A 4 pole, lap wound dc motor has 540 conductor. Its speed is found to be 1000 rpm when it is made to run light. The flux per pole is 25 mWb. It is connected to 230 V dc supply. The armature resistance is 0.8 ohms calculate the induced e.m.f., armature current, Stray losses, and Lost torque.

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Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.