Guru
Joined: 02/12/2009
Location: AustraliaPosts: 2539
| Posted: 03:10am 09 Jul 2010 |
Hi Trev
Thinking about the situation with your motor it could have been some residual copper particles or even carbon build up that gave a carbon track effect inside the motor as the high voltage DC likes to run where it shouldn't and als0 if there was any sparking on the new brushes it can cause very high voltage spikes to set it off, once it tracked it would self destruct.
High Gordon
I have a little 3 phase brush less motor for a model aircraft its 3" long and 2.5" diameter an out runner with the magnets in the outer case that revolves it makes 2+ HP according to the specs. It is so simple that there is nothing to go wrong, if it was scaled up it would be easy to make the only thing would be the cost of curved neo magnets. The armature is a simple laminated stack with single windings on each pole, once again easy to do, it would require a cooling fan cast alum a job for Trev. The controller is a standard A/C model device and use it to trigger a FET bank for the higher power.
Also would be a ripper alternator for a wind turbine.
What do you think
All the best
Bob
Foolin Around