I am currently planning a 3d POV display. At the moment I am stuck at what motor I should use. I need at least 1800rpm - but not more than 2500 because of instability. I need a powerfull enough motor that has the correct torque at the same time. So far I havnt found any matching brushed dc motor - some are spinning to fast - ohters are too weak. (need good bearings bulid in)
My other solution would be a brushless motor. I would control it with an rc ESC together with an 555 or an Arduino (would be no problem). But my main conecrn is, that allmost all brushless motors need ALOT of current - I dont need more than 50W of constant power. My Power supply will be 9V. I am afraid that the brushless motor will have too less torque when running at 2000rpm.
Are there any brushless motors which are suitable for me? I have looked almost everywhere and all these brushless rc motors take 20A and up - I dont want to lift my 3dpov up - it just needs to spin fast enough.
I have also found out that the "kv" rating belongs to RPMs per Volt so woth a 9V power supply I need a small 200kv brushless motor with not more than 70W power output. If you know a place where I can gat something like that or any alternative - I would be really happy!
By the way: An Atmega328 is sitting in the spinning 3DPOV. It uses a hall effect sensor to sync. It has build in different features, which i want to switch while running. As far I am planning to vary the RPMs to tell the arduino which programm he has to run.
Best regards, Max