Rear Hub Motor Making Weird Noise

[UniversalModder]

Hi guys i'm having a problem that just began today my rear hub motor is making a weird noise whenever i try to give it some power not sure whats causing it i testes all the cables from the controller and nothing seems to be wrong not sure if anyone could help thanks in advance. here is a link to the video that shows the noise. https://www.youtube.com/watch?v=RsA92rfKM1Y&feature=youtu.be

 

[amberwolf]

What happened, or what was changed, just before the problem started?

Was there a crash, or did it fall over on it's side? Did you have to patch or change a flat tire? Or did it get hot? etc?


I just get a blank page when I try to open that page or the site's homepage.

 

[UniversalModder]

What happened, or what was changed, just before the problem started?

Was there a crash, or did it fall over on it's side? Did you have to patch or change a flat tire? Or did it get hot? etc?


I just get a blank page when I try to open that page or the site's homepage.

Nothing happened last time i road it i put it away like normal and the next day i went to get ready to ride and this happened also here is a new link to the video https://www.youtube.com/watch?v=RsA92rfKM1Y&feature=youtu.be

 

[amberwolf]

Is it a geared hub, or DD?

If it's a DD, then the sound could be the controller using trapezoidal drive, rather than sinewave. If it had previously been using sinewave (which is usually quieter), then if it is like the Grinfineon current generation of controllers, it falls back to trapezoidal when it runs sensorless, meaning the hall sensors arent' readable by the controller (or aren't working), which usually means the connector has come unplugged or is not making a good connection, or the motor wires are damaged coming out of the axle.

 

[UniversalModder]

Is it a geared hub, or DD?

If it's a DD, then the sound could be the controller using trapezoidal drive, rather than sinewave. If it had previously been using sinewave (which is usually quieter), then if it is like the Grinfineon current generation of controllers, it falls back to trapezoidal when it runs sensorless, meaning the hall sensors arent' readable by the controller (or aren't working), which usually means the connector has come unplugged or is not making a good connection, or the motor wires are damaged coming out of the axle.

Thanks for the advice I checked with a multi meter and everything seemed normal when the controller was connected and I also ended up taking the motor apart to check the inside and it looked normal to me no loose magnets and any problems to the hall sensor from inside not sure what else it could be now here are some photos https://imgur.com/a/h0HeCxp

 

[Balmorhea]

In my experience, Hall sensors that have been cooked or otherwise damaged look the same as good ones. The sound in your video is the same to me as what I am accustomed to from a cheap trapezoidal wave controller.