Votol em30 with chinese 1000w ebike motor hall sensor angle adjustment

[Electro1980]

Hi
Newbie here, just got into the ev scene.

I’ve got a qs 260 Hub Motor (1500w) running on a em50. Qs state the hall angle is 120 degrees for the motor but they also state the hall angle in the em50 is -60 degrees and is set to a qs hub motor. Which is right? Just don’t want to damage the motor before I even get into this hobby.

Any help would be appreciated
Cheers all

 

[amberwolf]

Almost every hubmotor is 120. A 60 motor will output a different "table" of values, and can output one that includes all halls on at the same time (you won't see this on a 120 degree motor), so if you can monitor voltage on all the halls at the same time and hand turn the motor, you'll see which one it is.

If for some reason your motor is one version, but you need it to be the other (if the controller can't be changed in it's settings, etc), you can "invert" the center hall signal, with a transistor, or with an open-collector inverter chip (74U04), etc.

Or physically flip the center hall over inside the motor (which results in the same effect, except it makes that sensor slightly less sensitive to the magnets passing it--not usually a problem).


If there is a mismatch between the motor and controller, the controller won't run the motor since it can't correclty detect the rotor position vs windings. If it has an auto-identify / self-learn feature, that will probalby fail to find a usable phase/hall combo if there is a mismatch.


There are a few VOTOL threads around here discussing various problems with them, including their setup program issues, which may include wrong settings and/or wrongly marked options.

 

[Electro1980]

I’m trying to get a 1000w 48v generic Chinese e bike hub motor to work with a votol em30. As standard the hall angle shift is -60 (controller settings) I believe the motor is 23 pole pairs and has a hall angle of 60 degrees. Has anyone got any idea what is the best hall angle shift for this motor is.I think as default they are set up for qs motors with a hall angle of 120 degrees.

It runs terribly at -120 -60 0 60 and 120 degree adjustment?

Many thanks

 

[amberwolf]

If the motor actually has 60 degree halls, then you'll have all zeroes (0v) and all ones (5v) at the same time as possible combinations. Those don't occure on 120 degree hall motors, so if you can test all the halls at the same time for voltage, or if the controller software shows their status as you manually turn the motor by hand, then you can tell which one the motor is.

60 degree is pretty uncommon, 120 is what I see on every generic DD hubmotor I've worked with so far.


IIRC, (there's threads that discuss it but I'm too wiped out from my workday to search ATM) you can turn a 60 degree motor into a 120 (or vice versa) by physically flipping the center hall sensor over. (if they are all beveled side up, flipping the center one beveled side down--the only potential issue with this is that the beveled side is where the actual sensor is, so it reduces it's sensitivity to the magnets passing it by doing this).

 

[j bjork]

Here is the votol thread:
https://endless-sphere.com/forums/viewtopic.php?f=7&t=95969&start=2300