... .strong durability of commutator 3.reasonable structure The series dc motors' feature:1. carbon brush easily ... teeth male splineUse and Maintenance Manual for ZC series of DC Traction Motor A.The motor is ... B.Structure of Motor1. The motor is a series excited DC motor, mainly comprising a stator, rotor, ... 6. Under the idle load state, the motor (Series excited) cannot be allowed to be powered and operate ...