Originally posted by Joit
View Post
BTW, top speed of a motor has nothing to do with the efficiency of the motor. I realize the SG isn't used as a motor, but the principal still applies. Speed has to do with back EMF induced into the stator coil by the passing magnet. This would decrease with a wider gap and consequently the speed would increase.
This is also why an increase in voltage increases the speed. The rotor has to travel faster in order to generate enough BEMF to equal the voltage level in the stator.
Leave a comment: