Brushless motor noob question

[jason02ws6]

I’m in the process of finishing up a build and am a bit confused on motor wiring. I’m pairing a Tekin Redline sensored motor with a Mamba Max Pro esc. Question is, which wire (red white black) on the esc corresponds with A,B, and C on the motor? The motor wires are all black so it not as simple as matching color to color.


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[midwest_rippa]

if im not mistaken when looking from the back of the motor the wire to the left is always A then B then C. should be marked on there somewhere. if it isnt then that is unfortunate.

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[jason02ws6]

Originally Posted by midwest_rippa

if im not mistaken when looking from the back of the motor the wire to the left is always A then B then C. should be marked on there somewhere. if it isnt then that is unfortunate.

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It’s definitely marked, my question is does A=positive, B=signal, and C=negative?


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[svt923]

Originally Posted by jason02ws6

It’s definitely marked, my question is does A=positive, B=signal, and C=negative?

The ABC wires on the motor are phase wires, they each activate a portion of the magnetic field within the can (ex. A wire activates 1/3 of the magnetic field, B wire operates the next 1/3, and so on). They need to be connected to the ESC in the correct order (when using a sensored motor) in order to make the field generate in the correct pattern to make the rotor spin.

[robert@castle]

The label on the ESC should be marked as to which wire is which. If you don't have a label it is -+ABC.

You can't think of any wire on a brushless motor as positive or negative. Each wire is positive and negative at very precise times during the rotation of the motor in order to make it spin. At one moment A will be connected to + and B will be connected to -. Then 60 degrees of rotation later, B will be disconnected and C will be connected to -. 60 degrees later, A will be disconnected and B will be connected to +. These changes happen hundreds of times per second, so calling and wire positive is incorrect. The only reason that we would use those colors was to save on the number of wire colors we had to stock. If you are curious it is called the '6 step brushless commutation processes'

[jason02ws6]

Originally Posted by robert@castle

The label on the ESC should be marked as to which wire is which. If you don't have a label it is -+ABC.

You can't think of any wire on a brushless motor as positive or negative. Each wire is positive and negative at very precise times during the rotation of the motor in order to make it spin. At one moment A will be connected to + and B will be connected to -. Then 60 degrees of rotation later, B will be disconnected and C will be connected to -. 60 degrees later, A will be disconnected and B will be connected to +. These changes happen hundreds of times per second, so calling and wire positive is incorrect. The only reason that we would use those colors was to save on the number of wire colors we had to stock. If you are curious it is called the '6 step brushless commutation processes'

Thank you. This is exactly what I needed. I guess my brain saw red and black and went +/-, your comment provides tons of clarity!


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