Analytical Modeling and Optimization of Pseudo-Direct Drive Permanent Magnet Machines for Large Wind Turbines

Penzkofer, Andreas; Atallah, K.

doi:10.1109/tmag.2015.2461175

Cited by 28 publications

(22 citation statements)

References 26 publications

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“…The methodology which has been employed to develop the analytical technique for the prediction of the flux density distributions in the airgaps and PM regions of MGs and PDDs with PM excitation on HS rotor and stator [7], [8], [9], is adopted for the development of the analytical model for the prediction of the flux density distribution in the airgap and PM regions of the coil excited PDD. The effects of the stator and the HS rotor windings are accounted for by currents sheets on the stator iron bore diameter and the HS rotor outer diameter, respectively.…”

Section: Analytical Modelmentioning

confidence: 99%

“…Although finite element (FE) analysis may enable an accurate analysis of the PDD it also could require in a significant computational effort. An analytical model has been proposed in [7]- [9] for the prediction of the flux density distribution in the PM and air regions of PDDs with HS rotor PM excitation. In this paper an analytical model for the prediction of the flux density distributions in the air spaces and PMs of a PDD with coil excited HS rotor is presented.…”

Section: Introductionmentioning

confidence: 99%

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Coil Excited Pseudo Direct Drive Electrical Machines

et al. 2017

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A Pseudo Direct Drive (PDD) equipped with a coil excited high-speed (HS) rotor is presented. An analytical model which predicts the flux density in the air spaces and permanent magnets (PM) of the PDD is presented, and it is shown, that a good agreement exists between the analytical and finite element (FE) predictions. Furthermore, the model is employed to investigate the effects of the key design parameters on the performance of a coil excited PDD for a 10MW wind turbine application and an optimised design is proposed. It is shown that shear stress in excess of 100kPa can be achieved, and that compared to a PM excited PDD a reduction in PM mass can be realized. It is also shown that the efficiency over the operating range of the wind turbine can be maximized by adopting an appropriate control strategy of the HS rotor excitation currents.

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Section: Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coil Excited Pseudo Direct Drive Electrical Machines

et al. 2017

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“…Besides the above topologies, more singular SM have been modeled by the subdomain technique. For instance, SDMs exist for flux switching SM [32], double excitation SM [33], axial flux SM [29], PMSM with noches [34], pseudo direct drives SM [35] and Switch Reluctance Motor (SRM) [36]. The SRM model illustrates the difficulties to transform any geometry into a polar one.…”

Section: ) Synchronous Machines (Sm)mentioning

confidence: 99%

A review of subdomain modeling techniques in electrical machines: Performances and applications

Devillers

Besnerais²,

Lubin

et al. 2016

2016 XXII International Conference on Electrical Machines (ICEM)

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This paper reviews the recent developments of semi-analytical subdomains modeling techniques to compute the flux density distribution in electrical machines by the exact solving of Maxwell equations. It is shown that with an appropriate development methodology and numerical implementation, these harmonic models break the traditional compromise between accuracy and computation time that must be done using finite element or other analytical methods. Besides that, subdomains model development techniques have been improved to overcome its topological limitations This fact is demonstrated on three different subdomains models in comparison with finite element methods in terms of accuracy and processing time. The first one is a subdomains model of a surface permanent-magnet synchronous machine, the second one is for an inset permanentmagnet synchronous machine, and the third one is for a squirrelcage induction machine. Thanks to an efficient implementation method, a very low computation time is obtained. The robustness of the subdomains on the geometrical assumptions is also demonstrated.

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“…Various 2-D analytical models have been presented for different types of electrical machines such as rotary with inner rotor [18,22,23,25], [27][28][29][30][31][32][33][34][35][36][37][38][39][40] or outer rotor [21,24,41], planar [42] and axial machines [43], to obtain electromagnetic quantities such as electromagnetic torque or force, inductances, induced voltage and core losses [21,29,31,39]. In some papers, the presented 2-D analytical models are employed to optimally design an electric machine [23,32,35].…”

Section: Introductionmentioning

confidence: 99%

General Analytical Magnetic Model for Partitioned-Stator Flux-Reversal Machines With Four Types of Magnetization Patterns

Vahaj¹,

Rahideh²,

Lubin³

2019

IEEE Trans. Magn.

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 Abstract-A Partitioned Stator-Flux Reversal Permanent Magnet Machine (PS-FRPMM) is a new combination of a stator PM machine and a magnetically geared machine and has the specifications of both machines in terms of robust structure and torque density. In this paper a comprehensive 2-D analytical model is developed for PS-FRPMM based on subdomain technique. The presented model has the capability to accurately and quickly investigate the effects of design parameters on the machine performance. The 2-D analytical model is evaluated on two case studies with 12 stator teeth and 10 rotor poles, and 18 stator teeth and 13 rotor poles, with four different magnetization patterns. The influences of various design parameters such as the rotor slot width, slot opening width and the segment ratio of the PMs in the 2-segment magnetization pattern have been investigated on the quantities such as the instantaneous torque, torque ripple, Unbalanced Magnetic Force (UMF) and Electromotive Force (EMF). For evaluating the presented analytical model, 2-D Finite Element Method (FEM) with and without saturation effects has been used. The comparative study between the analytical and numerical models shows good agreement. Finally, a 3-D FEM has been used and the results of 2-D analytical model and 3-D FEM are compared in term of the accuracy and computational time. The results show that the presented model has lower computational time compared to the 2-D and 3-D FE method, while its accuracy is acceptable under different circumstances such as saturation.

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Analytical Modeling and Optimization of Pseudo-Direct Drive Permanent Magnet Machines for Large Wind Turbines

Cited by 28 publications

References 26 publications

Coil Excited Pseudo Direct Drive Electrical Machines

Coil Excited Pseudo Direct Drive Electrical Machines

A review of subdomain modeling techniques in electrical machines: Performances and applications

General Analytical Magnetic Model for Partitioned-Stator Flux-Reversal Machines With Four Types of Magnetization Patterns

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