Methods to Improve the Harmonic Composition of the Magnetic Field in Electric Machines with Fractional Slot Winding

• Published in: Russian electrical engineering Vol. 92; no. 6; pp. 320 - 325
• Main Authors: Babitskii, D. Yu, Toporkov, D. M., Pristup, A. G., Temlyakova, Z. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2021; Springer Nature B.V
• Subjects: Coils (windings); Composition; Engineering; Harmonics; Machines; Magnetic fields; Manufacturing; Processes; Winding; magnetomotive force harmonics; finite-element analysis; fractional slot winding; electric machine with permanent magnets
• ISSN: 1068-3712; 1934-8010
• DOI: 10.3103/S1068371221060079

A specific feature of fractional slot windings is the harmonic composition of the magnetic field that contains a number of nonworking harmonics having adverse effects. We consider methods to improve the harmonic composition of the magnetic field in electric machines with fractional slot windings. A description of designs in which these methods are implemented is provided. Their efficiency is studied using a unified model of the electric machine with a winding in which the number of slots per pole per phase is
q
= 2/5. The considered approaches to improving the harmonic composition of the magnetic field of fractional slot windings are compared with each other and with the standard fractional slot winding.