Originally Posted by
Dave H
Brushed motors too. Frequently called cogging I believe.
Cogging happens at repeatable intervals as the shaft is turned, the same number of times each revolution, etc.
Kinda. Cogging is when a motor is starting up under low rpms and it bouces from forward and reverse or is very jerky. That is cogging.
But, yes, brushed motors do it too. Its the magnets in the rotors aligning to the heaviest area of the stators where the metal windings meet.
This creates the strongest magnetic forces, thus the strongest pull, or clunk, as the magnetic force 'grabs' onto the metal windings.
That is what an electric motor is made of, just brushed motors generally have very weak magnetic pull until its under load.
Where BL motors have it all the time.