Pros & Cons of a sensored VS sensorless BL system

[godale03]

Hey Guys,

I was wondering what was meant when they say a BL motor is sensorless or sensored? Also what is the pros vs cons of each. Thanks

Tom

 

[godale03]

Just giving this one bump... then I will let it die.

Bump!

 

[redneckracer1979]

I am not positive on what I am saying as I am new to brushless now. I think the main reason for a sensored brushless motor is for startup. From what I have read it makes the startup smoother. It seems that with a sensorless setup it can handle more power but that just might be the ESC and not neccessiarly the motor.

 

[sweetdiesel]

From the other forum.

"A sensorless controller can run both sensored and sensorless motors. A sensored controller can only run sensored motors.

A sensored motor has a Hall-Effect sensor (hence the name "sensored") inside the motor. This sensor picks up the rotor position and sends it to the ESC via a few small wires. A sensorless controller uses feedback on the main motor wires to pick up the rotor position. So, construction of a sensorless motor is simpler and has only the 3 main motor wires.

A sensored setup is basically free from cogging (where the motor jitters because it doesn't know where the rotor is). Older sensorless had cogging issues, but today's controllers are much better and only cog if going very slow AND are loaded heavily. "

Also, read page 3 of this article for the pros of sensorless systems.

http://www.castlecreations.com/media/articles/rcca-max_review.pdf

Hope this helps.

 

[godale03]

Helps a bunch. I am also new to Brushless and was just looking for a better explaination. Thank you very much for the help. I am now a little wiser. Thanks again!

Tom