The world of Brushless motors can seem daunting to the beginner, with what seems like an endless array of options to choose from; motor size, number of turns, KV rating etc. There’s also another option that needs to be taken into consideration when choosing a Brushless Motor for your RC car, and that’s Sensored or Sensorless!

Venom Sensored Brushless Motor

Venom Sensored Brushless Motor - Rated at 6.5 Turns. The timing of this motor can also be adjusted further by rotating the end bell of the motor.

What Is A Sensored Brushless Motor?

A sensored brushless motor has the usual three wires connecting it to the ESC (Electronic Speed Controller), plus an additional cable that sends feedback to the ESC enabling the ESC to adjust its output to get the very best performance from the motor. In particular, this feedback enables better levels of control at lower speeds, giving a much smoother and precise throttle response. With a sensored system, the ESC will always know the exact position of the rotor and will adjust its output accordingly. This is most essential when racing.

Having this extra Rotor position information allows the ESC to apply power to the correct rotor phase immediately, ensuring that no cogging (jeryky stuttering) occurs off the line or when applying the throttle as you leave the apex of a corner. With a sensored motor arrangement, both the motor and the ESC will always be in perfect sync throughout the entire rev range.

What Is A Sensorless Brushless Motor?

Sensorless ESC and motor combinations are much simpler in design and work in a similar way to the brushed motor systems supplied with most standard RC cars. Sensorless ESCs just have 3 output cables that carry the power to the motor. The motor just then responds as demanded with no feedback being sent to the ESC. These systems are generally cheaper than Sensored versions and are most suited to leisure and bashing applications. In these situations, drivers tend to use full throttle more often and cogging isn’t as much of an issue. The main benefit of these systems is that they generate more torque than a sensored system.

Which Should You Run?

It really comes down to budget and application. If you’re going to race seriously, then sensored is the only way to go in my opinion. If you’re just going to be thrashing your RC car or truck at the local park or BMX track, then a sensorless budget system will still put a smile on your face.

As always, if you have any questions or comments regarding the content covered in this article, please feel free to join in the discussion below. :)

 

Tagged with:
 
About The Author

justin

I'm Justin, and I've been building & bashing RC Cars since 1987 when I got my hands on a newly released Tamiya Lunchbox! Since then picked up so many hints, tips and techniques I decided it was time to share them all with you...

6 Responses to Sensored vs Sensorless Brushless Motors

  1. Justin Noble says:

    Thanks for the Like Ronald Berry

  2. Nice guide as always Justin :)

  3. calvin remes says:

    hey thanks for the tips, on a few questions i had, im running the hpi vorza and hpi trophy truggy, i also like the way this site is orginized, easy to find the info im looking for!

    • justin says:

      Hey Calvin, Thanks for the kind feedback :) I’ve got lots more articles in the pipeline for 2012 but if you can thing of anything specific that you think I should cover, please let me know. Cheers, Justin

      • need as many tips and tricks as possible. First time rc owner, i have an exceed sunfire pro brushless edition. 60A ESC and 3300kv leopard brushless motor with a 3cell 5000mah 30c-60c skylipo hard case. any info or tips and tricks, PLEASE let me know via email or facebook.

        Thank you,

        Boris Golumenko

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Need Parts & Spares?

Spares for all makes of RC Car & Trucks at Discount Prices, including: Tamiya, Ansmann, HPI Racing, Kyosho, Axial, Team Associated & More

Looking for something?

Use the form below to search the site:


Still not finding what you're looking for? Drop a comment on a post or contact us so we can take care of it!