set motor phase with KT-LCD8H display

[handlebar]

A couple of years ago I put a Bolton 35-amp controller of my Radrunner. Now I've put a 25-amp controller on my Radmission.

The Radmission has a direct-drive motor and I didn't know how many magnets. I switched off the battery, unplugged the motor, shorted two of the three pins, and turned the wheel backward one revolution. There were 96 bumps, so the motor has 96 magnets.

What about C2? The display manual calls it the "motor phase classification coding setting." The default is 0, "indicating that the used Quantum motor phase is an ordinary one."

That's Greek to me. I'd love to see if another setting was somehow better, but I'm afraid that maybe the wrong setting would allow too much current to flow, damaging the motor or the controller.

Does anybody know what "motor phase classification setting" means?

[Altema]

All the "quantum phase" terminology is probably a mistranslation. By "ordinary", it means normal sine wave. A better translation is below.

C2=0 (Motor Phase Classification Coding Mode. 0 - 7, 0=sine wave)

[handlebar]

All the "quantum phase" terminology is probably a mistranslation. By "ordinary", it means normal sine wave. A better translation is below.

C2=0 (Motor Phase Classification Coding Mode. 0 - 7, 0=sine wave)

Thanks. Now I wonder why a bicyclist would want something other than sine waves.

[FortunatelyTheMilk]

I think it's because it's cheaper to produce a controller that approximates a sine wave?

[handlebar]

I think it's because it's cheaper to produce a controller that approximates a sine wave?

https://www.electricbike.com/sine-wave/
Here's an article from 2013. It seems sine wave controllers were new and the price was expected to come down. According to the article, the other choice is simply to switch the current on and off. In that case, I wonder why there are eight options.

[handlebar]

I think it's because it's cheaper to produce a controller that approximates a sine wave?

https://www.electricbike.com/sine-wave/
Here's an article from 2013. It seems sine wave controllers were new and the price was expected to come down. According to the article, the other choice is simply to switch the current on and off. In that case, I wonder why there are eight options.

https://www.youtube.com/watch?v=sL3bjQZGjoQ

In this video, they put a Frankenrunner controller on a Radrunner.  It interfaces with a PC that shows the effects of changes, such as current in the windings. I gather that the eight options of the Bolton controller allow one to change the relationship between the three phases. It seems that doing this could reduce back EMF to get a slightly higher top speed. However, this could mean less torque (acceleration), less range, and more heat in the windings.