Since the electrical power is delivered directly to the armature of a dc motor via a commutator, it can also be referred to as a conduction motor. We now consider a motor in which the rotor receives ...

have relatively high maintenance require- ments because of the sliding brush/commutator interface, provide environmental problems because of sparking and carbon dust and are environmentally sensitive.

The commutator reverses the current direction flowing to the rotor wires ... but the most commonly seen in automotive applications are the permanently-excited magnet synchronous motor (PSM) and the ...