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-   -   Speed control for syncronous motor (https://www.diyaudio.com/forums/power-supplies/164384-speed-control-syncronous-motor.html)

metalsculptor 29th January 2011 12:45 AM

Quote:

Originally Posted by cyclotronguy (https://www.diyaudio.com/forums/power-supplies/164384-speed-control-syncronous-motor-post2449841.html#post2449841)
1200 Watt motor at 25K rpm.... low vibration in a standard 3" cartrdge.... WOW! Where can I find such a thing?

Cyclotronguy

KB45-11XL 1000kv Brushless Inrunner motor at hobby king in HK, I am sure there are local suppliers of similar motors. As for balance I would check it myself for a grinding application. Cooling is a bit of an issue with these but in a grinding spindle application I was going to drill the end plates and run compressed air though the housing
Cooling might not be a problem at 50A, the RC guys run more like 90A making almost 4 times as much heat. It is not a standard 3" cartridge It is 45mm OD so it would fit nicely inside a 3" offset internal grinding spindle. Use 25V in to get roughly 25K rpm out with a standard controller known as an ESC.


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