Clicking noise - Hall sensors?

[morningglory]

Hi,

I have a 48v 1000w Voilamart kit which has been working fine until the red hall sensor wire broke. Soldered back up, worked for a bit, now I get nothing except a clicking noise from the hub when I turn the throttle and no wheel rotation.

When I rotate the wheel, I get the following voltages from the hall sensor wires:
Black to red 4.5v
Black to blue 0-5v ie. 2.5v average
Black to green 5v constant
Black to yellow 5v constant

Red to blue -0.6 to 4.5v
Red to green - 0.6v constant
Red to yellow - 0.6v constant

Shouldn't the voltages vary when the wheel turns? No phase wires or anything appear to be shorted and the battery is good. Could it be the controller? The throttle?


Any help much appreciated!

 

[vfr400]

You need to turn the wheel backwards while you test if it's a geared motor

 

[morningglory]

Direct drive motor, no internal gears so I've been rotating it forward. Been faffing with it for ages and its doing my head in.

 

[vfr400]

How did the red wire break? The only logical situation that fits your description is that the ground wire is broken too unless the red wire shorted on a phase wire. We need more details of what happened.

 

[morningglory]

How did the red wire break? The only logical situation that fits your description is that the ground wire is broken too unless the red wire shorted on a phase wire. We need more details of what happened.

The red wire broke where all the wires come out of the axle and bends 90 degrees (rubbish design). The insulation on one of the phase wires was worn through at the same point as well so maybe it did short it. Doesn't sound good. What might that mean? Thanks for the replies by the way.

 

[vfr400]

That would mean that you need three new hall sensors, plus you need to pull the wire through the axle past the broken bit, cut it and unsolder what's attached to the hall sensors and windings, then solder on the new wires.

There's also a small chance that you've blown some mosfets in the controller, especially if you tried full throttle for any length of time when the motor wouldn't turn.

It might be easier to buy a new kit if you don't want to mess about because they don't cost much.

 

[morningglory]

That would mean that you need three new hall sensors, plus you need to pull the wire through the axle past the broken bit, cut it and unsolder what's attached to the hall sensors and windings, then solder on the new wires.

There's also a small chance that you've blown some mosfets in the controller, especially if you tried full throttle for any length of time when the motor wouldn't turn.

It might be easier to buy a new kit if you don't want to mess about because they don't cost much.

Balls. This is really helpful though, thanks. I'll start with some new Hall sensors, check the voltages, then see if I'll need a new controller as well.

 

[morningglory]

Success! For anyone reading this for reference, the Hall sensors on the Voilamart 1000w hub read "502A 85" something. I don't really understand the ratings but after a bit of research, I bought some 41F/SS41/SH41/SS41F type and soldered them in no probs. All working.