Testing hub motor, jolts and sounds funny.

[Snikerdoodlz]

Video: https://dl3.pushbulletusercontent.com/eASgKhUdi9ypzO4SG6XwtLnkhMw5A4os/20201217_113402.mp4

I got a 48v Bafang BPM2 geared hub motor. I just wired it to my Lyen 9 fet controller to test it. When I push the throttle, it seems like it makes almost a grinding sound. It runs only for the time shown in the video, and then it stops turning. If I try to do this more than a few times, the motor doesn't turn at all, but it still makes a coil whine. The motor wire feels like it heats up. You can see that I hold the axle with a wrench at the top to counter the motor torque. I feel that the axle vibrates really strongly, the turning is not smooth.

The Lyen controller supposedly can detect the hall sensor angle, which for this motor I think is 60 degrees. However, I can change the settings to set it to 60 or 120 degrees. I haven't done that yet.

I'm pretty sure it's not supposed to do this. What could some issues be?

Here's a video of another guy testing the same motor:
https://www.youtube.com/watch?v=9UGp19Imulc

 

[neptronix]

Sounds exactly like a incorrect hall/phase combination.
First thing.. try swapping the blue and yellow phases.

..if that does not work, try all of the combinations possible... but do not swap the red/black hall sensor wires around as that will spell disaster for you.

 

[Snikerdoodlz]

Thank you! That was the problem. I connected the yellow, green, and blue wires to each other from the controller and motor, but I guess they mean different things on each. I switched one pair and it works now.