Bob Mannix wrote:
"The Natural Philosopher" wrote in message
...
Dave Plowman (News) wrote:
In article ,
The Natural Philosopher wrote:
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.
No - it gets switched polarity DC. A different thing entirely.

NO, it is true alternating current in the meaning of the term. Current
that has an average value of zero, but has at any given time, a value that
is not zero.


Err no, it's *an* alternating current in *your* meaning of the term "True"
alternating current is that whis is assumed in AC theory and engineering and
in the design of AC motors and equipment and is sinusoidally varying.


Er, no, sinusoidal is not mentioned anywhere in the *definition* of AC.