Hence , the traction motors will produce their highest torque , causing the locomotive to develop maximum tractive effort , enabling it to overcome the inertia of the train .
Torque in a series - wound motor is approximately proportional to the square of the current .
The traction motors will produce their highest torque , causing the locomotive to develop maximum tractive effort , enabling it to overcome the inertia of the train .
Torque in a series - wound motor is approximately proportional to the square of the current .