가감속 성능향상을 위한 매입형 영구자석 견인전동기 연구

박현준 한국도시철도학회 2019 한국도시철도학회논문집 Vol.7 No.2

In this study, it is necessary to analyze characteristics of the improvement of acceleration/deceleration performance using the existing vehicles according to the operation specifications. Also, it is important to analyzed the traction power of the improved acceleration/deceleration performance of vehicle, to calculate the capacity per a motor and to design the final conceptual design. To improve the acceleration/deceleration of railway vehicles, it is necessary to analyze acceleration/deceleration characteristics of existing railway vehicles. Therefore, in this study, the acceleration/deceleration characteristics of the propulsion system were analyzed based on the existing Seoul Metro's Line 2 vehicle. Based on the specification of the 5M5T of Line 2 vehicle, the required torque and capacity per a traction motor of vehicle were analyzed when the acceleration/deceleration is raised from the existing 3.0km/h/s to 4.8km/h/s or 6km/h/s. Based on the analysis of the required torque and capacity per a traction motor according to the vehicles(5M5T, 8M2T, 9M1T and 10M) and acceleration(3.0km/h/s, 4.8km/h/s, 6.0km/h/s), the basic design of the traction motor was performed for each vehicle and acceleration. The traction motor was designed with a interior permanent magnet synchronous motor with high efficiency and high power density compared to the conventional induction motor. The size of the traction motor was set to the limited size of the conventional traction motor of 5M5T and the acceleration of 3.0km/h/s. 철도차량의 가ㆍ감속 성능을 향상시키기 위해서는 기존 철도차량의 가ㆍ감속 특성 분석이 필요하다. 따라서 검토과정의 대상으로는 기존 도시ㆍ광역철도차량인 서울교통공사 2호선 차량을 기준으로 추진시스템의 가ㆍ감속 성능 특성을 분석하였다. 2호선 도시철도차량(5M5T)의 운행사양을 바탕으로 기존 가ㆍ감속도인 3.0km/h/s에서 4.8km/h/s, 6.0km/h/s로 상승될 때 차량에서의 요구 견인력과 견인전동기 1대 당 요구 토크 및 용량을 분석하였다. 그리고 기존 5M5T 차량 외 추가적으로 M차 T차 변화에 따른 가ㆍ감속 성능 향상을 위한 특성을 분석하였다. 차량 8M2T, 9M1T, 10M, 가속도 3.0km/h/s, 4.8km/h/s, 6.0km/h/s에 따라서 차량의 요구 견인력과 견인전동기 1대 당 요구 토크 및 용량을 분석하였다. 본 논문에서는 차량 5M5T, 8M2T, 9M1T, 10M, 가속도 3.0km/h/s, 4.8km/h/s, 6.0km/h/s에 따라서 견인전동기 1대 당 요구 토크 및 용량을 분석한 결과를 바탕으로 각 차량, 가속도 별로 견인전동기 형태설계를 수행하였다. 견인전동기는 기존 유도전동기 대비 높은 효율과 고출력밀도 특성을 갖는 매입형 영구자석 동기전동기로 제안하여 형태설계를 수행하였다. 견인전동기의 사이즈 분석의 기준 대상으로 기존 차량 5M5T, 가속도 3.0km/h/s의 견인전동기 사이즈를 제한사이즈로 설정하고, 기존 대차에 취부 가능한지에 대한 분석을 수행하였다.

전기 자동차용 견인 전동기 설계 및 극수 변화에 따른 특성 분석

이동희(Dng-hee Lee),박민로(Min-Ro Park),차경수(Kyung-Soo Cha),홍정표(Jung-Pyo Hong) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11

In this paper, traction motor for Electric Vehicle(EV) is designed according to system requirements, and high power density motor is designed and compared in the same system. The design specifications of the standard motor are Interior Permanent magnet Synchronous Motor(IPMSM) of 8pole-48slot of 100kW class, 280Nm for maximum torque and 12,000rpm for maximum speed. Design of the motor was aimed at maximizing the torque density using response Surface Methodology (RSM). The specifications of the high power density motors to be compared were determined after increasing the reduction gear ratio in the same system specification. Based on the assumption that the carrier frequency of the inverter is the same, the number of poles is determined according to the maximum speed of the motor and the 6pole-36slot model is designed through the same process. The characteristics of the motor such as power density and efficiency were compared according to the design results of the two motors.

