[Dr_C2]

I’ve been bench testing a 5500Kv sensored brushless motor.

Set to 7.5V DC and a suitable sensored drive module it spins at 760 revs per second. This corresponds to 45600 rpm.

The motor runs extremely smoothly and draws about 0.36A at this speed unloaded. And of course there are no sparks whatsoever!

This compares favourably with my King 46k EVO brushed motors which have significant vibration and quite a lot of sparking from the commutator at similar speeds of rotation.

The hardware circuit schematic for a matching sensored brushless driver module has now been designed and tested. The design is ready for pcb layout. This board will be small with a low component count and will piggy-back directly onto the motor.

BTW, ignoring loading effects, a motor running at 45,600 rpm via 13:31 gearbox onto 20mm diameter wheels corresponds to a theoretical speed of 20m/s. Loaded track speed to be determined in due course ;)

c