Outer Limits 4x4 Board

I was looking at a winch motor picture the other day and the thought occurred

Series Wired, 3 Terminals, 4 Brushes - hmm - how the *@#$ is this thing wired internally.

A series wound motor will always spin in the same direction irrelevent of which way the power is connected. That's why they use them in AC devices. The way to make them spin backwards is to change the angle between the brushes and the stator (from memory - TAFE was 10 yers ago).

So does that mean they only use 2 of the brushes in each direction?
I thought they would be using all 4 for power.
Further, does that mean all the stator coils are energised in both directions.

Paul

4 terminals : -

Earth

Armature

Field1

Field2

... (if I remember correctly)

as kris said, 4 terminals.
to operate the winch. earth is always earth.
the solenoids apply 12volt to one of the fields (field 1) and joins the other field(field 2) and the armature together
for reverse 12 volt goes to field 2. armature and field1 get joined.

how that works internally i've no idea. Tafe was to long ago to remember.