Has anyone tried this magic pie-like motor?

[ironmonkey]

I just bought and got this motor running:

http://www.aliexpress.com/item/ebike-motor-24v-250w-350w-500w-36v-250w-350w-500w-750w-48v-250w-350w-500w-750w/445762204.html
http://www.aliexpress.com/store/product/48v-1000w-ebike-brushless-hub-motor-kit/704224_436967174.html

Has anyone tried this motor? Its a narrow but large diameter (30cm) motor like the magic pie.

For such a large motor, its performance is underwhelming. On 72V and 20A its performance is even less than the 9c-like motor I have at stock setting (48V) (less torque and about same top speed). The 9c with massive shunt mod (still 48V) runs circles over it, both torque and speed. Unless the BMS for the 72 battery is defective and only supplying 5-10A, this motor must be a lemon.

PS I'm using greentime controllers for both (48V and 72V). The 48V battery is a no name chinese I bought from alibaba, the 72V battery is from victpower; both lifepo4.

 

[e-beach]

On 72V and 20A

Only 20A on 72v? Even my yescomusa 36v is 30A straight out of the box. Why are you running only 20A?

 

[neptronix]

Open it up and measure the circumference of the stator, and the width of the magnets, and show us a picture of the stator, and one of us can nail down what motor it is a clone of.

20A is kinda wimpy current even for a magic pie-sized motor ( regardless of voltage ).

 

[ironmonkey]

20A is standard, and the BMS allows a peak current of 40A. With 72v the motor definitely should be putting out more torque than my 9c if it wasnt a lemon.


I cant open it up because I dont have a motor opener, maybe one day I will.

 

[neptronix]

https://www.google.com/search?q=pul...273c6646deb170&bpcl=39650382&biw=1280&bih=711

Any 3 pronged gear puller will do the job.

 

[chilledoutuk]

Just out of interest have you only tried the controller that came with the motor?
I suspect that the controller it came with could be limiting the performance you are getting from your motor.

If you try another controller you might get much better performance.

 

[e-beach]

20A is standard

Standard in what way?
I second the notion that it is more likely your controller then the motor. 20A is small-ish for an e-bike hub motor.

I cant open it up because I dont have a motor opener, maybe one day I will.

Opening the motor is easy.

http://endless-sphere.com/forums/viewtopic.php?f=2&t=30243

To get the stator out of the hub, some people just carefully stand to the rim to pop the stator out of the hub.

But before you go through the hassle of opening your motor, ave you tried a 30A or 40A controller to see if that helps?

 

[ironmonkey]

The controller is an aftermarket greentime controller rated for 45A.

The BMS is holding it back at 20A (but allows 40A peaks). I've actually modded the BMS shunts, but performance only improved marginally, if at all.

I will mod the controller shunt when I get around to that.