• Title/Summary/Keyword: load test

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Parameters Estimation of Five-phase Squirrel-Cage Induction Motor (5상 농형 유도전동기의 정수 추정)

  • Kim, Min-Huei
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.61 no.4
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    • pp.199-205
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    • 2012
  • This paper propose a improved parameter estimations of five-phase squirrel-cage induction motor(IM) for speed control system on field oriented control(FOC). In order to high performance control of ac the motors using a FOC and DTC(direct torque control) algorithm, there are required precise motor parameters for slip calculation, flux observer, controller gain, rotor position and speed estimation, and so on. We are suggest a estimation method of the motor parameters that developing five-phase squirrel-cage IM have a stator of concentrated winding for experimental. There are results of stator winding test, no-load test, locked rotor test, and obtained equivalent circuits using manufactured experimental apparatus. For presenting the superior performance of the speed control system in adapted the parameters, experimental results are presented using a 32-bit fixed point TMS320F2812 DSP with 1.5[KW] IM.

Estimation of Curving Performance and Running Safety of Gwangju Electric Multiple Unit for City Subway (광주도시철도 전동차의 곡선추종성 및 주행안전성 평가)

  • Ham, Young-Sam;Oh, Taek-Yul
    • Proceedings of the KSME Conference
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    • 2004.04a
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    • pp.745-750
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    • 2004
  • For the safety of railway, it should be evaluated for the running safety by measuring the derailment coefficient. Although railway has run the fixed and maintained rail, some of railway is derailed. This report shows the results that performed the static load test, wheelset manufacturing for test, main line running test on the basis of the derailment theory and experience. It is executed main line test into more than 80km/h for estimating the curving performance and running safety of Gwangju EMU. As the test results, could confirm the curving performance and running safety of Gwangju EMU from the results of the wheel unloading, lateral force, derailment coefficient etc. Derailment coefficient was less than 0.8, and lateral force allowance limit and wheel load reduction ratio were enough safe.

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Structure Analysis and Loading Test of Body Structure having Aluminum (알루미늄 구조체의 구조해석 및 하중시험)

  • Yoon Sung-Cheol;Kim Won-kyung;Hong Yung-Ki;Pyun Jang-Sik
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.59-64
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    • 2003
  • This paper describes the result of structure analysis and load test of body structure. The purpose of the analysis and test is to evaluate an safety which body structure shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load and operating condition. Material of body structure applied an aluminum alloy. This strength test is based on 'Performance Test Standard for Electrical Multiple Unit, noticed by Ministry of Construction & Transportation, in 2000' and reference code is JIS E 7105

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A safety evaluation on the loading test of EMU′s carbody having stainless and aluminum (도시철도차량의 스테인리스와 알루미늄 구조체 하중시험에 대한 안전성평가)

  • 정종덕;김원경;홍용기;윤성철;이장욱
    • Proceedings of the KSR Conference
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    • 2002.10a
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    • pp.156-161
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    • 2002
  • This paper describes the result of carbody load test. The purpose of the test is to evaluate an safety which carbody structure shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load and operating condition. Carbody material applied a stainless steel and an aluminum alloy, The stainless steel model is the carbody of a motor car which is delivering to KNR line 1 in 2002 and the aluminum alloy model is the carbody of a motor car which is delivering to GWANGJU line 1 in 2003. This strength test is based on "performance test standard for Electrical Multiple Unit, noticed by Ministry of Construction & Transportation, in 2000" and reference code is UIC 566 and JIS E 7105.

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Estimation of Running Safety of Electric Multiple Unit for Commute use in Incheon International Airport Railway (인천국제공항철도 통근형 차량의 주행안전성 평가)

  • Seo, Jung-Won;Hur, Hyun-Moo;Kwon, Seok-Jin;Lee, Dong-Hyung;Kwon, Sung-Tae;Hong, Yong-Ki;Park, Ok-Jeoung;Ham, Young-Sam
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.56-61
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    • 2006
  • For the safety of railway, it should be evaluated for the running safety by measuring the derailment coefficient. Although railway has run the fixed and maintained rail, some of railway is derailed. This report shows the results that performed the static load test, wheelset manufacturing for test, main line running test on the basis of the derailment theory and experience. It is executed main line test into more than 110km/h for estimating the running safety of Incheon Int'l Airport EMU. As the test results, could confirm the curving performance and running safety of Incheon Int'l Airport EMU from the results of the wheel unloading, lateral force, derailment coefficient etc. Derailment coefficient was less than 0.8, and lateral force allowance limit and wheel load reduction ratio were enough safe.

