• Title, Summary, Keyword: synchronous generator

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Performance Analysis of Axial-Flux Permanent-Magnet Synchronous Generator for Wind Power Applications (횡자속형 영구자석 풍력발전기의 운전특성 해석)

  • Hwang, Don-Ha;Kang, Do-Hyun;Kim, Yong-Joo;Choi, Kyeong-Ho;Bae, Sung-Woo;Kim, Dong-Hee
    • Proceedings of the KIEE Conference
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    • pp.143-145
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    • 2003
  • In this paper, wind power system with direct-driven axial-flux type permanent-magnet (PM) synchronous generator, 10 [kVA], 300 [rpm], is presented. In order to analyze the performance of axial PM generator, finite-element (FE) analysis is used, and the 2-dimensional equivalent model is developed. The steady-state and transient-state characteristics are respectively analyzed at no-load and resistive-inductive loads. The test results of driving characteristics are presented as well. The results are very similar to predicted performance of design. Proposed generator is feasible for use with a small-class wind power applications.

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Characteristic Analysis of the 40KVA High Speed Synchronous Generator considering the Power Factor (역률에 따른 40kVA급 고속 동기발전기의 특성해석)

  • Jang, Seok-Myeong;Ko, Kyoung-Jin;Cho, Han-Wook;Oh, Won-Gyu;Park, Young-Tae
    • Proceedings of the KIEE Conference
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    • pp.999-1000
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    • 2007
  • This paper presents the characteristic analysis of the 40 kVA high speed synchronous generator considering the power factor. The generator consist of the rotor with the short-circuited field coils connected armature coils of exciter and the stator with three-phase winding. To analyze the characteristics of the generator, the direct finite element method is applied.

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A Study on Output Characteristic Design of Radial Field Permanent Magnet Synchronous Generator for Urban Wind Turbine (도심형 풍력 발전기용 방사 자속형 영구자석 동기 발전기의 출력특성에 관한 연구)

  • Bae, Byung-Duk;Yun, Seung-Ju;Jung, Tae-Uk
    • Proceedings of the KIEE Conference
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    • pp.1001-1002
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    • 2011
  • Recently, issues regarding environment and the diversification of dependence in oil are watched with keen interest. Wind power attracts most interest because of its high-energy efficiency with eco friendly functions. In this paper, deal with design of radial field permanent magnet synchronous generator for a urban wind power system. Analyzed the RFPM generator by electromagnetic, and designed wind power generator with this. The output characteristic of machine and all of process is analyzed by 2D FEA due to geometrical structures of RFPM machine.

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A Study on the Dual PWM Digital Excitation System of Regeneration Type (회생형 이중화 PWM 방식의 디지털 여자시스템에 관한 연구)

  • Ryu, Ho-Seon;Lee, Joo-Hyun;Lim, Ick-Hun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.9
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    • pp.79-84
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    • 2010
  • This paper discusses the control of generator field using dual IGBT PWM regeneration method to target brushless synchronous generator. If one of PWM bridges happens to fault, it transfers automatically and can be in charge of full load. Also it has an advantage of the operation which UPS connected in parallel with PWM bridge can supply power to excitation system in condition of main power loss. This PWM system supplies field current to generator in one quadrature operation, regenerates field coil energy to main power supplier in four quadrature operation. We designed, manufactured and applied the first trial product at J-power plant.

A Study on the Analysis on the Direct-Driven High Power Permanent Magnet Generator for Wind Turbine

  • Kim, Ki-Chan;Ihm, Hyung-Bin;Lee, Ju
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.3
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    • pp.88-95
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    • 2008
  • In the paper, the permanent magnet synchronous generator of 1.5[MW] output power which is driven directly without gear system is designed by conventional magnetic equivalent circuit method and analyzed by finite element method. We analyzed the characteristics of generator like no load, rated load, short circuit condition and demagnetization of permanent magnet in order to verify the design results by magnetic circuit method. The last, the analysis results of two kinds of rotor types are compared with each other. Especially the THD(total harmonic distortion) of output voltage is examined for the comparison.

