• Title/Summary/Keyword: Vehicle pulse

Search Result 147, Processing Time 0.029 seconds

New control strategy of propulsion system for the Transit Maglev System (자기부상열차용 추진제어장치의 새로운 제어기법)

  • 이은규;최재호
    • Journal of the Korean Society for Railway
    • /
    • v.5 no.4
    • /
    • pp.267-275
    • /
    • 2002
  • The traction drive system for the urban transit maglev system is described in this paper. To control the magnitude and frequency of the output voltage of induction motor transiently, the vector control strategy is generally used. But in case of the traction drive system for the railway vehicle, it is difficult to use the vector control caused by the one-pulse mode in the high speed region. Therefore, this paper proposes the control strategy combined the vector control in the low speed region and the slip frequency control in the high speed region. And also, the overmodulation PWM method is discussed to make the change to the one-pulse mode softly. The performance of the proposed traction drive system is verified by the MATLAB simulation results.

Analysis of leakage factors affecting ECV performance in variable compressor

  • Mahmud, Md. Iqbal;Cho, Haeng Muk
    • Journal of Energy Engineering
    • /
    • v.23 no.4
    • /
    • pp.183-188
    • /
    • 2014
  • Solenoid operated electromagnetic control valve (ECV) using in an external variable displacement swash plate type compressor is widely used for air conditioning control system because of its low energy consumption and high efficient characteristics. ECV controls the entire vehicle air conditioning system by means of a pulse width modulation (PWM) system that supplied from an external controller. Different pressure ports located within ECV has important functions to control the air/refrigerant flow through its internal passages. The flow paths are preciously maintained with acceptable ranges of leakage (gap) between the parts inside it which is followed by effective design and critical dimensioning of its internal features. Therefore, it saves energy losses from the solenoid operation as well as ensures the balance of forces within it. The research paper highlights analysis of the leakages (at different pressure ports) and dimensioning tolerance factors that affects the ECV performance.

Traction Control with Brake Pressure Estimation (브레이크 압력 추정을 적용한 구동력 제어)

  • Kim, S.Y.
    • Journal of Drive and Control
    • /
    • v.10 no.3
    • /
    • pp.1-6
    • /
    • 2013
  • Traction control suppresses the spinning of the driven wheel during drive away or acceleration on slippery road condition. In this study, the estimation method of brake pressure hardly measured is proposed. The estimation method of brake pressure and the brake pressure control with pulse width modulation(PWM) are verified a good performance through experiment. Also, the vehicle simulation on slippery road conditions is validated the applicability of brake pressure control for traction control. The simulation results have showed that the brake pressure can be used the control variable for traction control.

Development of propulsion system for the Urban Transit Maglev System (도시형 자기부상열차 적용을 위한 추진제어장치의 개발)

  • Lee Eun Kyu;Kim Hyung Chul;Song Young Sin;Choi Jae Ho
    • Proceedings of the KIPE Conference
    • /
    • 2002.07a
    • /
    • pp.86-90
    • /
    • 2002
  • In this paper, traction system for urban transit maglev system is proposed. Using vector control strategy to control magnitude and frequency of output voltage transiently is general. But in case of traction system for railway vehicle, it is impossible that adapt vector control because there is one-pulse mode in a high speed region. So this paper proposes the control strategy using vector control in a low speed region and slip frequency control in a high speed region. And also proposes overmodulation method that makesto change in one-pulse mode softly. The performance of traction system will be verified by simulation results using ACSL.

  • PDF

A Study on the Switching Algorithm for IPMSM Speed Control in Railway Vehicle (철도 차량 구동용 IPMSM 속도 제어를 위한 스위칭 알고리즘 연구)

  • Kang, Seong-Yun;Lee, Chang-Hee
    • Proceedings of the KIPE Conference
    • /
    • 2017.07a
    • /
    • pp.286-287
    • /
    • 2017
  • 본 논문은 철도 차량 구동용 IPMSM 제어를 위한 속도 영역별 PWM 알고리즘을 제안한다. 철도 차량의 고속영역 제어는 인버터 전압 이용률을 최대화 할 수 있는 1-Pulse 제어 기법이 요구된다. 그러나, SPWM을 이용한 비동기 1-Pulse 제어는 출력 전류의 불균형을 초래한다. 따라서, 고속영역 제어를 위해 동기화 시킨 후 SPWM을 이용한 1-pluse 제어는 필수적이다. 본 논문에서는 비동기 모드로 제어를 시작하여 과변조 영역 이전에 지령 전압과 삼각파 주파수를 동기화 시킨 후 고속 영역운전을 하는 PWM 알고리즘을 제안한다. 본 논문에서 제안하는 알고리즘은 시뮬레이션으로 검증한다.

