Analytical derivation and FEA validation of the inductances of CWPMM

The paper deals with the derivation of the inductances of permanent magnet synchronous machines equipped by distributed windings and those equipped by concentrated ones. A special attention is paid for the determination of the leakage inductances. A case study is considered where the stator magnetic circuit has the same geometrical parameters for both machines. The calculated inductances are compared to those yielded by FEA, which leads to a good agreement. The obtained results show that the concentrated winding machine has a direct inductance twice greater than the one of the distributed winding machine, which is of great importance for the extension of the flux weakening range.