I just finished building my 2nd ebike last night. The setup is an EZEE rear gear hub motor, the 350RC model from Grin. The motor is powered by the Phaserunner. My battery is a 14S4P from EM3EV. The bike is a longtail, and Xtracycle Edgerunner swoop.
The problem I am having is that the motor usually is stuck in a chattery mode of operation - it sounds like a kid making machine gun noises or maybe the end of woody woodpecker's laugh. I think this is a commutation issue, because about 1/5th of the time I can get the motor to run smooth. I can cut and restart the motor on the run to try and get the smooth running mode. It seems to run smoother under high load, like a steep hill. The chattery behavior exhibits itself under both throttle and cadence PAS modes. If I am able to lock into a smooth commutation, it stays that way until the motor is let off. The chattering behavior is enough to shake the bike. I have witnessed this before with a wrongly tuned brushless motor with FOC in an industrial application.
During the autotune of the phaserunner, I was only able to pass the static test 2/4 times that I tried it. It did make the same buzz each time. The phaserunner is set with the proper number of poles (80), and adjusted the Kv away from nominal on its own. The phaserunner is in "Hall start, sensorless run" mode. I tried setting to pure hall mode, but it changed itself right back. I then read that sensorless run is better for a FOC anyway.
Do the orientation of the phase wires into the phaserunner matter? I did reterminate the phase wires with the MT60 connector so that I could direct plug into the controller, without using the patch harness. In doing so, I noticed that the EZEE pigtail and the extension harness were setup from Grin to swap the positions of the green and blue wires, so I copied the effective pinout that would be achieved using their harness, with the layout that they had for the andersons.
Very frustrating.... I had such an easy time getting my first build going. That used the Grin AA hub motor with a phaserunner. Smooth as can be.
The problem I am having is that the motor usually is stuck in a chattery mode of operation - it sounds like a kid making machine gun noises or maybe the end of woody woodpecker's laugh. I think this is a commutation issue, because about 1/5th of the time I can get the motor to run smooth. I can cut and restart the motor on the run to try and get the smooth running mode. It seems to run smoother under high load, like a steep hill. The chattery behavior exhibits itself under both throttle and cadence PAS modes. If I am able to lock into a smooth commutation, it stays that way until the motor is let off. The chattering behavior is enough to shake the bike. I have witnessed this before with a wrongly tuned brushless motor with FOC in an industrial application.
During the autotune of the phaserunner, I was only able to pass the static test 2/4 times that I tried it. It did make the same buzz each time. The phaserunner is set with the proper number of poles (80), and adjusted the Kv away from nominal on its own. The phaserunner is in "Hall start, sensorless run" mode. I tried setting to pure hall mode, but it changed itself right back. I then read that sensorless run is better for a FOC anyway.
Do the orientation of the phase wires into the phaserunner matter? I did reterminate the phase wires with the MT60 connector so that I could direct plug into the controller, without using the patch harness. In doing so, I noticed that the EZEE pigtail and the extension harness were setup from Grin to swap the positions of the green and blue wires, so I copied the effective pinout that would be achieved using their harness, with the layout that they had for the andersons.
Very frustrating.... I had such an easy time getting my first build going. That used the Grin AA hub motor with a phaserunner. Smooth as can be.