Bipolar vs Omnipolar Hall Sensor, Can i switch?

[Artenidas]

Hi. I have an electric Cross with a gear motor in the workshop today, in which one of the Hall sensors died from what I can see by the designation there are Hall SS451A ie omnipolar, and I have in my possession a bipolar SS41F from my QS205. Will this work when connected? Cross is some kind of Chinese engine.

 

[TommyCat]

From reading the data sheets it would seem that the SS41F would give you half as many signals for pole changes as the OEM one.
So I wouldn’t think mixing the two would work.

Does the motor seem to have a small number of magnets?


Regards,
T.C.

 

[Artenidas]

The motor has 8 megnes. I know this much that it will definitely not be compatible because I already installed ss41f and the motor spins 2x slower. That is, it comes out that the magnets have different poles and thus it detects every 2nd magnet because ss41f must have magnets with one direction, and in ss451a the polarity can be different. That is, one magnet N and the other S. Minor point. I'm betting that this Chinese controller is programmed for omnipolar hall and hence the conflict that the motor spins twice as slow.

Translated with DeepL.com (free version)

From reading the data sheets it would seem that the SS41F would give you half as many signals for pole changes as the OEM one.
So I wouldn’t think mixing the two would work.

Does the motor seem to have a small number of magnets?


Regards,
T.C.

 

[TommyCat]

Thank you for confirming the operational characteristics.

I have a small magnet count BLDC motor that I've been thinking about installing hall sensors. Will keep these differences in mind.

Does this mean a controller capable of running a motor with SS41F halls will run twice as fast with the omni-polar?