The variation of the rotor speed of the series-wound and shunt-wound DC traction motors, depending on the axle load, is shown by the curves depicted in Fig.
The analysis of the speed-torque characteristics of the DC series--wound and separately excited shunt-wound traction motors at the points A and B allows us to state that the rotor speed of a separately excited shunt-wound traction motor is hardly dependent on the load (speed variation [DELTA][n.sub.1]), while speed variation [DELTA][n.sub.2] of a series-wound DC traction motor is much higher.
Wheel-to-Rail Adhesion of the Locomotives with Separately Excited Shunt-Wound and Series-Wound DC Traction Motors
The authors analyse wheel-to-rail adhesion for the locomotives using separately excited shunt-wound (characteristic 3) and series-wound (characteristic 2) DC traction motors (see Fig.
In 1882, his Pearl Street station in lower Manhattan used steam engines to drive shunt-wound
brush and commutator dc generators of the type that Thomas Davenport had invented 45 years earlier.