Synchronous High-Speed Reluctance Machine With Novel Rotor Construction

Ikaheimo, J.; Kolehmainen, J.; Kansakangas, Tero; Kivela, Ville; Moghaddam, Reza Rajabi

doi:10.1109/tie.2013.2253077

Cited by 43 publications

(17 citation statements)

References 17 publications

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“…The chosen initial values are for the case at rated operation point without harmonics injection. T avg and T ripple are determined using the electromagnetic model shown in Equations (8)- (10). Afterwards, the optimization algorithm evolves the optimization variables that define the harmonics amplitudes and phase angles (I 1 , I 3 , I 5 , φ 1 , φ 3 and φ 5 ) in order to maximize T avg while respecting the constraints on T ripple and on the RMS current.…”

Section: Optimization Algorithmmentioning

confidence: 99%

“…Therefore, a renewed interest in reluctance machines has emerged, and in particular in the Synchronous Reluctance Machine (SynRM) from a design point of view as in [5,7,10,11,14,15] and a control point of view as in [27,29,32]. It has been reported that the SynRM delivers competitive results in comparison with the Induction Machine (IM) in [12].…”

Section: Introductionmentioning

confidence: 99%

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Torque Ripple Reduction in a Synrm at a Constant Average Torque by Means of Current Harmonics Injection

Yammine¹,

Hénaux²,

Fadel³

et al. 2018

PIER C

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Abstract-This paper studies the impact of current harmonics on the synchronous reluctance machine's average torque and torque ripple. The electromagnetic model of a general m-phase synchronous reluctance machine which integrates the inductance and current harmonics is developed. This model shows that there exist two mechanisms that generate an average torque with a non-zero average value: the proper contribution of the current harmonics and the interaction between them. This model is then used in the case of a 2-phase synchronous reluctance machine with a common transversally laminated anisotropic rotor. This machine design shows negligible inductance harmonics with respect to its fundamental value. Therefore, it has been found that the interaction between the 3rd and 5th current harmonics generates a torque equivalent to the torque generated by the fundamental current component. A locus of the current harmonic components that deliver a constant torque is determined. Furthermore, we have found that, on this locus, the machine torque ripple decreases significantly. Experimental data validate the developed theoretical work and show that at the same torque, the torque ripple is reduced from 20% to 4%.

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Section: Optimization Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Torque Ripple Reduction in a Synrm at a Constant Average Torque by Means of Current Harmonics Injection

Yammine¹,

Hénaux²,

Fadel³

et al. 2018

PIER C

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“…The high stress concentrations in the radial and tangential ribs warrants further investigation of the fatigue life of a rotor design if the typical operating cycle includes frequent positive and negative acceleration (such as electric vehicles or some common industrial loads). The cyclic loading patterns could cause the radial and/or the tangential ribs to suddenly fail, resulting in catastrophic destruction of the rotor, damage to the stator and subsequent electrical faults to be incurred -a different rotor topology may be required [18]. It is beyond the scope of this paper to consider fatigue life of rotors under such cyclic loading conditions further; however, it is suggested here as an important avenue of further research and the stressendurance curve data [19] for the lamination material in use will be important for further investigation.…”

Section: Rotor Rib Fatigue and Failurementioning

confidence: 99%

Electromagnetic–Mechanical Design of Synchronous Reluctance Rotors With Fine Features

Donaghy‐Spargo

2017

IEEE Trans. Magn.

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“…Mainly four design approaches have been recently presented aimed at overcoming the structural limitations of SyR and PMaSyR when applied in high speed applications. The first makes use of solid rotor structure [8], the second encompasses the use of external rotor sleeve [9], the third one adopts a new dual-state soft magnetic material [10] while the last one involves the use of high strength soft magnetic material [11]- [13]. Solid SyR rotor structures could require particular manufacturing process and the machine performances (especially in terms of efficiency) are deeply limited by the high rotor losses.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of a High-Speed Synchronous Reluctance Machine

Nardo

Calzo

Galea

et al. 2018

IEEE Trans. on Ind. Applicat.

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Abstract-Synchronous reluctance machines, including the permanent magnet assisted variants are competitive motor topologies if the application requires high efficiency and a cost effective solution with a high flux weakening capability. However, increasing operating speeds incur challenging design and development decisions, mainly in order to find design solutions that ensure the machines structural integrity without compromising the overall performance. In this paper, a comprehensive design procedure for high speed synchronous reluctance machines is presented. In order to validate the procedure, a 5 kW, 80000 rpm machine is considered. The proposed strategy consists of a two-step procedure in which the electromagnetic and structural designs have been properly decoupled dividing the design space in two subsets. Each subset mainly affects the electromagnetic or the structural performances. Several structural design optimizations have been then performed with the aim of finding the optimal trade-off between the rotor geometrical complexity (that defines the required computational resources) and the electromagnetic performance. The reported experimental tests of the prototyped machine validate the proposed design strategy which can be used as general guidelines on the structural design of synchronous reluctance machines.

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Synchronous High-Speed Reluctance Machine With Novel Rotor Construction

Cited by 43 publications

References 17 publications

Torque Ripple Reduction in a Synrm at a Constant Average Torque by Means of Current Harmonics Injection

Torque Ripple Reduction in a Synrm at a Constant Average Torque by Means of Current Harmonics Injection

Electromagnetic–Mechanical Design of Synchronous Reluctance Rotors With Fine Features

Design Optimization of a High-Speed Synchronous Reluctance Machine

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