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반응표면분석법을 이용한 영구자석의 형상 및 특성에 따른 매입형 영구자석 동기기의 최적 설계
임영훈(Young-Hun Im),장석명(Seok-Myoung-Jang) 대한전기학회 2013 전기학회논문지 Vol.62 No.8
Interior Permanent Magnet Synchronous Machines (IPMSMs) with rare earth magnet are widely used in electric vehicles and hybrid electric vehicles. IPMSMs having high efficiency, high torque, and a wide speed range are employed in propulsion system. And the rotor in an IPMSM is generally made of a rare earth magnet to achieve a large energy product and high torque. This paper discusses issues regarding design and performance of IPMSMs using different factors of BH magnetic characteristic. It is necessary to choose factors of magnetic material according to permanent magnet shape in rotor for high performance. Response Surface Methodology (RSM) is selected to obtain factors of magnetic material according to variety of rotor shapes. The RSM is a collection of mathematical and statistical techniques useful for the analysis of problems in which a response of interest in influenced by several variables and the objective is to optimize response. Therefore, it is necessary to analyze the torque characteristics of an IPMSM having magnet BH hysteresis curve with different rotor shape. Factors of residual flux density (Br) factor and intrinsic coercive force (Hc) are important parameters in RSM for rotor shape. The rotor shapes for IPMSMs having magnet BH characteristic were investigated using the RSM, and three shapes were analyzed in detail using FEA. The results lead to design consequence of IPMSMs in the various rare earth magnet materials.
임영훈(Young-Hun Im) 대한전기학회 2021 전기의 세계 Vol.70 No.11
최근 이슈가 되고 있는 전기자동차용 구동 모터와 관련된 특허 동향을 분석하여, 글로벌 시장의 대응 및 기술경쟁력 확보를 위한 활용 방안으로 이용하고자 한다. It is introduces patent trend analysis related to traction motor for electric vehicle recently, how to use it with global market response and technical competitiveness.
회전자 영구자석 형상에 따른 외전형 BLDC 전동기의 특성비교 연구
정재훈(Jae-Hoon Jeong),조한욱(Han-Wook Cho),최장영(Jang-Young Choi),임영훈(Young-Hun Im),장석명(Seok-Myeong Jang) 대한전기학회 2014 전기학회논문지 Vol.63 No.2
In this paper, we presented a study on the design of permanent magnet rotor for exterior rotor type brushless direct current(BLDC) motor. To reduce the cogging torque and torque ripple, the specific shape and magnetization pattern of permanent magnets in BLDC motors are suggested. Firstly, four permanent magnet models with different shapes and magnetization arrays are presented. The results from the finite element method(FEM), the most effective model for reducing cogging torque and torque ripple was presented. In addition, to confirm the steady state performance, the torque-speed characteristic analysis has been performed with variable speed and load. Finally, the best permanent magnet model for reducing cogging torque and torque ripple with appropriate torque-speed performance was selected through the comparison according to the device volume.