Cited as a reference · for beginners
DC Motor, How it works?
Why people recommend it
Explains how a brushed DC motor works, including shunt and series field windings; cited as a straightforward reference in motor questions.
Watch for: series and shunt windings around 2:38
In their words
This inductor (the electromagnet) can be connect in parallel (shunt motor) or in series as explained here:
Lilás on electronics.stackexchange.com, Feb 2017. CC BY-SA.
This short video outlines how such a commutated motor functions, and leads me to the conclusion that it makes more sense for commutator bars that are offset 180 degrees to be connected by the rotor windings.
user6776314 on electronics.stackexchange.com, Mar 2018. CC BY-SA.