• Title, Summary, Keyword: Permanent magnet synchronous generator

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Design of Magnet Shape for Axial-Flux Type Permanent-Magnet Synchronous Generator with Dual Air-Gap (횡자속형 2중 공극 영구자석 동기발전기의 마그네트 형상설계)

  • Choi K.H.;Kim K.S.;Jin M.C.;Hwang D.H.;Bae S.W.;Kim D.H.;Ro C.G.
    • Proceedings of the KIPE Conference
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    • pp.828-831
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    • 2003
  • This paper presents a novel design technique and characteristic analysis of Magnet for dual air-gap axial-flux type permanent-magnet synchronous generator. The process of magnet design is applied to the motor design and steady state analysis considering output voltage waveforms and magnetic flux waveforms. Design and construction of an axial-flux permanent-magnet generator with power output at 60 [Hz], 300[r/min] is introduced. Finite-element (FE) method is applied to analyze magnet shape characteristics. The results of FE analysis show generator is feasible for use with dual air-gap axial-flux permanent- magnet synchronous generator.

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A Study of Analysis for Small Buried Type Permanent Magnet Synchronous Generator Considering Armature Resistance Effect (전기자 저항의 영향을 고려한 소형 영구자석 매입형 동기발전기 정상상태 특성 해석 연구)

  • Hong, Sun-Ki
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.3
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    • pp.380-383
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    • 2012
  • Small permanent magnet generator can be used not only as an emergency power source but also an exciting power source of generator for small generating systems because it does not need the external exciting power source. Especially the air-gap flux density of the buried PM synchronous generator can be increased more than that of the permanent magnet. In this study, the analysis of the small buried type PM synchronous generator is performed. From the phasor diagram considering armature resistance for exact analysis, analytic equations are induced and the efficiency, developed voltage, load current are calculated. The experimental results are compared with the calculated results for the appropriateness.

Design and Analysis of Permanent Magnet Synchronous Generator Considering Magnetically Coupled Turbine-Rotor System

  • Kim, Byung-Ok;Choi, Bum-Seog;Kim, Jeong-Man;Cho, Han-Wook
    • Journal of Electrical Engineering and Technology
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    • v.10 no.3
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    • pp.1002-1006
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    • 2015
  • In this paper, design and analysis of permanent magnet synchronous generator for ocean thermal energy conversion (OTEC) considering magnetically coupled turbine-rotor system is discussed. In particular, the rotor dynamics considering bearing span and journal shaft diameter is highlighted. The two topologies of permanent magnet synchronous generator with magnetic coupling are employed for comparison of computed rotor dynamics and generating characteristics. The analysis results show that the critical speed of the turbine-rotor system is higher when the rotor is coupled by magnetically coupling. Finally, the experimental results confirmed the validity of the proposed design and analysis scheme and successful development.

Permanent Magnet Excited Generator For Gearless Wind Generation Plant

  • Curiac, Paul;Kang, D.H.;Park, D.Y.
    • Proceedings of the KIEE Conference
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    • pp.455-458
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    • 2001
  • This paper presents an axial flux permanent magnet synchronous generator with a high power-to-weight ratio, dedicated for small-scale gearless wind power generation plants. For this purpose, a specific design is necessary to meet the imposed requirements. In this paper the design technique for the specifications is presented. The aim of the paper is also to discuss some of the first obtained test results and the involved demagnetizing problem (i.e. short-circuit).

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Design of Magnetic Slot Wedge Shape for Reducing Cogging Torque in Permanent Magnet Synchronous Generator of Direct Drive Type (직구동 방식 영구자석 동기 발전기의 코깅 토크 저감을 위한 자성체 슬롯 ��지 형상 설계)

  • Moon, Jae-Won;Kim, Seung-Joo;Choi, Han-Suk;Park, Su-Kang;Kim, Bong-Ju;Kwon, Byung-Il
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.26 no.3
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    • pp.80-87
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    • 2012
  • This paper suggests the slot wedge shape for reducing the cogging torque of a direct-drive permanent magnet synchronous generator for a bike. To consider easy coil winding, we applied a structure of open slot for the permanent magnet synchronous generator (PMSG). Because the cogging torque of PWSG with the open slot is very large, we are designed the appropriate specifications of the PMSG by selected the appropriate material of slot wedge and various slot wedge shapes. The prototype model is selected by design theory for reducing cogging torque and maximizing efficiency of PMSG. And the detailed structure design of the model was designed by the loading distribution method. The PMSG models were analyzed by finite element method. Finally, we have suggested appropriate material of slot wedges and its shape which has benefit to further reducing cogging torque and preventing decreasing of the generating power.

