A novel flux-switching permanent magnet machine with v-shaped magnets

Abstract

In this paper, firstly a novel 6-stator-coil/17-rotor-pole (6/17) flux-switching permanent magnet (FSPM) machine with V-shaped magnets, deduced from conventional 12/17 FSPM machines is proposed to achieve more symmetrical phase back-electromotive force (back-EMF), and smaller torque ripple by comparing with an existing 6/10 V-shaped FSPM machine. Then, to obtain larger electromagnetic torque, less torque ripple, and easier mechanical processing, two improved variants based on the original 6/17 V-shaped topology are proposed. For the first variant, the separate stator-core segments located on the stator yoke are connected into a united stator yoke, while for the second variant the stator core is a whole entity by adding magnetic bridges at the ends of permanent magnets (PMs). Consequently, the performances of the three 6/17 V-shaped FSPM machines, namely, the original one and the two variants, are conducted by finite element analysis (FEA). The results reveal that the first variant exhibits significantly larger torque and considerably improved torque per magnet volume, i.e., the magnet utilization ratio than the original one, and the second variant exhibits the smallest torque ripple, least total harmonic distribution (THD) of phase back-EMF, and easiest mechanical processing for manufacturing.

Analytical Modeling and Optimization of Partitioned Permanent Magnet Consequent Pole Switched Flux Machine With Flux Barrier

“…Different topologies of SFPMM topologies such as 𝜋-form core of stator [11], multi-tooth stator core [12], V-type core [13] and square envelope [14] are recently delineate. However, despite of the high PM volume usage, 𝜋-shaped stator is complex in manufacturing and assembling, upper apex of modulation pole of multitooth may saturate due to narrow width, V-shape associate mechanical and electrical loading at the base of support between the V legs whereas square envelop offer low torque density in compare with conventional SFPMM.…”

Multi-objective optimization of high torque density segmented PM consequent pole flux switching machine with flux bridge

“…  shape improves electromagnetic performance [9] but despite of more PM usage and leakage flux,   shape stator assembling, and manufacturing is complex. V-shape is considered with electrical and mechanical loading at supportive base of V legs [10,11]. The associated mechanical and electrical loading are overcome in square envelop however this design offered comparative lower torque density [12].…”

Analytical validation of novel consequent pole E‐core stator permanent magnet flux switching machine

“…Based on structure, FSMs are divided into inner rotor FSM [8], outer rotor FSM [9,10], dual rotor FSM [11,12] and dual stator FSM [13]. With main concern in simple robust inner rotor topologies, several designs are recently reported in literature including π-shaped stator [14], multitooth [15], V-shaped [16] and square envelope [17]. However, despite of the high PM volume usage, π-shaped stator is complex in manufacturing and assembling, upper apex of modulation pole of multitooth may saturate due to narrow width, V-shape associate mechanical and electrical loading at the base of support between the V legs, whereas square envelop offers low torque density in comparison with PMFSM.…”