26-01-2018, 02:49 PM
That sounds very odd. Brush motors are not even vaguely synchronous. The one from a hoover would have been a universal series wound motor where the speed is very dependent on load. At zero load the speed tends to infinity.
https://en.wikipedia.org/wiki/Universal_motor
https://en.wikipedia.org/wiki/Universal_motor
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv







