In electric motors, with respect to the construction and materials used, the following factors determine the performance of electric motors: The plates are made from ferromagnetic materials or iron and magnetic steels, 1HP 56C motor as these are ferromagnetic materials of high magnetic permeability. In electric motors, the higher the magnetic permeability of the nuclei, the smaller the magnetic field in the nuclei, and the greater the field strength in the air gap. We observed that the electromagnetic torque (torque) developed in the electric motors is proportional to the magnetic flux density in the air gap.
The magnetic materials of the motor cores must have high induction of saturation, thus allowing the motor to work at a high magnetic flux point, always below the saturation point. We use low carbon steel, because this is a soft magnetic material, and presents little coercivity. The hysteresis loss is proportional to the area of the hysteresis cycle, which mathematically represents an energy density. Therefore, the narrower the hysteresis cycle, the lower the coercivity, and the lower the loss per hysteresis cycle. Therefore, stator and rotor cores of electric motors built with higher magnetic permeability materials, result in motors with superior performance.