It is similar to DC motors with Permanent Magnets. This motor comes under the category of DC brushed motors. These motors are used in Indian railways. The main drawback of DC series motor is high maintenance due to brushes and commutators. All these characteristics make it an ideal traction motor. The advantages of this motor are easy speed control and it can also withstand a sudden increase in load. It was the most widely used motor for traction application in the early 1900s. High starting torque capability of the DC Series motor makes it a suitable option for traction application.
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