• Title/Summary/Keyword: Regenerative braking

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Research of PWM Modulation for Regeneration Braking of BLDC Motor (BLDCM의 회생제동을 위한 스위칭 방식에 관한 연구)

  • Kim, Yong-Hyu;Park, Sung-Jun;Jung, Jun-Hyung;Kim, Dong-Youn;Kim, Jang-Mok
    • The Transactions of the Korean Institute of Power Electronics
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    • v.20 no.2
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    • pp.193-199
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    • 2015
  • This paper proposes a regeneration braking algorithm for Brushless DC (BLDC) motor system. The unipolar switching method has a limitation about the regeneration braking when the BLDC motor is operated in the low speed region. The proposed algorithm alternatively utilizes the unipolar and bipolar switching method to implement the regeneration braking for overall speed range. The bipolar switching method is used when the BLDC motor is operated in the low speed region. The switching transition point is determined by analyzing the unipolar and bipolar switching during the regeneration braking. The effectiveness of proposed algorithm is verified by using the experimental results.

Electric railway vehicles using regenerative power and Improvement (전기철도차량 회생전력 활용 및 개선방안 - 서울도시철도 회생에너지 발생 및 활용을 중심으로 -)

  • Lee, Jun-Sang;Park, Jong-Hun;Kim, Jin-Young;Kim, Gi-Chun
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.368-376
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    • 2011
  • An Electric railway system has the characteristics. The train powered by substations generates regenerative power when it runs on railway of various slope. A regenerative braking is an ideal system on account of reducing mechanical braking as well as recycling the energy. This study dealt with the line gradient review, train running records and power data out of substations in a bid to establish the efficient regenerative energy storage system.

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Analysis of regenerative power substations, railway (도시철도 변전소 회생전력 분석에 관한 연구 - 서울도시철도 전력공급소 전력분석을 중심으로 -)

  • Lee, Jun-Sang;Park, Jong-Hun;Seo, Suk-Chul;Kim, Jin-Young;Kim, Gi-Chun
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.3117-3123
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    • 2011
  • An Electric railway system has the characteristics. The train powered by substations generates regenerative power when it runs on railway of various slope. A regenerative braking is an ideal system on account of reducing mechanical braking as well as recycling the energy. In this study, Seoul Metropolitan Rapid Transit (substation) Precision analysis of the power of the electric car was carried out. Through this use of power substations, power supplies and trains through the regenerative power of the data analysis was performed utilizing research-based work.

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A Study on Reduction of Energy and CO2 Emission by Using Regenerative Energy of Electric Vehicle (전동차 회생 에너지활용에 따른 에너지 및 CO2 절감 분석에 관한 연구)

  • Kim, Chul-Sub;An, Cheon-Heon;Lee, Byung-Song;Lee, Hi-Sung
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.9
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    • pp.85-96
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    • 2010
  • The recent environmental protection trend requires more strict energy saving, therefore every transportation system should reduce energy consumption to the minimum value. High-efficiency operation system, energy saving and $CO_2$ emissions shall be addressed as important issues in railway system. These issues are the most essential factors of railway, compared to major public transportation system. Recently, saving energy in the electric railway system has been studied. The efficient use of regenerated energy is considered to save energy. Namely, Using regenerative energy is that to store the energy generated during braking and discharge it again when a vehicle accelerates. Reusing energy stores and discharges energy, consequently enables a complete exchange of energy between vehicles, even if they are not braking and accelerating at precisely the same time, as is most frequently the case in everyday service. This paper analyzes effects of energy saving and $CO_2$-cut by using regenerative energy of electric vehicles.

A Study of Dynamic Behavior in Braking States of Tilting Train (틸팅 차량의 곡선 주로 주행 시 감속에 따른 동적 특성 연구)

  • Lee, J.H.;Park, T.W.;Kim, Y.K.;Kim, S.W.;Hwang, C.H.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.11a
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    • pp.151-154
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    • 2005
  • Tilting train improves a traveling velocity through giving a tilt the car-body without ride comfort deterioration In curve. Dynamic behavior in deceleration will show quite another feature in constant velocity, In this study, we see through the dynamic behavior due to a variation of braking force in Korean Tilting Train. Hence we compose of 3D dynamic model, as well as we check upon the property in service braking condition and unique braking condition with a fault system. This study has the meaning with reference data of developing Korean Tilting Train test traveling.

