Fred wrote:
"The Natural Philosopher" wrote in message
...
Fred wrote:
"The Natural Philosopher" wrote in message
...
Fred wrote:
"The Natural Philosopher" wrote in message
...
The commutator is to ensure the field
in the rotor is aligned wrt the stator to provide continuous torque.
Not sure where you get 3 phase from.
Each winding gets an AC signal. Each winding is switched at 120 degrees
phase to the next one: If I told you that and told you nothing else,
you would say 'ah, a 3 phase AC motor!!'

With 3 brushes equally spaced I suppose?
No, three commutator segments spaced equally.

Most motors have far more than 3 commutator segments!


Depends. Most cheap ones have three. Larger motors have more, but
generally at least 5 are in contact with the brushes at any time.