Design of IPMSM for reduction of eddy current loss in permanent magnets to prevent irreversible demagnetization

Jung, Jaewoo; Lee, Byeong-Hwa; Kim, Kyu-Seob; Hong, Jung-Pyo

doi:10.1109/iemdc.2017.8002397

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…The demagnetization must be considered for high-speed machines because such machines have generally large electric loads. Equation (2) for the PM thickness l PM to prevent irreversible demagnetization is shown as follows [8], [18].…”

Section: A Thickness Of the Permanent Magnetmentioning

confidence: 99%

Design and Verification of 150-krpm PMSM Based on Experiment Results of Prototype

Lim

Chai

Yang

et al. 2015

IEEE Trans. Ind. Electron.

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This paper proposes the design process of a 2.62kW-150krpm high-speed surface-mounted permanent magnet synchronous motor (SPMSM). To meet the required specifications, the numbers of poles and slots were determined by considering the maximum speed and the rotary stability affected by the vibration of the rotor. In addition, the paper describes not only the appropriate material selection method but the appropriate geometry design method based on analytic approaches. Furthermore, to precisely evaluate the bearing and windage losses at a high speed, a method that combines the finiteelement method (FEM) and the experiment results of the prototype was used. As a result, an improved motor was designed, which had higher maximum power and speed than the prototype, and a lower mass moment of inertia. Finally, tests were conducted to verify the validity of the proposed design process and the effectiveness of the motor.Index Terms -Copper loss, eddy current loss, high-speed machine, iron loss, mechanical loss, surface-mounted permanent magnet synchronous motor, vibration T

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Section: A Thickness Of the Permanent Magnetmentioning

confidence: 99%

Design and Verification of 150-krpm PMSM Based on Experiment Results of Prototype

Lim

Chai

Yang

et al. 2015

IEEE Trans. Ind. Electron.

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“…Therefore, in this paper, the eddy current loss of the inserted permanent magnet is not considered. In this section we will discuss reducing iron loss and the copper loss, which can be achieved by redesigning the magnetic circuit [9].…”

Section: Electromagnetic Designmentioning

confidence: 99%

Range Extension of Light-Duty Electric Vehicle Improving Efficiency and Power Density of IPMSM Considering Driving Cycle

Dong-min¹,

Jung²,

Lim³

et al. 2016

The Transactions of The Korean Institute of Electrical Engineer

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-Recently, the trend of zero emissions has increased in automotive engineering because of environmental problems and regulations. Therefore, the development of battery electric vehicles (EVs), hybrid/plug-in hybrid electric vehicles (HEVs/PHEVs), and fuel cell electric vehicles (FCEVs) has been mainstreamed. In particular, for light-duty electric vehicles, improvement in electric motor performance is directly linked to driving range and driving performance. In this paper, using an improved design for the interior permanent magnet synchronous motor (IPMSM), the EV driving range for the light-duty EV was extended. In the electromagnetic design process, a 2D finite element method (FEM) was used. Furthermore, to consider mechanical stress, ANSYS Workbench was adopted. To conduct a vehicle simulation, the vehicle was modeled to include an electric motor model, energy storage model, and regenerative braking. From these results, using the advanced vehicle simulator (ADVISOR) based on MATLAB Simulink, a vehicle simulation was performed, and the effects of the improved design were described.

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“…Interior permanent magnet synchronous motors (IPMSMs) using Nd-Fe-B magnets have been developed for traction motors in electric vehicles (EVs) and hybrid electric vehicles (HEVs). In general, the performance of NdFeB PMs decreases with increasing temperature [1,2]. For instance, the residual magnetic flux density (Br) shows a decrease, and the knee point on the demagnetization curve occurs in the second quadrant [3,4].…”

Section: Introductionmentioning

confidence: 99%

Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

et al. 2020

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We designed and analyzed an interior permanent magnet synchronous motor (IPMSM) to prevent irreversible demagnetization of the permanent magnets (PMs). Irreversible demagnetization of NdFeB PMs mainly occurs due to high temperature, which should thus be minimized. Therefore, it is necessary to reduce the eddy current loss in the PM through optimal design. The shape of the rotor core was optimized using finite element analysis (FEA) and response surface methodology. Three-dimensional (3-D) FEA is required for accurate computation of the eddy current loss, but there is huge time, effort, and cost consumption. Therefore, a method is proposed for indirectly calculating the eddy current loss of PMs using 2-D FEA. A thermal equivalent circuit analysis was used to calculate the PM temperature of the optimized model. For the thermal analysis, the copper loss, core loss, and eddy current loss in PMs were estimated and applied as a heat source. Based on the results, we confirmed the stability of the optimum model in terms of the PM demagnetization.

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Design of IPMSM for reduction of eddy current loss in permanent magnets to prevent irreversible demagnetization

Cited by 8 publications

References 12 publications

Design and Verification of 150-krpm PMSM Based on Experiment Results of Prototype

Design and Verification of 150-krpm PMSM Based on Experiment Results of Prototype

Range Extension of Light-Duty Electric Vehicle Improving Efficiency and Power Density of IPMSM Considering Driving Cycle

Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

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