What Are Hall Wires For?

[mybike]

I am building my first Direct Drive e bike. This may be a really dump question.
What are the Hall Wires for?

My Direct Drive Motor spins without the Hall Wires connected to the controller (no test drive yet). Can I just not leave the Hall wires unplugged from the controller as i see lots of posts on people have possible Hall Wire issues on this forum.

 

[Drunkskunk]

Hall wires are for sensors that tell the controller how fast and in what direction the motor is spinning, and allow it to accurately set the timing for firing each coil. They are also used in some applications to get speed data for a speedometer.

If your motor worked without them hooked up, then your controller may have an option for running sensorless. basically, the controller is using all it's technical magic and advanced hocus-pocus to guess where the motor is and which way it should turn, then If it's new then that's fine, most of those can operate pretty seamlessly at normal power levels. Though you may notice the motor runs a little smoother and little quieter with the halls hooked up.

 

[d8veh]

Connect the hall sensors if you have the connectors, but make sure that all the colours match on each side. Sometimes you have to swap two wires to geta match. Yourvmotor will run better with them connected.

 

[mybike]

Thanks Drunkskunk and d8veh

You talking about sensorless I looked at the controller description at greenbikekit.com were I purchased the New Controller recently from and it says Hall sensored and sensorless compatible I did not know what that meant at the time purchase.

The Hall Wires in colour do match up from the motor to the controller.

The bike upside down and the motor seems to spine slow to fast smoothly with no funny noises. I did not notice anything different running with the Hall wires plugged in or not.

I will plug the Hall wires in as the controller has the connections as said. Thanks.

 

[dogman dan]

Likely you'd notice improved running with the halls only when doing an uphill start, or getting started while the wheel is rolling backwards.

Sometimes a sensor less motor will try to run backwards for a quarter inch, then turn around and go forward. So you never get that when you are using the halls.

 

[d8veh]

That's right. You have to put the motor under load to feel the difference.