Is it possible to turn on boost function with sensorless brushless motors?
 

Dear all,

I will be joining an on road race which hands out sensorless motors.

Wondering if it is possible to use the boost function on my esc for sensorless motors?

Or boost just doesn't work with sensorless motor?


Thanks

Theoretically it is possible, but you should tell what esc you have to get any useful answer. ;)

I'm pretty sure for boost to work it has to know where the rotor is at any given time. The only way to do that is with the sensors. Boost is RPM based (start adding at x RPM, stop at y RPM).

Nope, sorry there is just straight advanced timing through the esc. Boost and turbo functions are directly related to sensors. On a Tekin for example, there is sensors only which allows boost and what not, if you sensor wire got unplugged it would. Of ur. Right. Or they have a dual mode where it starts in sensors for a smooth start but the. Kicks out of sensored for the effeincy of sensor less. But that is a no boost mode as well.

Boost, dynamic/ramping timing advance is possible I think, but I don’t know of any controller that does it. Probably due to the limitations of timing advance of sensorless operation, not worth the implementation effort.

Sensorless controllers pick up the rotor position by analyzing the motor reaction (back emf), but at least as I understand it that gets more difficult as some timing is added.

Castle controllers can add some static timing, not seen it mentioned on any others.

My Hobbywing SC8's and 150A's will add fixed timing.

My Brushless Hobbies 120A will indeed turbo ramp on a sensorless motor. However, this turbo ramping is done by adding additional timing based on detected RPM, so it's not as accurate or efficient, however the effect is the same! Cranking the ramp up has made the poor Velineon 3500 in my Pede 4x4 very unhappy when I was screwing with it. :P

Does sensorless boost work with Hobbywing v3?

Only if your ESC supports it.

Old post , Ai wants a go! Lol!
 

I asked this same question and Google Ai came back with the following answer. (I searched if a sensorless ESC can use Turbo and/or Boost , after seeing someone selling an RC car "Turbo & Boosted Vgood 150a 6s ESC" on eBay that looks sensorless and im fairly certain Vgood doesn't have any Car ESCs that are sensored, at least none listed on their website EVEN THOUGH there is a link for sensored car ESCs when clicked nothing is shown, no models listed. Also personally I have never seen a Turbo & Boosted ESC that wasnt sensored)
So anyway, Ai said:

"brushless ESC can have turbo settings even with a sensorless motor, but it works by estimating rotor position via back-EMF, making the timing less precise and potentially less powerful than with a sensored setup, though still effective for adding a speed burst on long straights in racing. The ESC uses algorithms to approximate the motor's RPM and position, allowing for programmable timing adjustments (boost/turbo) once running, though startup might be rougher"

With a description of Back EMF as follows:

Back-EMF Detection: In sensorless mode, the ESC detects the motor's back-EMF (voltage generated by the motor's rotation) to figure out the rotor's position, unlike sensored motors which use physical Hall effect sensors for exact positioning.

So im getting that some sensored escs with turbo and boost can work Turbo and Boost with unsensored motors , but unsensored ESCs wont have Turbo or Boost, but they sometimes have basic timing settings.

Stull, Im not buying it!
NOT what the eBay seller is selling anyways! 🤣

I had a 1/18 scale 25A sensorless ESC made around the same time I had my 1/10 scale ones made with a simple boost option and while at it I had it with a simple A.B.S. like brake option. I'm pretty sure any of the current ESC manufacturers can have such option programmed which is a very. I'm dumb and I had it done.