On Sun, 4 Oct 2015 16:01:15 -0400, Bob wrote:

Hello,

Not a motor expert, but just very curious, and would like to learn.

Have a home food blender. Works on regular wall outlet.

Motor has armature windings.
Also has field (stator) windings.

Also has a commutator.

What kind of a motor is this ?

Advantages of a motor like this compared to perhaps a regular ac
induction motor ?

Have never seen a commutator on an ac motor before.
Is there a rectifier hidden somewhere ?

Thanks,
Bob
This is a "universal" motor. It will run on AC or DC. This is
possible because it has a wound fiels - the polarity of both rotor and
field change together. A permanent magnet motor can NOT run on AC
because the field can't switch polarity - the motor just buzzes.

Universal motors have the brush angle a bit different than straight DC
motors to reduce brush sparking/burning - but they are fundamentally
the same.