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Experimental Study on Steel Truss Structure for Safety Lintel in Masonry Construction -Focusing on Door Frame Top Lintel at Typical Floor Apartment- (조적공사 인방보용 강재트러스 구조물에 관한 실험적 연구 - 아파트 기준층 문틀 상단 인방재를 중심으로 -)

  • Kim, Young-Chun;Yoo, Hyun-Dong;Choi, Woo-Jong;Jeong, Sang-Moo;Kang, Myung-Sik
    • Journal of the Korea Safety Management & Science
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    • v.15 no.3
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    • pp.29-35
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    • 2013
  • The research is to verify by experiments whether the steel truss structure is able to withstand the load of cement bricks of upper part of a door for the safe use of lightweight steel truss structure instead of concrete lintel which is to be installed at upper part of door frame in building cement bricks for apartment construction. The steel truss is designed in order not to disturb bricks-building and the shape of structure was verified by bending test. According to experiments result, camber was applied to steel structure that enabled construction work to be improved and was proved effective for the prevention of accidents by cement bricks-building load test.

A Dynamic Characteristics on Non-linear Voltage Electric Equipment under Voltage Sag (순간전압강하에 대한 비선형 저압전기기기의 동적특성)

  • Lee, Hyun-Chul;Jeong, Sung-Won;Gim, Jae-Hyeon;Lee, Geun-Joon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.3
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    • pp.336-343
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    • 2008
  • In this study, a transition of power quality was characterized by non-linear voltage electric equipments under voltage sag. The test was inputted voltage sag to IPC(Sag Generator) from AVR, and then to equipments by IPC which adjust voltage magnitude and duration. The load test which non-linear voltage electric equipments used PLC, Magnetic Contactor, SMPS, HID Lamp. The test result was different from each other according to a manufacturing companys, models, and equipments. PLC was greatly described to be stabilized voltage sag in case of no load then rated load. Magnetic Contactor was made a difference to phase angles on voltage sag, which was $0^{\circ}$, $30^{\circ}$, $60^{\circ}$, $90^{\circ}$. HPD Lamp was described to be stabilized the sodium lamp, and to be unstabilized the metal hailed lamp. The test result was showed CBEMA curve that stand for evaluated responsiveness of voltage sag. This study was tested description to dynamic characteristics on non-linear voltage electric equipment under voltage sag. There was hoped that power system designed the essential particulars.

Simplified Load Calculation and Structural Test for Scale Down Model of Small Wind Turbine Blade according to IEC 61400-2 (IEC 61400-2에 의거한 소형 풍력발전용 블레이드 축소모델의 단순 하중 계산 및 구조 시험)

  • Jang, Yun-Jung;Kang, Ki-Weon
    • Journal of the Korea Convergence Society
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    • v.4 no.3
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    • pp.1-5
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    • 2013
  • This study deals with simplified load calculation and structural testing for scale down model of small wind turbine blade. First, the blade was designed and produced scale down to 0.2 ratio of initial blade. And moments were acquired by simplified load calculation equations according to IEC 61400-2 standard. Also, structural test using weight was conducted to obtain the maximum moment. Therefore maximum moments were compared at calculation and test.

A Comparative Study on Results of Static Pile Load Test of Rock Socketed Drilled Shaft and Bearing Capacity Equations (암반에 근입된 현장타설말뚝의 정재하시험결과와 지지력이론식의 비교)

  • Kim, Won-Cheul;Hwang, Young-Cheol;Hwang, Sung-Sik
    • Journal of the Korean GEO-environmental Society
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    • v.3 no.4
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    • pp.51-58
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    • 2002
  • In Korea, drilled shaft are generally socketed into rock. Driven pile has environmental problems such as vibration and noise, therefore, the applications of the drilled shaft are increasing in Korea. In this paper, static load test data of the rock socketed drilled shaft at Gwangandaero and Suyeong3hogyo are analyzed. The bearing capacities from field test data and theoretical formula are compared and analyzed. From this study, design approaches for drilled shafts in Korea are examined and several suggestions are proposed.

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The study on the Characteristics of Ultimate Bearing Capacity and Major Design Parameters for Single Stone Column (단일 쇄석다짐말뚝의 지지력 특성과 주요 설계 파라미터에 관한 고찰)

  • Chun, Byung-Sik;Kim, Won-Cheul;Jo, Yang-Woon
    • Proceedings of the Korean Geotechical Society Conference
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    • 2004.03b
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    • pp.552-560
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    • 2004
  • Stone column is a soil improvement method and can be applicable for loose sand or weak cohesive soil. Since the lack of sand in Korea, stone column seems one of the most adaptable approach for poor ground as a soil improvement method. However, this method was not studied for practical application. In this paper, the most effective design parameters for the being capacity of stone column were studied. The parametric study of major design factors for single stone column was carried out under the bulging and general shear failure condition, respectively. Especially, a test result of single stone column by static load was compared with the bearing capacity values of suggested formulas. The analysis result showed that the ultimate bearing capacity by the formula was much less than the measured value by the static load test. Especially, the result of the parametric study under general shear failure condition showed that the bearing capacity has apparent difference between each suggested formulas with the variation of the major design parameters. Therefore, the result of this study can be a suggestion which is applicable for the field test and the future research.

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