• Title/Summary/Keyword: VVVF Control

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A study on refurbishing VVVF Inverter for train of Busan metro line 2 (부산도시철도 2호선 VVVF 인버터 개량 연구)

  • Hwang, Hyun-Gyu;Park, Hee-Chul;Lee, Eun-Kyu;Kwon, Sun-Bum
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.1407-1413
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    • 2011
  • This paper studied on the VVVF Inverter for 1C4M propulsion system of railway traction. The paper includes the comparison along a VVVF Inverter electric power conversion element for an electric railcar(GTO, IGBT). These inverters are composed of high power IGBTs and controlled by compact control units. The stack is simplified and optimized by using plate bus and IGBT driver units of hybrid-type.

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A Mock Running And Transient State Test of Propulsion VVVF Inverter for Electric Locomotive using A Inertia Load (관성부하를 이용한 전동차 추진용 VVVF 인버터의 모의주행 및 과도상태시험)

  • 정만규;서광덕
    • The Transactions of the Korean Institute of Power Electronics
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    • v.4 no.6
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    • pp.491-499
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    • 1999
  • This paper is on the high perfonnance propulsion IGBT VVVF inverter adopted new technique for railways. To prove the high performance and stabilit~r of traction, running tests are carried out under the simulated condition alike real field. The tests are perfonned on not only a steady states but also a transient states such a as input voltage variation using inertia load equivalent to 160tons train. The vector control technique is a adopted to improve traction for 4 motors. The low switching synchronous PW1\l method based on a space v voltage vector modulation is pro\XlSed as the optimal method for propulsion system railway. The output voltage l is controlled continuously to six step by prolxlsed ovennodu]ation technique without sudden torque variation.

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IGBT VVVF INVERTER AS A PROPULSION SYSTEM FOR ELECTRIC CAR (전동차 견인용 IGBT VVVF 인버터)

  • Chung, E.S.;Park, Y.H.;Jang, K.H.;Lee, S.J.;Bae, B.H.;Kim, J.S.;Kim, S.H.
    • Proceedings of the KIEE Conference
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    • 1997.07a
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    • pp.373-375
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    • 1997
  • In this paper, we present IGBT VVVF inverters as a 1C1M propulsion system for electric car. These inverters are composed of high power IGBT's and controlled by compact control units. The control unit performs full digital control by using 32bit DSP and microcontroller. By using CAN-bus, high speed network is constructed within four control units. The stack is simplified and optimized by using plate bus and IGBT driver units of hybrid-type.

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Automatic control problems of VVVF converter-based variable-frequency type air (VVVF기를 기초한 가변식기압급수설비의 자동제어 문제)

  • 박용규
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.468-468
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    • 1991
  • The variable-frequency type water supply equipment, which adopts the variable-voltage and variable-frequency converter(VVVF converter) to govern automatically the rotating speed of a pump, can save 15-20% of power, as compared with a throttle-controlled pump device or an airpressurized water supply equipment, and is finding a wide application. However, it still has some disadvantages : greater pressure fluctuations during switching over the pump and prolonged low-effeciency running of the pump in the case of small consumption of water. Therefore, it is difficult to apply the equipment to the fire water supply system where the water should not be put into use unless a fire takes place, and the water pressure in pipelines should permanently remain constant. This paper introduces the automatic regulation principle of the variable-frequency type air-pressurized water supply equipment (hereafter referred to as simply BFQS equipment) for dual purposes of daily life and fire control, which combined both technologies of speed governing by a converter and air-pressurized water supplying, then discusses some problems related to automatic control, and finally gives the experimental results of an embodiment-BPQS-100-50 water supply equipment.

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The Study of Manufacture and Inertia Load Test of Inverter for Electrical Multiple Unit (전동차용 VVVF 인버터 제작 및 시험)

  • 한영재;김길동;박현준;이은규;한경희
    • Journal of the Korean Society for Railway
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    • v.3 no.1
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    • pp.1-11
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    • 2000
  • In this paper, the IGBT VVVF inverter for 1C4M propulsion system of railway traction is studied. The inverter is consisted of IGBT stacks, a DB unit, and a control unit. The test results of the combined system is given, which shows an excellent performance of the overall system.

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The characteristic analyses and output frequency tracking control of a high frequency inverter (고주파 인버터의 특성해석 및 출력주파수 추종제어)

  • 이종무;김영석;조기연
    • 제어로봇시스템학회:학술대회논문집
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    • 1987.10b
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    • pp.597-602
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    • 1987
  • This paper proposes a voltage-fed high frequency resonant inverter having variable voltage variable frequency(VVVF) control function. VVVF control is performed by PWM-TRC method in the boost type chopper and PFM-TRC method in the high frequency resonant inverter. This circuit is suitable for induction heating and melting power supply in industry. The operating characteristics of this inverter are discussed from a theoretical point of view. The results of operating characteristic analyses are given leading to complete designing data.