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A study on dynamic behavior in tractive and braking states of tilting train (틸팅차량의 견인 및 제동 상황시의 동적 특성에 관한 연구)

  • Park, J.Y.;Jung, I.H.;Lee, J.H.;Park, T.W.;Kim, S.W.;Kim, Y.G.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.11a
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    • pp.1107-1111
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    • 2004
  • Tilting train improves a traveling velocity through giving a tilt the car-body without ride comfort deterioration in curve. Dynamic behavior in acceleration or deceleration will show quite another feature in constant velocity. In this study, we see through the dynamic behavior due to a variation of tractive force and braking force in Korean Tilting Train. Hence we compose of 3D dynamic model, as well as we check upon the property in service tractive condition and unique tractive condition with a fault motor. Besides we check upon the property in service braking condition and unique braking condition with a fault system. This study has the meaning with reference data of developing Korean Tilting Train test traveling.

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Braking Performance Analysis and Inspection of High Speed Train (고속철도 차량의 제동성능해석 및 검증)

  • Lee, Sung-Ho;Kim, Young-Kuk;Kim, Seog-Won;Park, Jin-Bae
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.982-987
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    • 2006
  • In general, the braking system of high speed train has an important role for the safety of the train. To stop safely the train at its pre-decided position, it is necessary to combine property the various brakes. Generally high speed train has adopted a combined electrical and mechanical (friction) braking system. Electrical brakes are consist of rheostatic brake, regenerative brake and eddy current brake and mechanical brakes are composed of disc brake, wheel disc brake and tread brake. In this paper, we introduce braking performance analysis and inspection though simulation and research to reduce braking distance.

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A Study of Improving Regenerative Energy Utilization in Urban DC Railway Systems Through Sharing Substations (철도 변전소 공유를 통한 직류 도시철도 시스템 회생에너지 이용률 향상 방안 연구)

  • Jung, Seung-Min;Lee, Han-Sang;Byun, Gil-Sung;Kwon, Sae-Hyuk;Jang, Gil-Soo;Jung, Ho-Sung;Kim, Hyung-Chul
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.12
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    • pp.2392-2396
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    • 2011
  • This paper deals with the power integration of large urban railway systems to improve regenerative energy utilization. Current regenerative energy utilization is low because there is no special plan for using this energy. If the railway system is integrated with other railway systems, the efficiency is expected to be improved. Through the case studies, to find the realistic effect of integrated operation, real system for the Seoul Metro lines, especially line 5 and 7, had been applied.

A Study on the Energy Saving Strategy in Electric Railway System (직류 전기철도 에너지 절감방안 연구)

  • Choi Byung-Woon;Chang Sang-Hoon;Kim Hak-Ryun
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.676-681
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    • 2005
  • The regenerative braked cars are being introduced in DC electric railway for energy saving. There has been a recent tendency for DC traction substation with regenerative inverter to increase in number. This is strongly related to the desire for effective utilization of electric power regenerated by DC electric cars and to the aim ensuring stable operation of regenerative braking system. The regenerative inverters DC power feed back from a generative car into AC power at a substation and supplies it to distribution lines. This paper suggest the result of characteristic analysis and capacity simulation. economical analysis in the regenerative inverter system.

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Four Quadrant Drives of Electric Vehicle by Two Quadrant Chopper (2상한 쵸퍼에 의한 전기자동차의 4상한 운전)

  • Shin, Jong-Han;Sung, Nark-Kuy;Lee, Seung-Hwan;Kang, Seung-Wook;Kim, Yong-Joo;Han, Kyung-Hee
    • Proceedings of the KIEE Conference
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    • 1996.07a
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    • pp.473-475
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    • 1996
  • In this paper, bilateral variable-ratio dc chopper system for electric vehicle is proposed. We present the method which is able to simplify the main synthetic chopper circuit by selecting among the forward powering, forward regenerative braking, backward powering, and backward regenerative braking only by control signal. By conducting the experiment with separately excited dc motor, it is confirmed that two quadrant chopper can drive four quadrant operation.

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