Wiring question..6 wires from the motor??

[ebike11]

Hi guys,
My friend just picked up a used 36V brushless motor and wheel without controller.
It only has six wires though, blue green and yellow phase wires and three other wires, black red and white that
are very thin like hall sensor wires. Would anyone know where these three go to on a new controller??
He will buy a controller this week.
Thanks!

 

[amberwolf]

Sounds like those other three are a temperature sensor, or perhaps a speed sensor (like Fusinmotors uses in their sensorless geared motors like in my review thread).

Most likely the motor is sensorless, with just the three phase wires being "required" to hook to the controller. Probably the three thin wires dont' have to be hooked to anything--but to find out the wire order and what they go to, you'd either have to find who made it and get a spec sheet/diagram from the, or find postings about an identical motor that someone has already figured out what they are and posted about, or you'd have to open it up and figure it out.

We might be able to help more if you posted clear detailed pictures of the motor itself, and posted any markings it might have, or names/numbers. May still require opening it up and getting pics of the inside, to figure out the three thin wires.


But I would bet that you can just ignore those three wires and use it as sensorless.

 

[ebike11]

OK ill try jist the three phase wires and see if it spins

 

[dogman dan]

I'd be curious enough to pop it open and see. A temp cutoff switch should be just two wires. So I'm all curious why three?

I guess three wires would be a hall sensor. But why not two wires just like a bike computer for a speed sensor?

Whatever it is, it will run sensorless. Any brushless motor can run sensorless with the right controller.

 

[ebike11]

I'd be curious enough to pop it open and see. A temp cutoff switch should be just two wires. So I'm all curious why three?

I guess three wires would be a hall sensor. But why not two wires just like a bike computer for a speed sensor?

Whatever it is, it will run sensorless. Any brushless motor can run sensorless with the right controller.

Hi,
I connected the three phase wires to my KU93, but the wheel turns really slow...Im thinking the thin black, red and white wires must be necessary to
have connected in order for the motor to run properly
Should I connect the red and black wires to the hall sensor black and red plugs on the KU93 ??

 

[ebike11]

Here is some additional info on the motor: Permanant Maganetic Brushless Geared Motor

I also seen in the basic specs, "Double Loop Type". Have no idea what that means?

 

[teklektik]

I guess three wires would be a hall sensor. But why not two wires just like a bike computer for a speed sensor?

I connected the three phase wires to my KU93, but the wheel turns really slow...Im thinking the thin black, red and white wires must be necessary to
have connected in order for the motor to run properly
Should I connect the red and black wires to the hall sensor black and red plugs on the KU93 ??

This might be for an LM35 temp sensor (as installed by EM3EV in MACs). Datasheet. It reads 10mv/degC allowing temperatures to be monitored directly on a common multimeter (voltage) without conversion .

You might hook up the red/black wires as you suggest to try to power the device and hook a multimeter across the white/black wires and see if the voltage looks like the ambient room temperature in degC. These devices like to have a 400ohm pull down resistor to ground (close to the device is better), but give the test a whirl.

 

[ebike11]

Thanks.
I also noticed that a
the twist throttle uses the same thin black/red/white wires in some cases.
But would that have anything to do with anything?

 

[ebike11]

We found out that the 36V300W front motor is a "Dapu motor"
It is listed as not having a torque sensor or controller built into it.

I found this: "On a bike like the BH Neo, the torque sensor is designed into the rear dropout. The motor is also found on the Neo Jumper and City Commuter."

Would the thin black red and white wires have something to do with a torque sensor??

 

[d8veh]

Three wires is a sensor. It's easy to find out what it is without opening the motor. Put 5v on the red and black wires and turn the wheel, if the white wire pulses on and off at 5v, it's a speed sensor. Hold the motor still, and apply some torque to the sprocket. If the voltage on the white wire goes up and down, it's a torque sensor. If it's neither of those, run the motor, and see if it changes with temperature.

The Dapu motor in the BH Emotion Neos has a speed sensor in it, so that's probably what it is.

 

[ebike11]

Three wires is a sensor. It's easy to find out what it is without opening the motor. Put 5v on the red and black wires and turn the wheel, if the white wire pulses on and off at 5v, it's a speed sensor. Hold the motor still, and apply some torque to the sprocket. If the voltage on the white wire goes up and down, it's a torque sensor. If it's neither of those, run the motor, and see if it changes with temperature.

The Dapu motor in the BH Emotion Neos has a speed sensor in it, so that's probably what it is.

Ok thanks
Well my friend wont be using the PAS or anything for pedalling assistance, so is it ok just to leave em unlooked and tape them up?
We swapped the phase wires around and we got the wheel turning pretty fast, woo hoo!
The colored wires were different so now that has been figured out.