Hub motor noise/controller problems. Only works for couple seconds

multifrag · Mar 7, 2018

Brought back from the dead an old project of mine. Rewired all the cables and powered it up. Surprise, surprise it does not work as expected. Does not want to start from standstill and when given a push it only works for an instant before the throttle gets unresponsive and I have to reset the throttle position. Could it be the hall effect sensors or there is something with the hub?

https://www.youtube.com/watch?v=N2XRXkqosgE

Edit:
The screen is saying that something is wrong with the hub. I've checked the hall wires for continuity, gonna check if phase wires are intact...

Edit 2:

One of the Hall sensors GND is in short circuit with signal wire...
The waterproof 5 pin connector has 2 pins in short circuit...

amberwolf · Mar 7, 2018

Are you certain you have the right phase/hall wiring combination?

If not you will want to either use the self-learn jumper function of the controller, if it has one, or look up the How to determine the wiring for a brushless motor thread or wiki article and find the right combo for it.

If that still doesn't do it there could be something else wrong, like a bad connection in the hall or phase connectors or wiring, or a bad hall in the motor, etc.

multifrag · Mar 7, 2018

amberwolf said:
Are you certain you have the right phase/hall wiring combination?

If not you will want to either use the self-learn jumper function of the controller, if it has one, or look up the How to determine the wiring for a brushless motor thread or wiki article and find the right combo for it.

If that still doesn't do it there could be something else wrong, like a bad connection in the hall or phase connectors or wiring, or a bad hall in the motor, etc.

The connections are solid to the halls. Can't test the halls themselves. My controller is generic Chinese one, not sure if it has self learn capability.

SlowCo · Mar 7, 2018

How are you powering this? With an old battery that sags so much that the controller shuts down as the LVC kicks in and then goes again etc?

multifrag · Mar 7, 2018

SlowCo said:
How are you powering this? With an old battery that sags so much that the controller shuts down as the LVC kicks in and then goes again etc?

With the battery that works just fine on bafang bbs02. Charged to 50v right now, so not the battery

amberwolf · Mar 7, 2018

multifrag said:
Can't test the halls themselves.

There's a good how-to on http://ebikes.ca in the Learn / Troubleshooting tab.

multifrag · Mar 8, 2018

amberwolf said:
multifrag said:

Can't test the halls themselves.

Click to expand...

There's a good how-to on http://ebikes.ca in the Learn / Troubleshooting tab.

Thank you very much for the help. I have tested all the wires for short circuit and my waterproof cable had 2 pins in short. Would have never guessed its possible but glad I've checked.

skeetab5780 · Mar 8, 2018

I would separate those three phase wires just for piece of mind...even if they are isolated from one another it just scares me

multifrag · Mar 8, 2018

skeetab5780 said:
I would separate those three phase wires just for piece of mind...even if they are isolated from one another it just scares me

It's a 3 pole connector MT60. Just like xt60 we use for batteries. (https://goo.gl/q4Juas) So not sure what could scare you

skeetab5780 · Mar 8, 2018

multifrag said:
skeetab5780 said:

I would separate those three phase wires just for piece of mind...even if they are isolated from one another it just scares me

Click to expand...

It's a 3 pole connector MT60. Just like xt60 we use for batteries. (https://goo.gl/q4Juas) So not sure what could scare you

Oh that's cool for a quick glace it looked like three bullet connectors taped together

fechter · Mar 8, 2018

I wish they made a XT90 size version of the 3 pin connector. 3D printer?

multifrag · Mar 8, 2018

fechter said:
I wish they made a XT90 size version of the 3 pin connector. 3D printer?

I'd love some xt90 size one also. Plausible, but I would 3dprint it, make a cast, insert the contacts and pour the plastic in. Otherwise you would have to print thicker walls and bake it in the oven for better temperature resistance

Hub motor noise/controller problems. Only works for couple seconds

multifrag

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amberwolf

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multifrag

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SlowCo

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multifrag

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amberwolf

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multifrag

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skeetab5780

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multifrag

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skeetab5780

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fechter

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multifrag

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