Design of stator core shape of &amp;#x2018;Magnetic anisotropic motor&amp;#x2019;

Fujisaki, Keisuke; Fujitani, Kohei

doi:10.1109/icelmach.2012.6349861

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…The magnetic characteristics of the former are uniform regardless of the direction of the magnetic flux flowing through the NO. Therefore, NO has been widely used for the core material of the rotation machine, such as the motor, that the direction of the magnetic flux of the core changes according to the position of the rotor or the instantaneous input current of each phase [18].…”

Section: A Magnetic Characteristic Of the Grainoriented Electrical Steelmentioning

confidence: 99%

Performance Enhancement of the IPMSM for HEV Applications Using Grain-Oriented Electrical Steel and Design Optimization

et al. 2022

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This paper proposes a method for enhancing the performance of an interior permanent magnet synchronous motor (IPMSM) using grain-oriented electrical steel (GO) and design optimization. As the GO has superior magnetic characteristics in the rolling direction, the GO is applied to the stator teeth to increase the torque and reduce the iron loss of the IPMSM. However, such an approach leads to higher saturation on the core, resulting in worse pulsation characteristics. To handle with pulsation problem on the IPMSM, design optimization is conducted. In this paper, the interpolation multi-objective robust optimization algorithm (IMROA) was proposed. The IMROA can reduce the calculation time by interpolating the objective region and utilizing a stepwise sampling strategy. Moreover, the IMROA considers the robustness of the found solution and can derive a robust global solution that has robustness on the manufacturing tolerance and deformation during the operation and prevents unexpected results on the IPMSM.

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Section: A Magnetic Characteristic Of the Grainoriented Electrical Steelmentioning

confidence: 99%

Performance Enhancement of the IPMSM for HEV Applications Using Grain-Oriented Electrical Steel and Design Optimization

et al. 2022

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“…The prototype improves the saliency ratio by 47% and thus the torquecurrent characteristic compared to a conventional NOES rotor. In [5] [27] [28], the authors have studied and realized a GOES PM stator fully segmented, where the RD of the sheet is maintained in the direction of the field lines in the yoke and in the tooth (Fig. 14).…”

Section: ++++ ++++ ++++mentioning

confidence: 99%

“…The field direction is mainly unidirectional, which is well adapted to exploit the GOES properties of the Rolling Direction (RD) [4]. The GOES moderate cost and the low iron losses in the RD when compared with NOES make this material an attractive candidate to improve efficiency of eMotors used in automotive applications [5]. That is why segmented stator cores mixing GOES and NOES constitute a serious way of improvement.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Flux Density and Iron Loss Distributions in Segmented Magnetic Circuits Made With Mixed Electrical Steel Grades

et al. 2022

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This paper presents the potential contribution of segmented stator magnetic circuits of rotating permanent magnets electrical machines with concentric winding. Two magnetic materials are mixed, FeSi Non-Oriented Electrical Steel (NOES) and FeSi Grain Oriented Electrical Steel (GOES). The choice of using GOES is based on the high performance it offers in terms of permeability and iron losses compared to conventional NOES, particularly when GOES is magnetised in the Rolling Direction (RD). The goal is to analyse the contribution of the mixed magnetic circuit on the losses and electromagnetic torque, but also the drawbacks due to the cut process and to the assembly. The behaviour of the magnetic field at the junction between the segments is studied by comparing different geometrical connection shapes and compared to a reference magnetic circuit fully made with NOES sheets. This comparison is experimentally made with a model representative of the existing phenomena in an electrical machine. In addition, numerical calculations using finite elements software are carried out, by considering both the magnetic anisotropy and the saturation of the GOES.

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“…4.b has to be taken inferior to 90°. In the previous study 14) , numerical analysis has been performed in order to find an angle that would ensure good tradeoff between iron loss minimization and mechanical solidity. The selected angle is 80°.…”

Section: Trial Manufacture Of Magnetic Anisotropic Motormentioning

confidence: 99%

“…This configuration has been chosen as an attempt to maximize the correspondence between the magnetic flux direction and the GO easy magnetization direction. In previous works, the suitable shape of the proposed magnetic anisotropic motor was designed by using finite element analysis (FEA) 14) . Iron loss measurement trials have been made under "drag force operation" (IPMSM rotated by an external motor) in the previous work 1 5 ) but it is believed that these measurements along with the analysis have to be corrected and improved.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Magnetic Core for the Iron Loss Reduction of Permanent Magnet Synchronous Motor

et al. 2018

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An interior permanent magnet synchronous motor (IPMSM) using a stator core made of grain-oriented (GO) anisotropic magnetic material is manufactured to evaluate the potential iron loss reduction that GO can bring compared to the conventionally used non-oriented (NO) quasi-isotropic silicon steel. The stator core is divided into yoke and teeth pieces that are arranged so that the GO material easy magnetization direction follows the main magnetic flux that flows in the core during the motor operation. The motor iron loss is measured under two conditions: 1) the IPMSM is rotated by an external motor ("drag force operation"), 2) the IPMSM is driven by a pulse-width modulation (PWM) inverter without load ("no-load operation"). The manufactured motor shows 13.5 % iron loss reduction during drag force operation and 5 % reduction during no-load operation. Numerical calculation is also carried out by 2-D finite element analysis (FEA) to confirm the experimental data.

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Design of stator core shape of ‘Magnetic anisotropic motor’

Cited by 7 publications

References 6 publications

Performance Enhancement of the IPMSM for HEV Applications Using Grain-Oriented Electrical Steel and Design Optimization

Performance Enhancement of the IPMSM for HEV Applications Using Grain-Oriented Electrical Steel and Design Optimization

Analysis of Flux Density and Iron Loss Distributions in Segmented Magnetic Circuits Made With Mixed Electrical Steel Grades

Anisotropic Magnetic Core for the Iron Loss Reduction of Permanent Magnet Synchronous Motor

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