• Title/Summary/Keyword: Electric propulsion

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Response Characteristic Analysis using Modeling of Propulsion System for 8200 Electric Locomotive (8200호대 전기기관차 추진시스템 모델링을 이용한 응답특성분석)

  • Jung, No-Geon;Chang, Chin-Young;Yun, Cha-Jung;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.11
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    • pp.1640-1646
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    • 2013
  • Conventional power conversion unit that is a major part of the propulsion system has applied GTO thyristor as a switching semiconductor device of main circuit since introduction of the 8200 electric locomotive. But problem that quick maintenance is difficult and its cost is increasing occurs because major components of the power conversion unit are slowly discontinued. To solve these, in this paper, it was analyzed the response characteristic of the propulsion system modeling of the 8200 electric locomotive using IGBT which is applied recently to ensure propulsion control technology. As results of response for a Propulsion system modeling, it show that a power conversion unit is controlled by PLL(Phase-locked loop) and SVPWM(Space Voltage PWM) respectively.

A Study on the Noise and Vibration Analysis of 200kW PMSM for Electric Propulsion Ship

  • Cho, Yang-Uk;Kang, Gyu-Hong
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.4
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    • pp.389-393
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    • 2014
  • This paper presents one of the methods for design to reduce the noise and vibration of 200kW motor for electric propulsion ship. One of the important factors affecting vibration of the motor is the resonance. The natural frequency and natural mode of the 200kW motor is analyzed by using FEM tool and impact test equipment to avoid the resonance. Also, compare FEM result with impact test result to make a reliable FE model of 200kW motor. In order to find out the effect of the noise and vibration of the motor by electromagnetic excitation force, conduct electromagnetic-structure coupled analysis. These characteristics are much useful to design 200kW motor for electric propulsion ship.

A Study on the Speed and Torque Control of Propulsion Motor for Electric Propulsion Ship by Direct Torque Control (직접토크제어에 의한 전기추진선박의 추진전동기 속도 및 토크제어에 관한 연구)

  • Kim, Jong-Su;Oh, Sae-Gin;Kim, Seung-Hwan
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.6
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    • pp.946-951
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    • 2009
  • An induction motor based on DTC(Direct Torque Control) is being increasingly used in various industrial applications. DTC offers faster torque response and better speed control with lesser hardware and processing costs in compared with other controlled drives. This study was to evaluate performance of DTC for induction motor of electric propulsion ship. The simulation results indicated good speed and torque response from the low to middle speed range. Also, DTC has advantages such as the independency on motor parameter.

A Study on Electric Power Propulsion System for Small Ship Outboard (소형선박 선외기용 전기동력 시스템 연구)

  • Park, Joo-Sik;Won, Jun-Hee
    • Journal of the Korea Safety Management & Science
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    • v.19 no.4
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    • pp.309-316
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    • 2017
  • Recently, the outboard engine system of internal combustion engine is widely used in the field of small ship propulsion. However, the internal combustion engine has serious problems of energy depletion and environmental problems, so electric propulsion methods are being studied. In this paper, we have developed important motors and controllers of electric propulsion system for small marine outboard motors. The motor design was performed through the motor characteristics analysis method, and the 30Kw system was developed through the BEMF processing circuit and the power conversion circuit by the embedded microprocessor. This study was carried out through government supported projects and achieved quantitative targets through accredited institutions.

Propulsion System for Moon Explorer (달탐사위성 추진시스템)

  • Han, Cho-Young;Lee, Ho-Hyung
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2008.05a
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    • pp.155-158
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    • 2008
  • Development of Moon Explorer-1 (orbiter) is supposed to be commenced in 2017 and launched in 2020. In case of Moon Explorer-2 (lander), it would be slated to start in 2021 and launch in 2025. For this reason it is taken for granted to investigate a fundamental propulsion system for a Moon Explorer. In this paper conceptual feasibility and comparison studies are proposed for the propulsion system applicable to a Moon Explorer. Availability of monopropellant/bipropellant/electric propulsion system is compared and analysed as well with precedents overseas. As a result possible candidates for a Moon Explorer propulsion system are suggested.

