v works with square controller
I think your 4T hub motor max about 830rpm no load speed works with square controller
If works with sine wave controller, 10% slower than square controller, about 747rpm no load speed.