• 제목/요약/키워드: Traction characteristics

검색결과 249건 처리시간 0.031초

이송중인 웹과 롤러간의 마찰 특성에 관한 실험적 연구 (An Experimental Study on the Characteristics of Friction Between a Moving Web and a Roller)

  • 권순오;신기현;한영호;김효섭
    • 한국정밀공학회지
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    • 제18권5호
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    • pp.165-170
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    • 2001
  • In the continuos process systems, traction between a moving web and rollers is one of key mechanisms for the study of major issues including the distributed control of tension, guiding, wrinkling, winding, and scratching. Energy is transferred from the driven rollers to the web and from the web to the idle rollers through traction. The characteristics of friction play major role in the determination of the traction force between the moving web and the rollers. In this paper the characteristics of friction between the moving web and the rollers are studied. A procedure to determine the friction coefficient between the moving web and rollers is developed. An experimental setup to validate the procedure is devised. Experimental results showed that the value of traction coefficient decreases as the operating web speed increases and increases as the operation web tension increase.

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바이모달 저상굴절차량용 견인전동기 설계에 관한 고찰 (A study of traction motor for Bimodal low floor vehicle)

  • 최열준;박영호;최종묵;목재균
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2007년도 춘계학술대회 논문집
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    • pp.911-915
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    • 2007
  • This paper deal with the design concept of traction motor for Bimodal low floor vehicles that are CNG(Compressed Natural Gas) hybrid bus and Fuel-cell bus. The design concept of the traction motor is studied in terms of electrical characteristics and mechanical construction. Finally, this paper introduces the characteristic of the traction motor for low floor vehicles which are applied in the world, and mentioned the detail design concept of traction motor.

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철도용 IGBT인버터를 위한 최적 PWM기법 (An Optimal PWM Strategy for IGBT-based Traction Inverters -)

  • 황재규;김영민;장기호
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 1998년도 창립기념 춘계학술대회 논문집
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    • pp.442-449
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    • 1998
  • Since it is essential for traction motors to reduce size and weight to achieve given traction effort, they need high input voltage. But the lack of input voltage occurs periodically due to the characteristics of train system. Therefore traction inverters use over-modulation PWM to maximize inverter's voltage gain. On the other hand, IGBT inverters can use higher frequency twice than GTO ones, which resulted in the need for novel optimal synchronous PWM strategy. This paper suggests that linearly-compensated overmodulation/optimal synchronous PWM strategy and also the simulation results of the method for a real traction motor-intertia model are presented.

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A Design of Prototype 1C2M Railway Vehicle Propulsion Control System Considering Slip Reduction of Traction Motor

  • Chang, Chin-Young;Kim, Jae-Moon;Kim, Yoon-Ho
    • Journal of Electrical Engineering and Technology
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    • 제10권1호
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    • pp.429-435
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    • 2015
  • This study proposes a re-adhesion algorithm that has stable traction effort for rolling stock slip/slide minimization when deliverable traction decreases by slip. The proposed scheme estimates appropriate reference speed using two encoders for reducing slip and controls traction effort stably and has stable control characteristics for disturbance. The algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force stably controls traction effort and gives rolling stock excellent acceleration and deceleration characteristics. And a slip sensing element that can quickly detect slip is used. Load motor and inverter were checked in various slip conditions for creating various line conditions.

박형구조를 갖는 매입형 동기전동기의 인덕턴스 산정 및 특성해석 (Analysis of Inductance and Reluctance Torque Characteristics for Thin-Type IPMSM)

  • 김기남;양해원
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제53권10호
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    • pp.602-609
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    • 2004
  • This paper presents electro-magnetic characteristics of an Interior type Permanent Magnet Synchronous Motor (IPMSM) for traction applications. The importance of instantaneous electric propulsion capability for high torque has been highlighted in the present study and thus parametric analysis is performed by Finite Element Method (FEM). The paper provides analytical & experimental results, which demonstrate a performance of the studied traction motor The goal of this paper is to present a maximum power performance for traction motor which works extension of its own rated power. Experimental results meet well with FEM analysis of traction motor owing to inductance difference.

