Hi! Why most mobile platform use brushed dc motor? I thought brushless is more powerful,lighter and less maintenance. Almost all R/C cars, helis, planes use brushless motor but when I searched for robotics 4wD and 6WD, all of them use brushed.
RC brushless motors lose lock below a certain speed and can't be made to change direction or hold postion
under load. Industrial sensored brushless motors do this well but are typically very expensive. Also RC
brushless are optimized for low duty cycle extreme high power operation and most require lots of air or
water cooling.
Brushless motors are excellent for spinning propellors, where the starting torque of the load is low. They are generally poor at driving wheels, where the starting torque tends to be high.
Make that read "sensorless brushless motors"...