Stuttering Pulsing On Initial Start

[amberwolf]

If the controller has a good autodetect routine, it may get you close enough to either just work or to start off with anyway and tune from there.

Accurate specs for most of these motors don't exist. Usually have to be determined by the end-user prior to setup, depending on which specifics are required for the controller (vs which it can detect on it's own well enough).

Phase resistance you can get by running a known current thru the winding and measuring the voltage drop; ohm's law gives the resistance.

Kv (RPM per volt) you can measure by measuring motor RPM (phone apps, etc) at full throttle offground with the measured battery voltage at that moment it will be approximately that at the motor itself, close enough to use this number as a starting point.

Inductance you'd need something capable of measuring the very low inductance of the motor, and meters for that can cost as much as controllers (or more). If there's a DIY way of measuring it, I haven't been able to find it or get anyone that knows to tell me how.

number of poles (or pole pairs) is the magnet number (or divided by two for pairs).

Also, this, in the other thread you're discussing this problem in:
https://endless-sphere.com/forums/viewtopic.php?f=30&t=100331&p=1735810#p1735810

 

[999zip999]

Nice pics and thanks for following up as this is getting interesting . With info.

 

[Braddudya]

I am adding photos here as well so everyone can see the timing on this thread. I am probably not supposed to be discussing this in two places at once but the other thread in motor tech seemed very relevant so I was hoping we could solve it there!




Standard rotation for this motor would be counter clockwise (from this orientation looking at the back of the motor) and my desired rotation, that doesn't seem to work, is clockwise.

I'm no expert but it doesn't appear to be neutrally timed.

 

[amberwolf]

My reply over there
https://endless-sphere.com/forums/viewtopic.php?f=30&t=100331&p=1735810#p1735870

 

[lnanek]

There is a loop connection off the controller that is unlabeled. I thought maybe it was the "smart wire" or "learning wire" but it doesn't seem to do anything whether it is connected or disconnected.

Those single loop wires are often a speed limiter that you disconnect to derestrict the controller. Have you tested forward top speed with it connected and disconnected? Maybe your forward performance will improve without it and you won't have to run the motor backwards.

 

[GR8TECH1]

You can buy a motor tester on Amazon or Alieexpress