Optimal Design of a Direct-Drive Permanent Magnet Synchronous Generator for Small-Scale Wind Energy Conversion Systems

  • Abbasian, Mohammadali;Isfahani, Arash Hassanpour
    • Journal of Magnetics
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    • v.16 no.4
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    • pp.379-385
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    • 2011
  • This paper presents an optimal design of a direct-drive permanent magnet synchronous generator for a small-scale wind energy conversion system. An analytical model of a small-scale grid-connected wind energy conversion system is presented, and the effects of generator design parameters on the payback period of the system are investigated. An optimization procedure based on genetic algorithm method is then employed to optimize four design parameters of the generator for use in a region with relatively low wind-speed. The aim of optimization is minimizing the payback period of the initial investment on wind energy conversion systems for residential applications. This makes the use of these systems more economical and appealing. Finite element method is employed to evaluate the performance of the optimized generator. The results obtained from finite element analysis are close to those achieved by analytical model.

The Comparison of Output Characteristic by the Electro-magnetic Structure Modification of the Axial Flux Type Permanent Magnet Synchronous Generator (종축 자속형 영구자석 동기 발전기의 전자기적 구조 변경에 따른 출력특성 비교)

  • Jung, Tae-Uk;Bae, Byung-Duk;Kim, Hoe-Cheon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.6
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    • pp.42-48
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    • 2011
  • Generally, the structure without the stator core Axial Field Permanent Magnet (AFPM) generator was simple and there was nearly no cogging toque. And because it had the wide driving rate area, it had been being mainly used in the small wind power generation system. However, AFPM generator with non-slotted stator can't generate high voltage at low wind speed due to long air-gap. It is the reason of output efficiency drop. Therefore, in this paper, the AFPM synchronous generator with internal rotor and dual slotted stators for the small wind turbine is studied, and deal with a cogging torque minimization through the determination of optimum pole-arc ratio.

Design Parameter Deduction for Slotless Permanent Magnet Synchronous Motor/Generator (슬롯리스 영구자석 동기 전동/발전기를 위한 설계변수 도출)

  • Jang, Seok-Myeong;Lee, Un-Ho;You, Dae-Joon;Ko, Kyoung-Jin;Lee, Jung-Pill
    • Proceedings of the KIEE Conference
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    • pp.53-55
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    • 2008
  • In high speed applications, the slotless permanent magnet(PM) motors appear an attractive solution, being almost insensitive to magneto-motive force harmonics and to pulse width modulation(PWM) current ripple and exhibiting lower stator iron losses and rotor losses (significant with square wave current control). So, this paper deals with methods for design of permanent magnet synchronous motor/generator.

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A Study on Design and Performance Analysis of a Prototype Permanent Magnet Synchronous Generator (영구자석 동기발전기의 설계 및 시제품 특성 분석에 관한 연구)

  • Oh, Jin-Hun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.7
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    • pp.75-80
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    • 2014
  • The small wind turbines has the merits of setting up with low costs by individuals, and get the energy saving effects that, it has the secured, separate markets from the big range systems, and the developing of it is continuously proceeding. The objective of this paper is to provide the design characteristics analysis of a permanent magnet synchronous generator(PMSG) skewed for magnet of rotor, the main advantage to be explored with the use of a split core design is the reduction in manufacturing costs and its simplicity in manufacture, compared to the manufacturing costs of a core skew PM machine. This thesis is aiming mainly analyzing the characteristics of the prototype to verify through Finite Element Method(FEM) and tests.

Optimal Design and Performance Analysis of Permanent Magnet Assisted Synchronous Reluctance Portable Generators

  • Baek, Jeihoon;Kwak, Sangshin;Toliyat, Hamid A.
    • Journal of Magnetics
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    • v.18 no.1
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    • pp.65-73
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    • 2013
  • In this paper, design and performance analysis of robust and inexpensive permanent magnet-assisted synchronous reluctance generators (PMa-SynRG) for tactical and commercial generator sets is studied. More specifically, the optimal design approach is investigated for minimizing volume and maximizing performance for the portable generator. In order to find optimized PMa-SynRG, stator winding configurations and rotor structures are analyzed using the lumped parameter model (LPM). After comparisons of stator windings and rotor structure by LPM, the selected stator winding and rotor structure are optimized using a differential evolution strategy (DES). Finally, output performances are verified by finite element analysis (FEA) and experimental tests. This design process is developed for the optimized design of PMa-SynRG to achieve minimum magnet and machine volume as well as maximum efficiency simultaneously.