Comparative Study on Novel Dual Stator Radial Flux and Axial Flux Permanent Magnet Motors With Ferrite Magnets for Traction Application

Wenliang Zhao,Lipo, Thomas A.,Byung-Il Kwon IEEE 2014 IEEE transactions on magnetics Vol.50 No.11

<P>This paper proposes two novel traction motors with ferrite magnets for hybrid electric vehicles (HEVs), which have competitive torque density and efficiency as well as operating range with respect to a referenced rare earth magnet motor employed in the third-generation Toyota Prius, a commercialized HEV. The two proposed traction motors, named as dual stator radial flux permanent magnet motor (DSRFPMM) and dual stator axial flux permanent magnet motor (DSAFPMM), adopt the same design concept, which incorporates the unaligned arrangement of two stators together with the use of spoke-type magnet array and phase-group concentrated-coil windings for the purpose of increasing torque density and reducing torque ripple. A finite element method is utilized for predicting the main characteristics, such as back electromotive force, cogging torque, electromagnetic torque, iron loss, and efficiency in both of the proposed motors. Moreover, a comparative study between the proposed DSRFPMM and DSAFPMM is performed under the same operating condition. As a result, it is demonstrated that both of the proposed ferrite permanent magnet motors could be good alternatives for traction application, replacing the rare earth magnet motors.</P>

차세대 전동차 DDM 유지보수방안 연구

김영규(Kim young-kyu),박세영(Park se-young),이기수(Lee gi-su),송정훈(Song jeong-hun),이한민(Lee han-min) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

Electric motor car's driving traction system for the latest train car has been developed from the DC series motor by resistance control and chopper control to the induction motor whose efficiency and maintenance are excellent by VVVF inverter control. In spite of this innovative development, as it is hard to expect more improvement than the existing system when it enters into technical maturity, Direct Drive Motor whose high maintenance free, efficiency, energy saving, low-noise and lightweight can be realized. This study examines and analyzes the maintenance system of existing electric motor car's traction motor operated by urban railway operation institutes and derives efficient maintenance methods through examining and analyzing the problems which can occur when applying maintenance method of next generation train's Direct Drive Motor.

하이브리드 시스템 구동 모터의 고장 검출 및 진단

한규홍(Kyuhong Han),김지환(Jihwan Kim),김현섭(Hyunsup Kim),박태호(Taeho Park),김지훈(Jihun Kim),홍정호(Jeongho Hong),이형철(Hyeongcheol Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4

This paper presents the fault detection and isolation (FDI) strategy for a parallel hybrid electric vehicle (HEV). The powertrain of the target parallel HEV consists of an internal combustion engine, an integrated starter and generator (ISG), a traction motor, an ISG belt as a pulley system and an engine clutch between the engine and the traction motor. In this study, the model-based FDI algorithm for the current and the angle sensors in the ISG and the traction motor is developed. In the supervisory controller, another FDI algorithm is also developed through structural analysis of the ISG belt and the engine clutch. This FDI algorithm utilizes a powertrain model composed of five sub-models: the ISG, the ISG belt, the engine, the engine clutch and the traction motor. For the fault detection, analysis of the signal fluctuation during the faulty situation is performed for different scenarios. For getting the computer simulation results of the developed FDI strategy, the powertrain model and the controller of the target parallel HEV are developed to simulate the proposed FDI strategy. Validity and effectiveness of the proposed FDI strategy is shown by the simulation results.

추진장치 성능측정 시스템에 관한 연구

한영재 ( Han Yeong Jae ),김석원 ( Kim Seog Won ),김영국 ( Kim Yeong Gug ),박찬경 ( Park Chan Gyeong ),최종선 ( Choe Jong Seon ),김정수 ( Kim Jeong Su ) 한국센서학회 2003 센서학회지 Vol.12 No.4

한국형 고속철도차량(350Km/h)은 7량 1편성으로 구성되어 있으며, 현재 오송기지에서 본선시운전 시험운행중에 있다. 이 차량에 취부된 여러 장치들의 성능을 확인하기 위해서 다양한 신호를 측정하기 위한 측정시스템이 구축되었다. 이 논문에서는 한국형 고속철도차량의 추진장치 성능측정 시스템에 대하여 서술하였다. 추진장치의 성능측정은 Motor Block의 성능확인에 초점을 맞추고 측정할 위치를 정하였다. 본선시운전 시험을 위해, 철도연에서 자체적으로 상시계측시스템을 개발하였으며, 이 이스템을 통해 추진시스템의 각종 전기신호를 입력받아 분석을 실시하였다. 이를 통해서 개발된 추진시스템의 성능을 확인할 수 있었다. The korean high speed train(350㎞/h), composed of 7cars that are 2 power cars, 2 motorized car and 3 trailer cars, has been developed and is under on-line test. To verify the design requirements about the functions and traction performances of this train, KRRI(Korea Railroad Research Institute) decided to evaluate traction performances of this during on-line test. For this purpose, such as torque, velocity, voltage and current, must be measured. KRRI has developed the measurement system that can be measured vast and various signals effectively. In this paper, we introduces traction performances of korean high speed train. The traction measurement items are focused on the verification of motor block performances. Motor block are consist of 2 motor. For this test, we verified traction performances of korean high speed train.

