[Dr_C2]

Good points Kevan,

What I would say many of us, including me, have spent a good few years discussing and debating the merits of brushless motors for digital slotcar racing. So now at last we are in sight of getting some track level data.

1/ I am keen to explore smooth low speed running as required for highly technical sections of digital tracks.

2/ I am also keen to explore acceleration and braking in the range of 1-10m/s which is relevant for typical digital raceways.

3/ I am also keen to explore acceleration and braking in the range 10-20m/s. This is for potential drag-strip digital competitions and as test vehicles for new digital system testing. Regarding the latter I am keen to explore ID reading at speeds well in excess of typical digital raceways.

I now have brushless motor and driver module configurations which look promising for all three of these above objectives.

In my above post I report on the 5500Kv motor running at 7.5V. I have quite a range of motor options as below (I chose colour coding to avoid confusions):

3500Kv (blue casing)
4500Kv (grey casing)
5500Kv (black casing)
6800Kv (red casing)

In each case the applied voltage will be limited to 7.5V not 12V.

Also I note that the 5500Kv motor is under stated by about 10%, i.e. it runs 10% faster than simple calculations would suggest. It looks like the motor magnets might be a little stronger than intended.

So far only one issue has come to light… the TI driver IC has a ‘motor stalled’ electronic cut-out. However when we lightly press a throttle controller, the motor is indeed stalled until the car starts to move. I believe this detail can be addressed in due course by careful firmware/software design.

c