what type of dc motors used in electric trains and why?what are the advantage of dc motors ?

Question by vijay a: what type of dc motors used in electric trains and why?what are the advantage of dc motors ?
i wish to know more about dc motors and its applications in electric train applications

Best answer:

Answer by mike p
DC motors are easyer to contron torque and speed by varying the power to armature and field leads. And in braking conditions, they actually turn into generators putting energy back into the grid.

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