[Dr_C2]

A little bit more chat, while the brushless driver board is designed behind the scenes.

So given the range of sensored 1525-sized brushless motors available (3500-6800Kv in my case) why the interest in ‘sensorizing’ the Slot.it motors too?

The answer lies in the Kv rating of the motor and the maximum operating voltage.

The 1525-sized sensored motors are designed for battery operation in radio controlled cars where a two cell LiPo is used. Hence the maximum operating voltage is around 8V (a single LiPo cell is 3.7V). My slotcar design point is 7.5V which for a 3500Kv motor corresponds to 26,000 rpm at full throttle. To maintain compatibility with the 12V SSD track system this requires the inclusion of a tiny buck converter module onto the main decoder board. This is fine but not a perfect solution.

If the Slot.it motor can include a sensor ring pcb with three embedded SMD Hall sensor ICs, each at 120 degrees separation … that would be a more elegant solution. These motors are of course 12V compatible and have a rating of 2000Kv which corresponds to 24,000rpm at full throttle.

Both potential solutions put the motor rpm range in line with typical hi spec brushed slot car motors. Both approaches are of interest here.

BTW this thread is a simple narration between hobbyists as the ‘art-of-the-possible’ is explored regarding sensored brushless motors for digital slotcars. On this basis I hope the thread provides some entertainment/interest to fellow slotcar enthusiasts :)

c