Improved back-EMF of 30kW Interior Permanent Magnet Synchronous Generator for Small Hydropower Generation (소수력 발전용 30kW급 매입영구자석형 동기발전기의 역기전력 개선)

  • Kim, Daekyong;Jeong, Hak-Gyun;Park, Han-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.5
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    • pp.660-665
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    • 2014
  • This paper presents the improved back-EMF of Interior Permanent Magnet Synchronous Generator(IPMSM) for small hydropower generator. To improve back-EMF characteristics, the size and position of notch are applied to the rotor. In addition, parametric analysis of the notch size and position was performed. Finally, the back-EMF characteristic analysis are confirmed by the experimental results.

An Improved Operating Characteristics of Surface Permanent Magnetic Synchronous Generator for 5-Phase 5kW (5상 5kW 표면부착형 영구자석 동기발전기 특성개선)

  • Jung, Hyung-Woo;Kim, Min-Huei;Song, Hyun-Jik;Kim, Dong-Hee
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.9
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    • pp.53-61
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    • 2013
  • This paper propose a improved operating characteristics of the 5-phase 5kW within developed the surface permanent mount synchronous generator (SPMSG) in order to make a study of a polyphase ac motors keeping hold of more advantages. The developed manufacturing motor was necessary to do improvement of voltage regulation, efficiency, operating characteristics, and so on at the rated load. There are remake a redesigned and distributed stator winding connection without changing the frames of stator and rotor core in previous established generator by a repeat tests. There are shown a amplitude and waveform of the generated electromotive force, FFT analysis of harmonics within output voltages, and reviewing a experiment results in load of resistive and 5-phase induction motor by variable generator output frequency.

A comparison of speed control of various turbines according to power plant types (발전방식별 여러 가지 터빈의 속도제어 비교)

  • Choi, I.K.;Jeong, C.K.
    • Proceedings of the KIEE Conference
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    • pp.2314-2316
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    • 2001
  • The steam gererator which produces thermal energy from coal or gas is a very important device in power plants, including the turbine driving synchronous generator which transforms kinetic energy into electrical energy. The turbine and the generator are driven by many kinds of media according to the types of which power plants are classified into steam turbine generator, gas turbine generator, water turbine generator and so on. This paper introduces the overspeed protection as well as the various speed and load control methods of some types of turbines.

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An Analysis of Protection Relay Operation During Transient Sate of Generator (발전기 과도현상에 따른 발전기 보호 계전기 동작 분석)

  • Kwon, Young-Jin;Kang, Sang-Hee;Kim, Chul-Hun
    • Proceedings of the KIEE Conference
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    • pp.378-380
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    • 2006
  • Loss of excitation, over excitation and motoring of generator are simulated by using synchronous generator with an exciter and a governor. This paper presents an analysis of transient state of generator and protection relay operation with loss of excitation. over excitation and motoring of generator.

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Characteristic Analysis of a High Speed Permanent Magnet Synchronous Generator considering the Operating Speed (구동 속도를 고려한 고속 영구자석형 동기발전기의 특성 해석)

  • Jang, Seok-Myeong;Ko, Kyoung-Jin;Cho, Han-Wook;Jeong, Yeon-Ho;Oh, Won-Gku
    • Proceedings of the KIEE Conference
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    • pp.116-118
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    • 2006
  • Recently more attention is paid to the development of high-speed permanent magnet (PM) synchronous generators driven by gas-turbine, since they are conductive to high efficiency, high power density, small size, low weight, simple mechanical construction, easy maintenance and good reliability. In this paper, the performance analysis of a high-speed PM synchronous generator for military power application considering the min-max operating speed is presented. The output current and power versus DC-link voltage loci can obtained by solving the PM machine's steady-state equations for variable resistive load.

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