친환경 차량 구동 모터의 무부하 상태 회전자 초기각 자동 추정 방법에 따른 성능 비교

안태규(Taegyu Ahn),박상민(Sangmin Park) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11

In this paper, the method of automatically estimating the rotor position angle offset in the no-load condition of the interior permanent magnet synchronous motor(IPMSM) used as a traction motor for xEV was implemented, and the output performance according to each method was compared. IPMSM requires accurate rotor position angle offset information unique to each motor for optimized output of the motor. Traditional methods estimate the rotor position angle offset with the motor connected to the dynamo, so for a traction motor with a large size, it is costly and time-consuming to connect the dynamo. Therefore, it is essential to estimate the rotor position angle offset of the motor under no load. Two commonly used methods were implemented to estimate the rotor position angle offset, and each estimation method was applied to compare, analyze, and identify its characteristics.

전동차 DC견인전동기 노후고장률 분석

최규형(Kyuhyoung Choi) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

A reliability analysis is provided for DC traction motors of electrical railways which might have low reliability and short lifetime compared to AC traction motors because they have rotor windings and commutators. The reliability analysis was made using the field reliability data of DC traction motors operating on the electric railways around the Metropolitan area, which have been investigated at the maintenance depot. Failure analysis of these data shows insulation deterioration of windings and flashover over commutator slots induce the failures of DC traction motors. Minitab has been used for the reliability analysis which show that 3-parameter Weibull distributions are good for the simulation of the failure rate distribution of DC traction motors which have been used for more than 20 years. The shape parameters of Weibull distributions are 2.9 for the stators and 2.2 for the rotors of DC traction motors. The results of analysis clarified the failure rate characteristics of DC traction motors in wear out condition.

Cooling System Design Optimization of a High Power Density PM Traction Motor for Electric Vehicle Applications

Zhu Gaojia,Jia Nan,Li Longnv,Liu Tao,Xue Ming,Li Meijun 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6

Due to the high power density characteristics of permanent magnet (PM) traction motors and the strict loading conditions of electric vehicle (EV) engine compartments, the excessive losses inside the motors can elevate rapidly the temperature rises, deteriorate the magnetic property of PMs, limit the output torques, and even cause the overheating damages of the machines. In order to guarantee the operational reliability, it’s of vital importance to research and develop the eff ective, reliable and economical cooling systems for improving the working performances of the PM traction motors. In this paper, the three-dimensional (3D) fl uidic-thermal coupled model of a high power density interior PM traction motor is established based on the basic theory of computational fl uid dynamics (CFD) and numerical heat transfer. The fl uid fl ow and thermal distributions are analyzed based on fi nite volume method (FVM), and verifi ed by experimental results. According to the heating characteristics of the motor, the external water frame structure of the motor shell is modifi ed to improve the cooling effi ciency. Taguchi method is used to optimize the cooling structural parameters, so as to reduce the steady-state temperature rise of the motor. The research work in this paper has certain reference signifi cance for the design and development of high power density PM traction motors used in EV applications.

Novel Strategy for Deriving Torque and Speed Curve of an Electric Bicycle Traction Motor Using Initial Step Analysis

Son Ji-Chang,Lim Dong-Kuk 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.3

In this paper, an initial step analysis (ISA) method was proposed to reduce the calculation time for deriving the torque and speed (TN) curve of an electric bicycle traction motor. The proposed method is based on fi nite element analysis (FEA) and can be eff ectively used in the conceptual design stage, which is the initial design stage. The process of obtaining the TN curve requires repetitive FEA with many steps, which is time consuming. However, ISA utilizes the FEA results conducted by only one step and can drastically reduce the computational cost. The ISA was applied to derive the TN curve of an interior permanent magnet synchronous motor for an electric bicycle traction motor. The results had an acceptable error, and the computation time was reduced by 93.44% compared with result of FEA with suffi cient step. To validate the feasibility of the ISA in a practical electric machine, an interior permanent magnet synchronous motor for an electric bicycle traction motor is manufactured, and the average torque according to the current phase angle is tested and compared with the ISA results. The ISA shows an error rate of less than 5% compared with test result. Additional validation of the ISA is conducted on two other test models, and the TN curves was successfully derived with error rate of 3.83% and 0.80%, respectively. Moreover, the calculation time was reduced by 90.24% and 86.99%, respectively. The proposed method can be said as eff ective and suitable method for deriving TN curves at the early stage of motor design.