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Flight Test of Hybrid Propulsion System for Electrically Powered UAV (전기동력 무인기용 하이브리드 추진시스템 비행시험)

  • Park, Poomin;Kim, Keunbae;Cha, Bongjun
    • Journal of the Korean Society of Propulsion Engineers
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    • v.17 no.4
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    • pp.49-55
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    • 2013
  • This paper deals with the flight test of propulsion system of middle size electrically powered UAV (EAV2, Electric Aerial Vehicle 2) which is under development in KARI. EAV2 is low speed endurance type UAV whose wing span is 6.9 m, and weight is 18 kg. The UAV has flown for 22 hours in June of 2012. The flight test result showed that the propulsion system worked well suppling power for any circumstances during the test flight. Each power source worked according to the design purpose.

Overseas Research Trends of an Electric-Pump Cycle for Application in Upper-Stage Propulsion Systems (상단 추진 시스템에 적용을 위한 전기펌프 사이클의 국외 연구 동향)

  • Ki, Wonkeun;Lee, Jaecheong;Lee, Hyoungjin;Roh, Tae-Seong;Huh, Hwanil
    • Journal of the Korean Society of Propulsion Engineers
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    • v.24 no.1
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    • pp.64-77
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    • 2020
  • An electric-pump cycle, which is a propellant supply system for driving pumps of a liquid rocket engine using an electric motor, has the advantages of simple system configuration and easy control of supply flow rate and pressure. This paper investigates and analyzes the overseas research trends of the electric-pump cycle. In addition, the research and development country, performing organization, application, engine thrust, pump pressure increase, motor power, and rotation speed are summarized. Among them, the design variables of the overseas research that applied the upper-stage propulsion system with the thrust range of 0.445~2.2 kN could be used in the study of a similar electric-pump cycle in Korea.

Development and Testing of Next Generation Electric Vehicle Propulsion System (차세대전동차 추진시스템 개발 및 시험)

  • Lee, Jang-Mu;Lee, Han-Min;Kim, Gil-Dong;Kno, Ae-Suk
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.2194-2195
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    • 2011
  • The propulsion system of next generation electric vehicle is different from the structure and control methods compared with conventional induction motor vehicles by applying an interior permanent magnetic synchronous motor. Permanent magnet motor should be controlled by each individual motor, propulsion device have 1C1M structure by a single inverter to control a single motor.

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Power Characteristic Analysis of Assumed Short Circuit Instance of Electric Ship Propulsion System (선박용 전기추진시스템의 단락상정사례의 전력특성 분석)

  • Jeon, Won;Wang, Yong-Peel;Jeong, Jong-Hwa;Lyu, Sung-Kak;Jung, Sang-Yong
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.2
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    • pp.323-329
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    • 2008
  • This paper deals with modeling and characteristic analysis of a large-powered electric ship propulsion system. Particularly, system modeling in accordance with the required shipping performance, building-up the equivalent circuit and the power analysis based on load flow have been performed. In addition, abnormal operating condition of short-circuit network is considered for investigating the safety of system components under the over-load condition. Furthermore, protective device like circuit breaker has been specified in order to make the entire system operate normally in case of short-circuit emergency.

Suppression of the Thrust Loss for the Maximum Thrust Operation in the Electric Propulsion Ship (전기추진선의 최대추력 운항을 위한 추력손실 억제에 관한 연구)

  • Kim, So-Yeon;Youn, Young-Doo;Sul, Seung-Ki
    • Journal of the Society of Naval Architects of Korea
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    • v.44 no.3 s.153
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    • pp.238-247
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    • 2007
  • This paper presents the thrust loss suppression algorithm in the electric propulsion ship. The thrust loss due to cavitation can be regarded as the disturbance torque. The disturbance torque is estimated by means of the disturbance observer. Considering the estimated disturbance torque, the speed reference of the propeller is modified to suppress the thrust loss. The experimental results which performed in the cavitation tunnel with electric machine operating system and its controller will be shown to verify the proposed algorithm.