*2.3.3. Analytical design of MGs through vector potential algorithm*

The vector potential expressions, in both air gaps of the MG, have been detailed for radial and axial flux topologies in [28, 41]. Since the mathematical modeling for such an approach is quite laborious and goes beyond the scope of this state-of-the-art presentation of MGs, it will not be presented here. (It's worth mentioning that even the integral coefficients are detailed in the previous references; thus, the reader can investigate this topic if needed.)

With this, we have concluded a short presentation on the available analytical models used in the design of process of MGs. Next, we will consider two of the available configurations to evaluate their performances (in terms of iron loss and torque) and we will rapidly investigate the influence of certain materials used in the construction of MGs.