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Data Acquisition and Analysis for Running Performance Evaluation of the Electric Train (전동차 주행성능평가를 위한 데이터취득 및 분석)

  • Lee, K.W.;Kim, M.Y.;Baik, K.S.;Shim, J.B.;Chang, S.H.
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1099-1100
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    • 2006
  • The running of the electric train are done by powering, breaking and coasting. Powering to start and accelerate the rolling stock means driving the three-phase electric induction motors controlled by VVVF inverters which are connected to overhead power line directly(DC) or indirectly(AC, DC/AC). Breaking is achieved by blending control which is the proportional combination between regenerative breaking of VVVF inverter and air pressure control of breaking operating unit(BOU). Therefore, Data obtained during two operation are very important items to evaluate the running performance of RS. This paper has investigated in real time data acquired from VVVF inverter and measured by pressure sensor directly connected to air breaking line(motor car and trailer car). By analyzing data in the region of time and frequency, fundamental methods for eavaluating the running performance of RS quantitatively and objectively have been suggested.

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A Running and Transient state Test of VVVF Inverter using A Inertia Load in Electric car (관성부하를 이용한 전동차용 VVVF인버터의 모의주행 및 과도상태시험)

  • 정만규;정기찬;고영철;방이석;서광덕
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.282-286
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    • 1999
  • This paper presents a vector control of parallel drive, a beatless control and a low switching PWM technique for the propulsion system of Electric car as transient state which are included interrupting line voltage, changing line voltage slowly, suddenly, regenerating light load and starting from backward running. Improved performance and a validation of proposed method is shown by the experimental results using a 1.65MVA IGBT VVVF inverter and inertia load equivalent to 160 tons electric cars through a running and transient state test.

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Current Fed H.F Inverter Topology with VVVF Function (VVVF 기능을 가진 전류형 고주파 인버터 회로 Topology)

  • Lee, Bong-Seop;Kim, Dong-Hee;Shin, Soo-Kug;Gu, Tae-Guen;Bae, Gi-Hun;So, Jung-Hun
    • Proceedings of the KIEE Conference
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    • 1996.07a
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    • pp.321-323
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    • 1996
  • In this paper, it introduces a several circuit type of current-fed Full Bridge high frequence inverter with VVVF function. These inverter circuit presents various output control method according to on/off signal pattern of switches. also, It is certify that the accordance of characteristics is compared theoretical waveform with experimental results according to each signal pattern.

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An IM Driving Power Electronic System Simulation using DNT and Simulink (DNT와 Simulink를 이용한 유도전동기 구동용 전력전자 시스템 시뮬레이션)

  • Moon-Ho Kang
    • Journal of Institute of Control, Robotics and Systems
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    • v.5 no.1
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    • pp.25-32
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    • 1999
  • 교류전동기 구동을 위한 산업용 전력전자 시스템은 전력회생용 양방향 컨버터, VVVF 인버터, 교류전동기 벡터제어기, 및 다양한 전기ㆍ기계적 연계 장치들을 포함하는 전기기계 복합시스템 특성을 지니기 때문에 전체 시스템에 대한 컴퓨터 시뮬레이션이 용이하지 않다. 일반적으로 이러한 복잡성을 해결하기 위한 방안으로서 시스템을 근사화시키고 이에 대한 수학적인 등가모델을 유도한 후 이를 이용하여 시뮬레이션을 행하고 있지만, 이 경우 실계통의 다이나믹특성을 정확히 표현할 수 없기 때문에 시뮬레이션 신뢰성이 저하될 수 있다 본 논문에서는 가변구조 제어기법에 의해 역률1 제어기능을 갖는 PWM 컨버터, VVVF 인버터 및 유도기 간접벡터제어기 둥을 포함하는 유도전동기 구동전력전자 시스템을 다이나믹 노드 기법(Dynamic Node Technique DNT)과 시뮬링크(Simulink)를 이용하여 실제회로 구성상태와 유사한 형태로 시뮬링크 윈도우상에서 설계하고, 이를 통해 시뮬레이션을 행할 수 있는 기법을 제시한다. 시뮬레이션 결과를 통하여 전력전자 시스템의 특성과 제시된 다이나믹 노드 기법과 시뮬링크를 이용한 시뮬레이션 기법의 유용성을 보였다.

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