Robust Design Process to Restrain Irreversible Demagnetization of Interior Permanent Magnet Synchronous Motor Applied in Railway Vehicles Using Dysprosium-Free Permanent Magnet

Kong, Hyung-Sik; Lee, Kang Been; Pyo, Hyun-Jo; Jeong, Min-Jae; Kim, Won‐Ho

doi:10.1007/s42835-020-00560-0

Cited by 3 publications

(2 citation statements)

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“…Interior permanent magnet synchronous machines (IPMSM) have been used in automotive propulsion systems. Although IPMSM provides high efficiency and power density compared to IM-based AC machine drives, it is not well fitted for most electrical systems because of the high and fluctuating costs of rare earth magnets [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Eddy Current Loss Reduction in Axial-Flux Motors Using 3D Printing

et al. 2023

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As more electrification and emission-free transportation trends receive more attention, electrical systems applied in the aircraft and automotive industries are changing from fossil fuel and hydraulic systems to electric AC machine drive systems. Three-dimensional printing technology has been contributing to a new design of machines, because it provides many opportunities without limitation compared to the conventional manufacturing system. Although 3D printing technology opened a door for increasing the efficiency and power density of AC machine drives with low conduction loss, an optimal design process for eddy current loss reduction is required, because eddy current loss is affected by the design structure of the machine. The slit structure at the stator shoe is proposed to reduce eddy current loss. With the three variables, the number of slits, the thickness of slits, and the length of ribs, a parametric analysis was conducted to find an optimal design with eddy current loss reduction without a significant performance dip. The optimal design provides an 18.75% decrease in eddy current loss.

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Section: Introductionmentioning

confidence: 99%

Eddy Current Loss Reduction in Axial-Flux Motors Using 3D Printing

et al. 2023

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“…In particular, IPMSMs have a mechanical structure in which a permanent magnet is inserted inside the rotor, and are suitable for high-speed operation [7,8]. The features of IPMSMs are high precision, high reliability, and high efficiency compared with induction motors (IMs); thus, various studies have recently been conducted to replace them as traction motors for railway vehicles [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Direct Self-control of Interior Permanent Magnet Synchronous Motors with a Constant Switching Frequency

Han

Lee

2021

J. Electr. Eng. Technol.

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This paper proposes a direct self-control (DSC) for interior permanent magnet synchronous motors (IPMSMs) with a constant switching frequency. The disadvantage of the conventional DSC, which has the characteristics of low switching frequency and fast torque response in high-power systems such as railway vehicles, is that the switching frequency varies according to the operating conditions. In this study, a torque controller with a constant switching frequency is applied to overcome this problem, instead of the torque hysteresis controller for the conventional DSC. The proposed DSC uses a torque regulator with a proportional-integral (PI) controller and a triangular carrier to realize a constant switching frequency. In the transient state of the torque, the dynamic torque response is slow because both zero and active voltage vectors are selected. Therefore, only the active voltage vectors are applied during the transient state of the torque to improve the dynamic torque response. The effectiveness of the proposed DSC is verified through simulation and experimental results.

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