The purpose of this paper is the calculation of Unbalanced Magnetic Force (UMF) in permanent magnet brushless DC (PMBLDC) machines with diametrically asymmetric winding and investigation of UMF variations in the presence of phase advance angle. This paper presents an analytical model of UMF in surface mounted PMBLDC machines that have a fractional ratio of slot number to pole number. This model...

A novel modular-stator outer-rotor flux-switching permanent-magnet (MSOR-FSPM) motor is proposed and studied in this paper. Structure, operation and design principles of the MSOR-FSPM motor are introduced and analyzed. Considering that the combination of different pole number and slot number has a great influence on the motor performance, the optimum rotor pole number for the 12-stator-slot MSO...

In this paper, a six-phase fault-tolerant modular permanent magnet synchronous machine (PMSM) with a novel 24-slot/14-pole combination is proposed as a high-performance actuator for wheel-driving electric vehicle (EV) applications. Feasible slot/pole combinations of the fractional-slot concentrated winding six-phase PMSM are elicited and analyzed for scheme selection. The novel 24-slot/14-pole ...

In this study, a magnetic field is analyzed using an analytical method and compared with the electromagnetic characteristics of 8-pole 9-slot 12-slot permanent magnet synchronous machines considering rotor eccentricity. The flux density back electromotive force (EMF) are derived perturbation theory theory. First, Fourier modeling performed through magnetization modeling, two analysis regions se...

The zero-sequence inductance is a vital parameter for the performance analysis of permanent magnet machines, especially under faulty conditions or in open-winding machines. This paper focuses on calculation fractional slot concentrated winding synchronous machines (FSCW-PMSMs), and reveals variation regularity this kind its various components against pole/slot combinations, using function finit...

This paper presents a novel torque equation to predict the harmonic characteristic of an interior permanent-magnet synchronous motor (IPMSM). The procedure for establishing proposed is as follows. First, we classify origins torque, phase, and slot harmonics. harmonics are then analyzed study relationship between generated in N S poles magnet. Second, establish consisting two terms phase In part...

The rapidly increasing demand on power density levels of electric vehicle (EV) drive systems is pushing the boundaries traction motor performance. Hairpin windings are becoming a popular option for EV motors due to their reduced dc losses and improved heat dissipation capability when compared traditional random windings. In this article, comprehensive design approach hairpin winding layouts fir...

This article investigates some novel modular consequent pole PM machines (CPMs) with E-core and C-core stators. Different slot-pole number combinations including 12-slot/10-pole ( Ns>2p ) 12-slot/14-pole xmlns:xlink="http://www.w3.org/1999/xlink">Ns<2p have been investigated. Their st...