  • PDF

Pulse Radar Signal Processing Algorithm for Vehicle Detection (차량검지 시스템을 위한 펄스레이더 신호처리 알고리즘)

  • 고기원;우광준
    • Journal of the Institute of Electronics Engineers of Korea SC
    • /
    • v.41 no.5
    • /
    • pp.9-18
    • /
    • 2004
  • This paper presents a vehicle detecting algorithm using microwave system signals. The Proposed algerian decides the breakpoint of signals using the likelihood criteria. The decided signals are segmented and simplified. The proposed searching algorithm uses the Euclid distance from the weighted signal data. We tested the proposed algorithm to compare with the segmentation which is a method using smoothing and edge detection. We confirm that the proposed algorithm is very useful for detecting vehicles by field test.

The Study of Influence Factor of Head Restraints on the Whiplash by using DFSS (DFSS 기법을 이용한 후방 추돌 시 경부 상해 감소를 위한 머리지지대 인자의 영향성 연구)

  • Oh, Hyungjoon;Seo, Sangjin;Yoo, Hyukjin
    • Journal of Auto-vehicle Safety Association
    • /
    • v.4 no.2
    • /
    • pp.5-10
    • /
    • 2012
  • Whiplash is the most frequent injury among occupants in low speed rear-end car collision. The aim of this paper is to analyze thecorrelation between influence parameters of head restraints and whiplash injury criteria.In this paper, DFSS (Design for Six Sigma) method is used for optimum design of head restrains. Four control factors of head restraints have selected by function matrix method. The effects of the control factors have been experimentally evaluated by using a sled pulse from 16km/h relative velocity which is suggested by KNCAP (Korean New Car Assessment Program). In order to reduce the noise factors of dynamic tests, whiplash tests were repeated twice. By using DFSS, the correlation between control factors and injury criteria has been comprehended.

Design of Drive System for Electric Vehicle (전기자동차 구동시스템 설계)

  • 오진석
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.3 no.2
    • /
    • pp.465-470
    • /
    • 1999
  • This paper presents a design method of driving system for EV(Electric Vehicle). EV driving system consist of batteries, battery interface system and inverter. The power control circuit of the driving system is simple, since only one PWM(Pulse Width Modulation) inverter is used. These test spectrums and waveforms can be used to determine the filter component ratings as well as to compute the harmonics injected into the source. The hybrid control strategy which can reduced harmonic components. The analysis results indicate that the required capacity of the condenser can be reduced with LC filter. In this paper, the design and implementation of the proposed systems are described and some experimental results are given to show the performance of this driving system. The control strategy of the system to available inverter's power and motor's power and torque is discussed.

  • PDF

Control Techniques of Sensorless BLDC Motor Drive for a Vehicle Fuel Pump Application (자동차 연료펌프용 BLDC 전동기구동의 센서리스 제어기법)

  • Tran, Quang-Vinh;Chun, Tae-Won;Lee, Hong-Hee;Kim, Heung-Geun;Nho, Eui-Cheol
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.60 no.10
    • /
    • pp.1858-1864
    • /
    • 2011
  • This paper suggests a control technique of the sensorless brushless DC (BLDC) motor drive for a vehicle fuel pump application. The sensorless technique based on a comparator and a potential start-up method with high starting torque are proposed. The comparator is used to generate the commutation signals in phase with the three-phase back-EMFs. The rotor position is aligned at standstill for maximum starting torque without an additional sensor and any information of motor parameters. Also, the stator current can be easily adjusted by modulating the pulse width of the switching devices during alignment. Some experiments are implemented on a single chip 16-bit DSP controller to demonstrate the feasibility of the sensorless techniques.

Development of Position Detection System using GPS (GPS를 이용한 위치검지시스템 개발)

  • Han, Young-Jae;Mok, Jin-Yong;Kim, Ki-Hwan;Kim, Seog-Won;Eun, Jong-Phil
    • Proceedings of the KSR Conference
    • /
    • 2007.05a
    • /
    • pp.1729-1734
    • /
    • 2007
  • Recently, as the feasibility study shows that trans-Korea railway and trans-continental railway are advantageous, interest in high-speed railway system is increasing. Because railway vehicle is environment-friendly and safe compared with airplane and ship, its market-sharing increases gradually. We developed a measurement system for on-line test and evaluation of performances of KHST. The measurement system is composed of software part and hardware part. Perfect interface between multi-users is possible. Nowadays, position data inputs to pulse signal from wheel. Perfect position measurement was limited to slip and slide of vehicle. This measurement makes up for the weak points, Position Detection System using GPS develops. By using the system, Korean High Speed Train is capable of accurate fault position detection.

  • PDF