Simultaneous Magnetic and Structural Topology Optimization of Synchronous Reluctance Machine Rotors

Guo, Feng; Brown, Ian

doi:10.1109/tmag.2020.3014289

Cited by 36 publications

(16 citation statements)

References 31 publications

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“…An example for this can be found in the WPT TO of [132] where the final layout may have different disconnected components. If the TO has to result in a single domain, a structurally feasible layout can be ensured coupling the electromagnetic TO optimization with a structural one, as shown in [166].…”

Section: Discussionmentioning

confidence: 99%

Topology Optimization for Electromagnetics: A Survey

et al. 2022

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The development of technologies for the additive manufacturing, in particular of metallic materials, is offering the possibility of producing parts with complex geometries. This opens up to the possibility of using topological optimization methods for the design of electromagnetic devices. Hence, a wide variety of approaches, originally developed for solid mechanics, have recently become attractive also in the field of electromagnetics. The general distinction between gradient-based and gradient-free methods drives the structure of the paper, with the latter becoming particularly attractive in the last years due to the concepts of artificial neural networks. The aim of this paper is twofold. On one hand, the paper aims at summarizing and describing the state-of-art on topology optimization techniques while on the other it aims at showing how the latter methodologies developed in non-electromagnetic framework (e.g., solid mechanics field) can be applied for the optimization of electromagnetic devices. Discussions and comparisons are both supported by theoretical aspects and numerical results.

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Section: Discussionmentioning

confidence: 99%

Topology Optimization for Electromagnetics: A Survey

et al. 2022

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“…14. Multiphysics optimization can be performed using SIMP approaches, as in [27], [41], although a previous electromagnetic optimization is performed, and once a magnetically functional structure is achieved, a magneto-structural optimization is applied. For on-off methods with multi-objective algorithms, literature on magneto-structural optimization has not been found.…”

Section: Comparisonmentioning

confidence: 99%

“…The consideration of intermediate material states -compared to binary mesh cell densities (either 0 or 1) -vastly increases the complexity of the model. Therefore, SIMP approaches are normally coupled with gradient-based procedures, with adjoint variable methods [26], [27] being the most popular, as they can significantly reduce the computation time of derivatives compared to finite difference techniques. This method has been applied to the TO of electrical machines in different scenarios, such as in the torque optimization of PMSMs [28] and in the improvement of torque characteristics of a synchronous reluctance motor [29], [30].…”

Section: Introductionmentioning

confidence: 99%

Novel Topology Optimization Method for Weight Reduction in Electrical Machines

et al. 2022

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This paper proposes a combined electromagnetic and mechanical topology optimization for weight reduction in electrical machines based on Finite Element Analysis (FEA) and Evolutionary Structural Optimization (ESO). The devised method is an on-off-type algorithm with adaptative mesh in which low flux density and low Von Mises stress cells are removed successively from a first machine design. With this approach, the weight of the machine can be considerably reduced without compromising the electromagnetic performance of the machine, with a reduced computation time compared to other topology optimization methods. A case study involving a 1.2 MW low-speed, permanent magnet motor is analyzed under different conditions (algorithm parameters, initial mesh, rotational speed) and used to compare the proposed method with two other topology optimization approaches.

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“…Therefore, it is evident that an optimization process is necessary to optimally select the parameters of the SynRM rotor. Through literature, several research papers about the optimization of SynRMs can be found [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Various optimization schemes have been reported and applied to SynRM design.…”

Section: Introductionmentioning

confidence: 99%

“…The current angle was fixed based on a rule of thumb or primary simulation i.e., in the range of 45° to 60° as in [26]. In [27], a simultaneous structural and magnetic topology optimization technique was developed for the rotor of the SynRM using solid isotropic with material penalization. The total structural compliance, torque ripple, and the average torque were simultaneously considered in this method.…”

Section: Introductionmentioning

confidence: 99%

Optimal Rotor Design of Synchronous Reluctance Machines Considering the Effect of Current Angle

et al. 2021

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The torque density and efficiency of synchronous reluctance machines (SynRMs) are greatly affected by the geometry of the rotor. Hence, an optimal design of the SynRM rotor geometry is highly recommended to achieve optimal performance (i.e., torque density, efficiency, and power factor). This paper studies the impact of considering the current angle as a variable during the optimization process on the resulting optimal geometry of the SynRM rotor. Various cases are analyzed and compared for different ranges of current angles during the optimization process. The analysis is carried out using finite element magnetic simulation. The obtained optimal geometry is prototyped for validation purposes. It is observed that when considering the effect of the current angle during the optimization process, the output power of the optimal geometry is about 3.32% higher than that of a fixed current angle case. In addition, during the optimization process, the case which considers the current angle as a variable has reached the optimal rotor geometry faster than that of a fixed current angle case. Moreover, it is observed that for a fixed current angle case, the torque ripple is affected by the selected value of the current angle. The torque ripple is greatly decreased by about 34.20% with a current angle of 45° compared to a current angle of 56.50°, which was introduced in previous literature.

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Simultaneous Magnetic and Structural Topology Optimization of Synchronous Reluctance Machine Rotors

Cited by 36 publications

References 31 publications

Topology Optimization for Electromagnetics: A Survey

Topology Optimization for Electromagnetics: A Survey

Novel Topology Optimization Method for Weight Reduction in Electrical Machines

Optimal Rotor Design of Synchronous Reluctance Machines Considering the Effect of Current Angle

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