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유준열(Ryu, Jun-Yeol) 대한전기학회 2023 전기의 세계 Vol.72 No.6
최근 환경에 대한 규제로 인해 시장에서 전기자동차에 대한 수요가 증가하는 추세이다. 따라서, xEV용 전기 모터에 대한 R&D 또한 활발히 진행되고 있다. 이러한 시장의 변화에 발맞추어 국내 중소/중견 부품 제작업체는 다양한 차종 및 주행조건에 대해 선제적/독자적 개발이 가능하도록 CAE 기반 전기 모터설계기술을 보유해야 한다. 전자계 해석을 기반으로 한 모터 특성 해석 기법을 이용하면 변화하는 자동차 성능 요구 설계 사양에 맞추어 설계 단계에서 성능을 예측할 수 있으므로 R&D 비용에 대한 부담을 줄일 수 있고, 이는 중소/중견 기업의 성장 및 저변 확대로 이어질 수 있다. 따라서, 본 기고에서는 CAE 기반 차량용 전기 모터 설계기술에 대한 소개와 각 기법의 적용 범위에 대해 설명한다. Recently, the demand for electric vehicles is increasing in the market due to the environmental regulations. Consequently, R&D of electric motors for xEVs has been actively in progress. In line with these market changes, domestic small/medium -sized companies must possess the CAE-based electric motor design technology to enable enable preemptive and independent development of various vehicle models and driving conditions. Using the motor characteristic analysis based on the electro-magnetic analysis, it is possible to predict the electric performance of electric parts in the design stage before actual manufacturing in accordance with the changing requirements in the automobile industry, thereby it can reduce the R&D costs and supporting the growth of those companies. Therefore, in this article, the CAE-based integrated design techniques for electric components are presented and the application range of each technique is also explained.
인버터 시뮬레이션을 통한 차량용 구동 모터의 토크 특성 예측
유준열(Jun-Yeol Ryu),이수경(Soo-Gyung Lee),임명섭(Myung-Seop Lim) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
This paper proposed the method to predict accurate torque of traction motor for vehicle by using the inverter simulation. Since electric performance of electric motor has been calculated considering only sinusoidal current in conventional, electric performance is often inaccurate. the electric motor and inverter model were coupled to calculate the current. In the model, current harmonics were calculated by the d, q axis voltage equation. With the predicted current, average torque and torque ripple was calculated by using 2D static electromagnetic analysis. Calculated torque was compared to torque considering sinusoidal current. Through the comparison, it was verified that accurate current and motor performance of traction motor for vehicle were calculated by using the proposed inverter simulation.
형상 변화를 통한 ISG용 권선 계자형 동기모터의 출력 개선 설계
이수경(Soo-Gyung Lee),유준열(Jun-Yeol Ryu),정영훈(Young-Hoon Jung),임명섭(Myung-Seop Lim) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
For ISG (integrated starter-generator), high power and efficiency characteristics are required. Conventionally, it is known that PMSM (permanent magnet synchronous motor) is appropriate for ISG, due to its high performance. However, unstable supply of the rare earth magnet becomes issue these days. Among many types that can be substitute for PMSM, WFSM (wound field synchronous motor) has received attention. In this paper, design of WFSM to achieve high power is presented. By increasing axial length and changing number of coils, power improved in the same electric power specification.
이동재(Dong Jae Lee),유준열(Jun-Yeol Ryu),설현수(Hyun-Soo Seol),조수연(Su Yeon Cho),신외경(wae gyeong shin),김원호(Won-ho Kim) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
In a transformer design, leakage flux must be considered to achieve high efficiency. In a conventional, it has been calculated by using the 3-dimensional finite element analysis, which can allow accurate prediction. However, it requires too much computational time. As its alternative, the equivalent magnetic circuit (EMC) was adopted, which can dramatically reduce the computational time while maintaining a reliability in the transformer design. In this paper, the EMC of reference transformer model was constructed and its experimental validation was carried out. Through the EMC, the leakage inductance according to design variables was analyzed. Then, the improved design was performed to reduce leakage flux of the reference model. Finally, the designed transformer was compared to the reference model.
위성혁(Sung-Hyeok Wi),유준열(Jun-Yeol Ryu),홍정표(Jung-Pyo Hong) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Since the motor for EPS(Electric Power Steering) is an automobile part involved in wheel operation, it is necessary to consider the mechanical response as well as the electrical performance in design stage. Electrical and mechanical performance can be estimated by using both analytical method and finite element method. However, finite element method has the disadvantage such as hard preprocessing and long analysis time. Therefore, in this paper, it is aimed to estimate the electromechanical parameters through mathematical modeling and to improve the mechanical response efficiently by using the voltage equation and the motion equation with the simulink block model. In addition, the speed controller is designed to improve mechanical response. Finally, the mechanical response results of the base model and the improved model are compared through finite element method.