New theoretical approach to the synchronous reluctance machine behavior and performance

Moghaddam, Reza Rajabi; Magnussen, Freddy; Sadarangani, Chandur; Lendenmann, H.

doi:10.1109/icelmach.2008.4799845

Cited by 17 publications

(8 citation statements)

References 11 publications

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“…As described in literature, i.e. [4,5], higher the total thickness of air along the d-axis of Fig. 1a, higher the average torque.…”

Section: Torque Computationsupporting

confidence: 75%

“…The PMAREL and REL machines are characterised by a complex rotor structure (as shown in Fig. 1a) that often is modelled by means of an analytical model, as widely presented in literature [3][4][5][6]. The desired anisotropy is usually achieved by means of several flux barriers per pole.…”

Section: Introductionmentioning

confidence: 99%

“…The desired anisotropy is usually achieved by means of several flux barriers per pole. While the number of flux barriers mainly affects the torque generation [1,4], the opening angle of the flux barriers mainly affects the torque profile, e.g. the torque ripple [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Low‐torque ripple design of a ferrite‐assisted synchronous reluctance motor

Barcaro¹,

Pradella²,

Furlan³

2016

IET Electric Power Applications

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This study illustrates the design of a low-torque ripple ferrite-assisted synchronous reluctance machine. The design strategy initially adopts a simplified analytical model in order to select the optimal values for the flux barrier angles that mainly affects the torque ripple. Then, synchronous reluctance rotor geometries selected on the basis of analytical results are analysed by finite elements (FEs) simulations. The simulated geometries are provided by ferrite permanent magnets (PMs) to enhance machine performance. The optimisation steps are properly coordinated in order to realise the maximum reduction of the torque ripple, taking into account the PM quantity and the flux barrier shape as well as the demagnetisation risk. Two optimal rotor geometries are presented and compared in terms of torque ripple by FEs simulations. Then, the comparison have been extended to other machine characteristics (as highfrequency saliency and demagnetisation tolerance) to the aim of selecting the more promising one. Available measurements on prototypes are reported to confirm the simulation results and the design approach.

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“…As described in literature, i.e. [4,5], higher the total thickness of air along the d-axis of Fig. 1a, higher the average torque.…”

Section: Torque Computationsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low‐torque ripple design of a ferrite‐assisted synchronous reluctance motor

Barcaro¹,

Pradella²,

Furlan³

2016

IET Electric Power Applications

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“…1. First of all, it is well known that low pole numbers are recommended to obtain a high saliency ratio [6,8,[17][18][19][20][21][22][23]. 2.…”

Section: Synrm and Pma-synrm Design Criteriamentioning

confidence: 99%

Eliminating rare earth permanent magnets on low‐speed high‐torque machines: A performance and cost comparison of synchronous reluctance machines, ferrite permanent magnet‐synchronous reluctance machines and permanent magnet synchronous machines for a direct‐drive elevator system

Artetxe

Caballero

Prieto

et al. 2021

IET Electric Power Appl

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In the last few years, the reduction of the dependency on rare-earth magnets has been one of the main concerns for electrical machine manufacturers. Synchronous reluctance machines (SynRMs) and ferrite permanent magnet-assisted synchronous reluctance machines (PMa-SynRMs) are emerging as alternatives to permanent magnet synchronous machines (PMSMs) in several applications. In low-speed high-torque applications, PMSMs with large amounts of rare-earth magnets are commonly employed. Thus, it is of particular interest to replace PMSMs by SynRMs or PMa-SynRMs. This article studies the feasibility of using SynRMs and ferrite PMa-SynRMs for a direct-drive elevator system. The challenge lies in obtaining performance characteristics comparable to those of PMSMs, but without resorting to the use of rare-earth permanent magnets. The main criteria for designing SynRMs and PMa-SynRMs for low-speed high-torque applications are presented. Afterwards, a SynRM and a ferrite PMa-SynRM are designed for 160 rpm 200 Nm rated conditions, and a performance and cost comparison between these machines and a commercial PMSM is conducted. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…Often, see e.g. [14][15][16][17][18], the flux linkage is described as a (matrix) product of (possibly nonlinear) inductances and currents, i.e.,…”

Section: Introductionmentioning

confidence: 99%

Nonlinear PI current control of reluctance synchronous machines

Hackl,

Kamper,

Kullick

et al. 2015

Preprint

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This paper discusses nonlinear proportional-integral (PI) current control with anti-windup of reluctance synchronous machines (RSMs) for which the flux linkage maps are known. The nonlinear controller design is based on the tuning rule "Magnitude Optimum criterion" [1]. Due to the nonlinear flux linkage, the current dynamics of RSMs are highly nonlinear and, so, the parameters of the PI controllers and the disturbance compensation feedforward control must be adjusted online (e.g., for each sampling instant). The theoretical results are illustrated and validated by simulation and measurement results.

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New theoretical approach to the synchronous reluctance machine behavior and performance

Cited by 17 publications

References 11 publications

Low‐torque ripple design of a ferrite‐assisted synchronous reluctance motor

Low‐torque ripple design of a ferrite‐assisted synchronous reluctance motor

Eliminating rare earth permanent magnets on low‐speed high‐torque machines: A performance and cost comparison of synchronous reluctance machines, ferrite permanent magnet‐synchronous reluctance machines and permanent magnet synchronous machines for a direct‐drive elevator system

Nonlinear PI current control of reluctance synchronous machines

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