http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
마그파인 자석의 불가역 감자 특성을 고려한 EV 구동용 전동기 설계
박호용(Ho-Yong Park),이수경(Soo-Gyung Lee),정영훈(Young-Hoon Jung),정경태(Kyung-Tae Jung),홍정표(Jung-Pyo Hong) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Recently, the high power density and efficiency of interior permanent magnet synchronous motor (IPMSM) for electric vehicle traction has been attracting attention. Particularly in order to overcome the cost issues of rare-earth dependent on China, Magfine magnet, which consists of neodymium without Dysprosium (Dy) and has enhanced coercive force, has been developed. However, Magfine magnet is vulnerable to irreversible demagnetization by external magnetic field. And it is essential to prevent this phenomenon. This paper suggests a design using the magnetic flux barriers in order to decrease the irreversible demagnetization of the permanent magnet (PM). Also, by using the 2-D finite element analysis (2-D FEA), it was confirmed that the permanent magnet irreversible demagnetization characteristic of the proposed model is improved. Thus, when advancing research in consideration of the Magfine fabrication process, it is expected that the commercialization of Magfine magnet can be accelerated with a more accurate performance prediction.
Q축 스텝 전류지령의 속도응답을 이용한 영구자석 감자율 측정 방법
김강원(Kangwon Kim),이상빈(Sang Bin Lee) 한국자동차공학회 2022 한국 자동차공학회논문집 Vol.30 No.11
With the increase of the use of permanent magnet synchronous motors, many diagnostic methods to estimate the demagnetization rate of permanent magnets have been studied. This paper is proposing an accurate method to diagnose demagnetization rate based on speed response under the q-axis current excitation. Experimental results show that this diagnostic method can detect demagnetization rate with minimal error.
철도차량용 IPMSM의 불가역 감자 강건 설계에 관한 연구
공형식,표현조,정민재,남동우,장익상,김원호 한국철도학회 2019 한국철도학회논문집 Vol.22 No.12
As the technology of induction motor has matured, it has reached a limit to proposed improvements over existing methods. Advances in power electronics have enabled individual control of synchronous motors. As a result, research is being actively conducted to replace conventional induction motors with high efficiency and high torque Interior Permanent Magnet Synchronous Motors (IPMSM). Since IPMSM uses permanent magnets, consideration must be given to the irreversible demagnetization that can occur in railroad cars operating at high temperatures. This paper replaces the existing induction motor with a permanent magnet motor with the same performance and, through performance analysis by rotor type, proposes an IPMSM rotor model that is robust to irreversible demagnetization.
Ferrite 영구자석을 적용한 EV 구동용 IPMSM의 전기적, 기계적 특성 연구
김기오(Ki-O Kim),정영훈(Young-Hoon Jung),박민로(Min-Ro Park),임명섭(Myung-Seop Lim) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
Recently, because of the instability of rare-earth resource supply and demand, research on rare-earth free in various fields is urgent. Accordingly, studies are being actively conducted to apply ferrite permanent magnet to IPMSM (Interior Permanent Magnet Synchronous Motor) used as electrical vehicle (EV) traction motors. Ferrite permanent magnet is cheap and easy to obtain. However, it has lower coercive force values than rare earth permanent magnets, and there is a large armature reaction occurs during EV motor operation, it is necessary to check for irreversible demagnetization. In addition, the limited space of the vehicle requires a high power density of the motor. In order to satisfy the high power density, the motor must be speeded up. Therefore, the problem of mechanical stiffness due to the generation of very large centrifugal force must also be considered. In this paper, the irreversible demagnetization characteristics and mechanical stiffness of IPMSM with ferrite permanent magnet. When determining the rotor shape, the sensitivity of each performance is analyzed through of variance of design factors. Sensitivity analysis is based on the maximum stress of the rotor and irreversible demagnetization characteristics. P-value less than 0.05 can be used as major design factors in motor design by determining sensitivity factors for each performance.
HEV용 매입형 영구자석 동기전동기의 출력밀도 향상설계
정대성(Dae-Sung Jung),이현동(Hyeoun-Dong Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Due to concern about exhaustion of natural resources and pollution caused by the use of fossil fuel, research for the electric vehicle is on the increase. Especially, the HEV becomes an object of attention because it has engine to compensate defect of insufficient battery capacity and advantage of relatively low production costs. Traction motor of HEV is IPMSM type which has the merits of high torque, high power and high efficiency because of using reluctance torque. This paper dealt with analysis of the IPMSM used in the specific HEV and shows problem of initial motor. Based on the defect suggested, improving design is conducted by alteration of permanent magnet shape and change of design factors which are related to electromagnetic characteristics. The initial motor has high torque ripple which causes noise and vibration and has grooves between the pole and pole to protect demagnetization generated by eddy current. The modified design guarantees Q-axis flux path to increase the reluctance torque and minimizes volume by growth of turns from introduction of closed slot design. So, the modified motor improves power performance and reduces cogging torque. The manufacturing costs are also decreased by reduction in amount of magnet and core weight.
결선법과 고장 모드에 따른 BLDC 모터의 비가역 감자 특성 연구
이찬우(ChanWoo Lee),김수원(SuWon Kim),오지환(JiHwan Oh),고재유(JaeYu Ko) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
The winding connection type for driving the BLDC motor includes a Y connection and a Delta connection, and selects the winding connection type considering the advantages and disadvantages of each type and the application of the BLDC motor. Generally, we compare and consider the impact on the design structure, torque ripple, noise, consumption current, and control characteristics. However, in the case of motors used in automotive system, various failure modes are occurred, and thereby safety and failure characteristics should be considered and reflected to the design of the motor. In this paper, a new standard for selecting the connection type is proposed by performing research on irreversible demagnetization characteristics by the winding connection type and the circuit failure mode. For this purpose, design parameters by the winding connection type are compared, and basic performance in a normal condition and characteristics of irreversible demagnetization are compared. In addition, irreversible demagnetization characteristics according to failure modes such as Short and Open of the circuit are compared, and confirm the impact of the winding connection type. The research is conducted on a BLDC motor for automotive system and the validation is carried out through FEA (Finite Element Analysis) electromagnetic field analysis tool.