Figure (in video) shows a 250V series dc mofor with compensating windings, and the total series resistance RA+Rs of 0.082. The series field consists of 25-turns per pole., with the magnetization curve show in Figure (in video). Find the speed and induced torque of this motor for when its armature current is 50A.

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DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.