Study On Mechanism of Dielectric Breakdown in Polyimide Film

  • Tong, Laisheng;Zhang, Xueqing;Wu, Guangning
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 추계학술대회 논문집 전기물성,응용부문
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    • pp.3-8
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    • 2004
  • The Pulse Width Modulation (PWM) Inverter plays an important role in express locomotive. Especially after traction motors are fed by fast switching inverters, the interturn insulation is destroyed more heavily. However, a new type of polyimide corona resistant film is developed and used in insulation of traction motors. In order to investigate the service life of this kind of traction motor, the mechanism and characteristics of dielectric breakdown of polyimide corona resistant are studied in the paper. Experiments have been carried out on specimen according to the condition of traction motor. The breakdown point of tested sample film is analyzed through energy spectrum analysis and electron microscopic photograph. At last, it is presented that the characteristics and mechanism of breakdown of polyimide corona resistance film.

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한국형 고속전철 전동기 온도 특성 (Temperature Characteristics for Traction Motor of Korean High Speed Train)

  • 한영재;김기환;이태형;구훈모;김정철
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.265-267
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    • 2006
  • There are various elements that have influence on safety and reliability of high-speed railway vehicles. Among them, mechanical characteristics of traction motors are very important. Therefore, we verified that temperature characteristics have influence on damage and durability of these parts. We designed a measurement system for temperature test, and could measure the temperature of each device by the system. As the result of temperature test, we could confirm that the traction motors on Korean High-Speed Train satisfy the criteria. From this test, we get information of the traction motor about the temperature characteristic during running speed and running time.

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고속철도차량 전동기의 열적 특성 연구 (A Study on Temperature Characteristics for Traction Motor of High Speed Railway)

  • 한영재;김석원;김상수;김기환;구훈모;최종선;김정수
    • 한국전기전자재료학회논문지
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    • 제19권12호
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    • pp.1123-1127
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    • 2006
  • There are various elements that have influence on safety and reliability of high speed railway. Among them, mechanical characteristics of traction motors are very important. Therefore, we verified that temperature characteristics have influence on damage and durability of these parts. We designed a measurement system for temperature test, and could measure the temperature of each device by the system. As the result of temperature test, we could confirm that the traction motors on Korean High-Speed Train satisfy the criteria. From this test, we get information of the traction motor about the temperature characteristic during running speed and running time.

Study on Motor Characteristics due to Deviation of the Wheel Diameters with Parallel Operation

  • Lee, Hyung-Woo
    • Journal of Electrical Engineering and Technology
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    • 제8권1호
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    • pp.106-109
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    • 2013
  • It is desirable and advantageous to feed parallel propulsion with induction motors by a single voltage source inverter. However, effects of deviation of the wheel diameters on motor current, rotor speed and torque should be also considered for parallel operation. In order to understand the behavior and characteristics, a simple simulation model is developed by using a commercial Matlab Simulink. From the results, it is clear to manage the diameter deviation of the wheels which are connected to traction motors.

A Study on Traction System Characteristics of High-Speed Train

  • Han, Young-Jae;Kim, Ki-Hwan;Seo, Sung-Il;Park, Chan-Kyoung;Han, Seong-Ho;Kim, Jong-Young;Kno, Ae-Sook
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2003년도 ICCAS
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    • pp.1724-1726
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    • 2003
  • Korean High-Speed Train (350km/h), composed of 2 power cars, 2 motorized car and 3 trailer cars, has been developed and is under trial test. To verify the design requirements for the functions and traction performances of the train, KRRI (Korea Railroad Research Institute) decided to evaluate traction performances of the train during trial test. For this purpose, torque, velocity, voltage and current must be measured. KRRI has developed a measurement system that can measure vast and various signals effectively. In this paper, we introduce traction performances of Korean High-Speed Train. The traction measurement items are focused on the verification of motor block performances. Motor block consists of 2 motors. By this test, we verified traction performances of Korean High-Speed Train.

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