Modelling and performance of three‐phase 6/14 pole flux reversal machine

More, D. S.; Fernandes, B. G.

doi:10.1049/iet-epa.2012.0058

Cited by 23 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these machines, FRMs are analyzed with the combination of this concept and the conventional PM synchronous machine (PMSM) analysis methods. The d-q model of FRMs was developed in [5] based on the PMSM model and electrical gear concepts, where the power density of FRMs was increased with full pitch winding. In [6,7] a subdomain model was developed for no-load and on-load magnetic field distribution calculation.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of a flux reversal permanent magnet machine as a wind turbinegenerator

Ghasemian¹,

Tahami²,

Nasiri‐Gheidari³

2020

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

Flux reversal permanent magnet generators are well suited for use as wind turbine generators owing to their high torque generation ability and magnetic gear. However, they suffer from poor voltage regulation due to their high winding inductance. In this paper, a design optimization method is proposed for flux reversal generators in wind turbine applications. The proposed method includes a new multiobjective function. Cost, volume of the generator, and mass of the permanent magnet are considered in it independently and simultaneously. Besides the new objective function, the main superiority of this paper compared with published papers is considering winding inductance in optimization procedures as a constraint and analyzing the optimization results for different values of it. Also, for the first time, the equations for permanent magnet sizing are considered based on a demagnetization curve for designing a flux reversal generator. For this purpose, a step-by-step design procedure is proposed and sensitivity analysis is performed to determine the sensitivity of output parameters to specific electrical loading, the height of the permanent magnets, and the machine length-to-diameter ratio. Then a multiobjective optimization based on a genetic algorithm is carried out and the best combination of pole number and number of slots/pole/phase is obtained. Then, for this combination, the optimum value of the constraint is obtained, too. Then specifications and dimensions of the optimum flux reversal machine as a wind turbine generator is presented. Finally, a time-stepping finite element method is used to validate the design and optimization results.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimal design of a flux reversal permanent magnet machine as a wind turbinegenerator

Ghasemian¹,

Tahami²,

Nasiri‐Gheidari³

2020

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

show abstract

“…From the previous literature, it is easy to find that most research studies on SSPM machines are focused on machine dimension optimizations [8][9][10][11][12][13][14][15][16][17][18], especially on cogging torque reduction [13][14][15][16][17][18] and general design procedures that should be considered during the preliminary design stage [19][20][21][22][23][24][25][26]. In [8,19], the design procedures are proposed to guide the engineers how to optimally choose the key dimensions, including slot/pole combination, stator inner radius, air-gap length, electric loading, etc.…”

Section: Introductionmentioning

confidence: 99%

Comparison of stator‐ and rotor‐surface‐mounted PM brushless machines

Zhu

Wang

et al. 2019

IET Electric Power Applications

View full text Add to dashboard Cite

Flux-reversal permanent magnet (PM) machines can be considered as stator-surface-mounted PM (SSPM) machines, where normally a pair of magnets with reversal magnetization polarities is mounted on the surface of each stator tooth. Hence, the SSPM machines and the conventional rotor surface-mounted PM (RSPM) machines are rather similar since both machines house the PMs in the air-gap, and the only difference is the location of magnets in the stator side and rotor side, respectively. In this study, a comparative study between SSPM and RSPM machines is conducted to investigate the difference including topology, operation principle and performance. First of all, the topology of both machines is compared. Then, the operation principle in both machines is analysed based on the air-gap field modulation theory. Correspondingly, the characteristics of flux density harmonics either due to PMs or armature reaction are obtained. Therefore, the harmonics that make contribution to back-electromotive force and rated torque are quantified. Besides, other electromagnetic performances, e.g. overload capability, flux weakening ability and loss distribution are also evaluated. Finally, a 12/14 prototyped SSPM machine is manufactured and tested to verify analytical and finite element method-based prediction.

show abstract

“…Although the efficiency and power density of PMS motors are much higher than those of LIMs, the initial cost of such motors is considerable, especially when the long on-rail stator involves armature winding or permanent magnets (PM). Thus, linear doubly salient PM (LDSPM) motors with both winding and PMs on the mover have gained more attention in recent years [2][3][4][5][6][7][8][9]. Doubly salient machines have been suggested to incorporate the advantages of switched reluctance (SR) and PM machines [10,11].…”

Section: Introductionmentioning

confidence: 99%

Cogging force mitigation techniques in a modular linear permanent magnet motor

Tootoonchian

Nasiri‐Gheidari²

2016

IET Electric Power Applications

View full text Add to dashboard Cite

Modular linear doubly salient permanent magnet motors are well adapted to linear propulsion systems because of their distinct characteristics, such as high efficiency and power density, reduced maintenance and initial cost, low noise and permanent magnet (PM) leakage flux, and fault tolerance capability. However, such motors suffer from high cogging thrust. In this study, various techniques based on previously proposed methods for PM machines are applied on the studied motor and evaluated by using non-linear three-dimensional time-stepping finite element analysis; three novel, optimised techniques are then presented. The techniques presented are based on the minimisation of the variation in air-gap reluctance relative to the displacement. The PM volume and average air-gap length are kept constant in all optimisations. Since the average thrust and thrust ripples under load condition may be affected by cogging reduction techniques, these values are presented for all given techniques. The results show that the proposed techniques not only maintained the average thrust under various loads but also significantly suppressed the thrust ripples for different average thrusts and cogging forces.

show abstract

Modelling and performance of three‐phase 6/14 pole flux reversal machine

Cited by 23 publications

References 19 publications

Optimal design of a flux reversal permanent magnet machine as a wind turbinegenerator

Optimal design of a flux reversal permanent magnet machine as a wind turbinegenerator

Comparison of stator‐ and rotor‐surface‐mounted PM brushless machines

Cogging force mitigation techniques in a modular linear permanent magnet motor

Contact Info

Product

Resources

About