Electromagnetic Analysis of a Synchronous Reluctance Motor With Single-Tooth Windings

Use of fractional‐conductor windings and semi‐magnetic slot wedges in synchronous machines

“…A number of special windings have been considered in electrical machines, among the most popular at present is the fractional slot‐concentrated winding or single‐tooth winding [7]. These are not employed in synchronous generators for many reasons, such as the increased harmonic content in the air gap [5]. Another type of winding is a variation of the conventional distributed winding, the fractional conductor winding is a distributed winding scheme that does not constrain mean number of conductors per slot to a positive integer [4], it is very similar in construction (end windings and assembly) to conventional distributed windings where all coil sides have the same number of conductors.…”

“…There are commercially available semi‐magnetic slot wedges [5]. These wedges have >1 relative permeability in the range 2 ≤ μ r ≤ 10 and have been shown in single‐tooth wound synchronous reluctance motors to reduce the harmonic content in the air gap by modulating the flux density wave via the permeances.…”

“…The use of fractional conductor windings has received little attention in the literature with the few studies that exist showing positive results [4]. Semi‐magnetic wedges have also been subject to some study but are lacking widespread adoption despite their apparent benefits [5]. This paper explores these two technological advances in both application contexts and seeks to demonstrate the usefulness of those technologies, while discussing challenges to their adoption.…”

Optimal Pole Number and Winding Designs for Low Speed–High Torque Synchronous Reluctance Machines

“…PMSMs for these applications, but they are not for SynRMs. Only a few examples for SynRMs can be found in the bibliography [9][10][11][12][13][14][15], but they have not been investigated together, or have evaluated different winding types for a specific application. Consequently, the objective of this paper is to study the feasibility of SynRMs for low speed applications.…”

Sub-Optimal Second-Order Sliding Mode Controller Parameters’ Selection for a Positioning System with a Synchronous Reluctance Motor

“…The SynRM can be used in different industrial and home applications, as well as a propulsion system in hybrids and electrical vehicles [4]. Various researches over the decade were made to refine the motor torque performance, with a different design of the rotor shape and various multi-phase arrangements [5][6][7][8][9]. There were also many SynRM's presented, which exploit the synchronous principle of the operation, which are often related to the rotor angle estimation, where the physical sensor is removed [10].…”