• The Transactions of The Korean Institute of Electrical Engineers
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• v.64 no.3
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• pp.405-410
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• 2015

This paper deals with the design method of 1kW-Switched Reluctance Generator (SRG) for wind power applications. The coefficient of the output equation is determined according to the purpose specification for design of SRG. Detailed design is carried out, after selecting the outer diameter of the rotor on the basis of the output equation. The generation characteristic of designed generator is verified by using Finite Element Method (FEM).

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.1
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• pp.50-62
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• 2011

In this paper, analytical techniques for performance characteristics analysis of wind power generator with outer permanent magnet rotor are proposed. Furthermore, the proposed analytical techniques are validated by performance experiments of the manufactured generator. In this part, characteristic equations of losses such as copper loss, core loss are derived. Using the derived loss characteristic equations, electrical parameters obtained in [15] and d-q axes method, constant load and constant speed characteristics of wind power generator are analyzed. And then, to analyze performance of wind power system according to wind speed, d-q analysis model considering wind turbine characteristics is proposed. Finally, the obtained performance characteristics results are validated in comparison with those by experiments.

• Journal of the Korean Solar Energy Society
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• v.33 no.6
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• pp.32-38
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• 2013

In an efforts to encourage renewable energy deployment, the government has initiated so called 1 million green homes program but the accumulated installation capacity of small wind turbine has been about 70kW. It can be explained in several ways such that current subsidy program does not meet public expectations, economic feasibility of wind energy is in doubt or acoustic emission is significant etc. The author investigated annual energy production of Skystream 3.7 wind turbine using measured power curve and wind resource data. The measured power curve of the small wind turbine was obtained through power performance tests at Wol-Ryoung test site. AEP(Annual Energy Production) and CF(Capacity Factor) were evaluated at selected locations with the measured power curve.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1005-1007
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• 2005

Small wind turbines are becoming a viable technology option to supply electricity to landowners. These systems provide energy security, product relatively no environmental harm, and in an appropriate setting can be quite cost-competitive with traditional electricity options. This paper is dealing with the methods how to overcome such inconvenience and with the analysis of characteristic and a field test with a prototype of the stand alone wind turbine was performed. The method applies to small systems, equipped with a coreless axial-flux permanent magnet(AFPM) generator in the turbine, a dc-dc converter and batteries. The analysis concentrates on the effect of the load on the power-wind speed curve of the turbine. The system is designed for direct driven, coupled with turbine and generator with a rated power of, 3kW.

• Proceedings of the KIEE Conference
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• 2001.10a
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• pp.249-253
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• 2001

Currently there are very limited amounts of resources and serious amounts pollution. Wind power generation system have an advantage of unlimited and unpolluted amount of energy resource. In this paper, for the application of these characteristic and for the generation to be achieved regard of districts and geographical features the energy continuously. The operation characteristics of system were analyzed through experiments for a trial product.

• Proceedings of the KIEE Conference
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• summer
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• pp.875-877
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• 2004

Research related to renewable energy is urgently required to cope with the depletion of fossil fuel and the environmental pollution. This paper deals with maximum power control of 1kW rating wind power generator. To implement direct-drive generator, axial flux permanent magnet generator is adopted to test the converter. The blade is attached to the surface of outer rotor disk. Generally wind power generator is operated under the rated wind speed. To capture maximum power at my given wind speed, the coordination of generator and converter is essential. Buck/Boost converter is designed to charge 24V battery and under the low wind speed it operates as boost converter.

• Proceedings of the KIPE Conference
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• 2001.07a
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• pp.54-57
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• 2001

Currently there are very limited amounts of resources and serious amounts pollution. Wind power generation system have an advantage of unlimited and unpolluted amount of energy resource. In this paper, for the application of these characteristic and for the generation to be achieved regard of districts and geographical features the energy continuously. The operation characteristics of system were analyzed through experiments for a trial product.

• New & Renewable Energy
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• v.5 no.4
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• pp.29-32
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• 2009

본 연구에서는 소형 플랩을 채용하여 능동하중제어를 이루고자하는 풍력블레이드의 적용을 염두해 둔 에어포일 설계를 수행하였다. 블레이드 팁 부분에 플랩을 적용하고자 하는 경우 플랩의 구동 장치, 연결 부위 등의 장치 설치를 위한 공간이 블레이드 내부에 필요하다. 이를 위하여 기존의 에어포일의 성능을 유지하면서 뒷전의 두께비가 증가된 에어포일 형상의 설계가 필요하다. 최적설계를 위하여는 MIGA(Multi-Island Genetic Algorithm)을 채용하였으며 에어포일의 성능 계산을 위하여는 Xfoil을 결합하였다. 또한 형상 생성을 위하여 Hick-Henne 형상 함수를 이용하였다. 위와 같은 방법으로 설계된 에어포일은 코드길이 85% 위치에서 두께비 6.3%,양항비 133을 가지게 되어 기본으로 설정한 DU180에어포일에 비해 성능과 필요 두께비를 모두 능가하는 에어포일이 되었다.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.37 no.3
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• pp.293-300
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• 2013

This study used a water tank and wave maker to generate conditions similar to the real ocean environment. Given that the waves were properly generated in the water tank, a precise analysis indicated the quantitative value of the wave force acting on a body. A high-speed camera and wave-level gauge were used to measure the temporal wave motion and period. A series of artificial water waves were successfully generated using three different wave periods and amplitudes. Each of the waves captured by a high-speed camera was sinusoidal and did not maintain its shape properly without a wave absorber, but it was substantially improved and well shaped when the wave absorber was installed.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.4
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• pp.527-536
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• 2014

In this paper, the 50kW aerogenerator which is applicable to the microgrid was designed and analyzed by using commercial simulation program Maxwell 2D. Particularly, the suggested PMSG to reduce the cogging torque introduced the offset and skew concept. The suggested optimal value of offset and skew was decided by 2mm and 60 degree of electric angle. The simulation results of the PMSG when load operation condition showed the average harmonic distortion 1.3%, voltage 322.41V, current 94.95A, and iron loss 9.73W, eddy current loss 73.68W, copper loss 3.52kW. The capacity of aerogenerator calculated 61.56kW, and the suggested design process can be applied to higher capacity generator.