No/VOL: 09/2022 Page no. 302
Authors: Jakub Bernatt , Stanisław Gawron , Tadeusz Glinka , Tomasz Wolnik :
Title: Analysis of the benefits of using 6-phase windings in motors excited with permanent magnets
Abstract: The electric motors with the number of phases (m > 3) are dedicated to power supply from inverters. The article concerns permanent magnet motors with a 2 x 3-phase winding with a phase shift of 30º. The windings are supplied with 2 x 3-phase voltage temporarily shifted in relation to each other by the angle π/6=30º. Motors, in relation to the 3rd and 6th phase symmetrical winding, achieve a higher rated torque and compensation of harmonics of magnetomotive force (MMF) of the armature θμ for μ = 5, 7, 17, 19, 29, 31, which results in lower power losses, lower pulsations of the electromagnetic torque, lower magnetic noise and lower vibrations. Such motors are recommended primarily for use in servo drives.
Key words: 6-phase motors, permanent magnet synchronous motors, 6-phase windings, non-symmetrical 6-phase windings