Multi-physics optimization strategies for high speed synchronous reluctance machines

Nardo, Mauro Di; Galea, Michael; Gerada, Chris; Palmieri, Marco; Cupertino, Francesco

doi:10.1109/ecce.2015.7310054

Cited by 20 publications

(21 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above procedure is valid only when the considered structural design criterion directly or indirectly leads to the minimization of the iron bridge thicknesses. This design concept has already been validated in [10], where it has also been shown that, if a FE based design assisted by OA both for structural and electromagnetic aspects is adopted, a substantial reduction of the computational time is achieved.…”

Section: Design Proceduresmentioning

confidence: 99%

“…However several combinations of the iron bridge dimensions and distributions can assure the previous essential safety condition, therefore another criterion has to be identified. A possible solution is reported in [10], where the rotor is designed maximizing the mechanical exploitation of the iron bridges; such criterion is fulfilled if the same maximum stress is measured in each structural rib. By doing so, the thicknesses of the iron bridges are implicitly minimized leading to highest torque possible for a given stress limit.…”

Section: Electromagnetic and Structural Performance Indexesmentioning

confidence: 99%

“…In both cases, average torque and torque ripple are the most important performance indexes to consider during the rotor design. In this case study, the second approach has been adopted and more details can be found in [10] and are omitted for the sake of brevity.…”

Section: Electromagnetic and Structural Performance Indexesmentioning

confidence: 99%

“…In order to achieve good HS-SyR designs, able to satisfy the performance and rotor integrity requirements, several multi-physics design approaches have been proposed [8], [9]. It has also been shown [10] that dividing the design procedure in two steps, i.e. the electromagnetic design followed by a proper mechanical design, is a very effective design approach both from computational effort point of view and performance of the final design.…”

mentioning

confidence: 99%

“…The aforementioned model is thus usually used to initially estimate the total iron bridge dimensions but a structural FE design stage is always needed to verify the initial guess and individuate its optimal spatial redistribution [8]. Regarding the latter, in [13] it has been shown that the position of the radial ribs play a key role in the minimization of the maximum von Mises stress. However such results are obtained by means of a parametric study which obviously does not take into account the interaction of all rotor parameters on the structural performances.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Structural design optimization of a high speed synchronous reluctance machine

Nardo

Calzo

Galea

et al. 2016

2016 XXII International Conference on Electrical Machines (ICEM)

Self Cite

View full text Add to dashboard Cite

A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. 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 speeds incur challenging design and development decisions, in order to find an optimal solution between the machine performance and its structural integrity. In this paper, a comprehensive design procedure for such machines is presented, where a 5kW, 80000 rpm synchronous reluctance 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 performed with the aim of finding the optimal trade-off between the rotor geometrical complexity (i.e. computational time) and the electromagnetic performance. The results shown in this paper validate the proposed design strategy which can be used as general guidelines on the structural design of synchronous reluctance machines.

show abstract

Section: Design Proceduresmentioning

confidence: 99%

Section: Electromagnetic and Structural Performance Indexesmentioning

confidence: 99%

Section: Electromagnetic and Structural Performance Indexesmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Structural design optimization of a high speed synchronous reluctance machine

Nardo

Calzo

Galea

et al. 2016

2016 XXII International Conference on Electrical Machines (ICEM)

Self Cite

View full text Add to dashboard Cite

show abstract

Design of a high speed interior claw synchronous reluctance machine

Rouhani

Abdollahi

Gholamian

2021

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Synchronous reluctance machine (SynRM) is one of the candidates of highspeed application drives. The rotor of this machine, as the most important and most challenging part of the design, has various tangential and radial ribs. Therefore, the quantity, thickness and length of the ribs are significant SynRM design parameters. If ribs' thickness is increased in order to enhance the mechanical robustness, its magnetic properties will be substantially deteriorated and vice versa. In this paper, by employing interior claws, a new rotor for SynRM is designed in a way that while increasing the mechanical robustness of the rotor for high speeds application, its magnetic characteristics enhanced, too. For this purpose, the proposed design method is applied on a two-flux barrier rotor of a 24 stator slot SynRM. The designed machine electromagnetic performance is evaluated by finite elements method (FEM) simulation and compared with other designs. Also, the mechanical strength of the proposed rotor with two alternative claws for the speeds up to 50krpm are evaluated and confirmed by structural FE analysis. At the end, the designed interior claw rotor is prototyped and tested. Prototyped SynRM magnetic characteristics that are extracted by experiment confirmed simulations results with acceptable accuracy. K E Y W O R D S flux barrier, flux carrier, interior claw, strain, yield stress List of Symbols and Abbreviations: k wq , Total width flux barrier to total flux carrier ratio; W bi , Width i-th flux barrier; C i , Width i-th flux carrier; N b , Number of flux barrier in the rotor per pole; N c , Number of flux carrier in the rotor per pole; P, Machine's pole pair number; I, Current (A); f qbi , Average mmf of each (i-th) flux barrier along with the q-axis; α 1 , Rotor slot pitch angle (mechanical); f q , q-axis component of the stator mmf (fundamental amplitude in per unit); n s , Machine's slot stator number; Δf qi , Differential average mmf over the each (i-th) barrier; D sh , Shaft diameter; α 2 , The end of final flux barrier angle (mechanical) to q-axis; N bi , i-th flux barrier; f dci , Average mmf of each (i-th) flux carrier along with the d-axis; f d , d-axis component of the stator mmf (fundamental amplitude in per unit); L d , d-axis inductance; L q , q-axis inductance; TR x , Thickness of tangential rib (mm); RR x , Thickness of radial rib (mm); T av , Average Torque (Nm); σ yield , Yield strength of core laminate; σ calc , Calculated maximum stress by FEM; W core , Width of core laminate; ΔT, Torque ripple; ω, Angular speed (mechanical); R so , Rotor slot opening (mm); F c , Centrifugal force over the each flux carrier; V, Velocity of rotor outer surface (m/s); m c , Mass of flux carrier; R c , Radius of center of gravity of flux carrier; S so , Stator slot opening (mm); D r , Rotor outer diameter; k, Factor of safety; n max , Maximum speed; n calc , Calculated speed by FEM; ξ, saliency ratio; SynRM, Synchronous Reluctance Machine; FEM, finite elements method; IM, induction machines; PMSM, permanent magnet synchr...

show abstract