Novel rotor design optimization of Synchronous Reluctance Machine for low torque ripple

Moghaddam, Reza-Rajabi; Magnussen, Freddy; Sadarangani, Chandur

doi:10.1109/icelmach.2012.6349952

Cited by 76 publications

(39 citation statements)

References 15 publications

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“…Much research has been done to improve the calculation speed and achieve high performances [3], [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. In this section, the conventional methods to optimize SynRM are classified as three types.…”

Section: Conventional Design Methodsmentioning

confidence: 99%

Design methods of transversally laminated synchronous reluctance machines

Cai

Shen

Hao

et al. 2017

Trans. Electr. Mach. Syst.

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Section: Conventional Design Methodsmentioning

confidence: 99%

Design methods of transversally laminated synchronous reluctance machines

Cai

Shen

Hao

et al. 2017

Trans. Electr. Mach. Syst.

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“…An effective dimensioning and positioning of iron ribs can significantly influence torque ripple, as described for instance in [8], where design rules dedicated to torque ripple minimization are presented, based on the concept of virtual ribs and proper choice of the number of stator slots and rotor ribs. This concept has been further analyzed in [9], where slightly different geometries have been considered. Other effective techniques, based on proper choice of the angle span for each flux barrier, including also mixing of different geometries in rotor sections or poles, have been proposed in [10] and [11].…”

Section: E Torque Ripplementioning

confidence: 99%

Electromechanical trade-off analysis of PM-assisted Synchronous reluctance motors

Castagnini¹,

Curci²,

Termini³

2015

2015 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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Current industrial trend shows a growing care towards energy efficiency. Some rotor technologies, such as Synchronous Reluctance and PM-assisted Synchronous Reluctance, are revealing their potential for sustainable costs and environmental safety. These technologies use very high saliency designs with large empty parts in rotor lamination, leading to small highly stressed mechanical parts in the rotor structure ("bridges" or "ribs"), whose dimensions in turn affect performance. Aim of this work is a trade-off analysis of electromechanical design for PM-assisted Synchronous Reluctance motors, investigating different configurations and strategies for iron bridge sizing.

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“…1a, is created by implementing straight lines to create the flux barriers. Examples of these are presented in [3] and [6]. The second topology, (b), is created by implementing circles to generate the respective flux barriers with examples provided in [2], [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Flux Barrier and Skew Design Optimization of Reluctance Synchronous Machines

Howard

Kamper

Gerber

2015

IEEE Trans. on Ind. Applicat.

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In this paper an investigation into an alternative topology for reluctance synchronous machine rotor flux barriers is presented. The investigated topology employs a high number of flux barrier variables with an alternative asymmetric rotor structure. The focus in the paper is on maximising average torque and minimising torque ripple, using finite element-based design optimisation, in order to study the possibility of achieving acceptably low torque ripple. A subsequent investigation into the effect of rotor skew on the proposed optimised design to reduce torque ripple even further is also conducted, as well as the manufacturing and testing of the proposed flux barrier prototype. I. INTRODUCTIONWith the increasing emphasis on efficiency and cost reduction, the interest in reluctance synchronous machines (RSMs) has grown during the past decade. This interest is driven by not only the robustness, efficiency and simplicity of RSMs, but also by the fact that the cost of rareearth magnets is increasing and their market stability is decreasing.The main focus of most RSM design optimisation, depending on application, is on maximising average torque (T A ), within the limits of an allowable volume, and minimising torque ripple (T R ). The latter is conventionally achieved by rotor skewing and stator cording in order to reduce the air-gap harmonics that produce a high T R . In this paper, the possibility of both maximising T A and minimising T R without implementing rotor skew techniques to achieve acceptable T R values is investigated. A further investigation into the effect of rotor skew on the proposed topology to reduce T R values even further is also presented.A large part of the design of RSMs is focused on the rotor creation, and more specifically the type of flux barrier topology and its creation procedure. With the latter in mind, two creation techniques are summarised by Vagati [1], the first of which implements generalised lumped-parameter modelling of the rotor magnetic circuit and the second, a numeric design optimisation of a rotor flux barrier structure.The second procedure is implemented in this research. This procedure is based on a predetermined basic barrier structure with a fixed number of variable parameters, such as barrier tip angle and barrier width. These parameters are numerically optimised by implementing a finite element method (FE) package that calculates each iteration's relevant machine performance parameters, for example torque and torque ripple. Examples of this design procedure can be found in [2]-[5]. The advantage of this approach is that the optimisation inherently takes complex phenomena, such as torque harmonics and cross saturation, into account.In RSM design, three basic rotor topologies have emerged with combinations and small variations between specific

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Novel rotor design optimization of Synchronous Reluctance Machine for low torque ripple

Cited by 76 publications

References 15 publications

Design methods of transversally laminated synchronous reluctance machines

Design methods of transversally laminated synchronous reluctance machines

Electromechanical trade-off analysis of PM-assisted Synchronous reluctance motors

Asymmetric Flux Barrier and Skew Design Optimization of Reluctance Synchronous Machines

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