QUOTE I suspect there is no motor that can compete with it using 1 amp power supplies.
Hi Tropi,
unless I'm drastically wrong, that motor will be drawing far more than 1 A most of the time
My understanding is that the figure on motor stickers is the no load current, which is nearly useless. A motor will draw max amps when it's stalled - for the Scaleauto, armature resistance should be no more than 3 Ohm , so 12 V/3=4 A (assuming the power supply can churn them out without sagging)
As revs go up, the current decreases linearly down to the no load value
Very roughly, a slot car motor should operate in the middle third of the range, so the Scaleauto would be drawing between 2.6 A (accelerating out of a turn) and 1.3 A (max speed down the straight)
That said, I cannot understand why nobody measures current draw these days - that's the real indication of the energy put into play, and can be done with a cheapo multitester
Ciao
Beppe
Hi Tropi,
unless I'm drastically wrong, that motor will be drawing far more than 1 A most of the time
My understanding is that the figure on motor stickers is the no load current, which is nearly useless. A motor will draw max amps when it's stalled - for the Scaleauto, armature resistance should be no more than 3 Ohm , so 12 V/3=4 A (assuming the power supply can churn them out without sagging)
As revs go up, the current decreases linearly down to the no load value
Very roughly, a slot car motor should operate in the middle third of the range, so the Scaleauto would be drawing between 2.6 A (accelerating out of a turn) and 1.3 A (max speed down the straight)
That said, I cannot understand why nobody measures current draw these days - that's the real indication of the energy put into play, and can be done with a cheapo multitester
Ciao
Beppe
