The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Harmonic Reduction of Synchronous Generator by Permanent Magnet Shape Deformation

영구자석 형상 변형을 통한 동기발전기 고조파 저감

  • 변범석 (조선대학교 전기공학과) ;
  • 박의종 (조선대학교 전기공학과) ;
  • 김용재 (조선대학교 전기공학과)
  • Received : 2022.09.15
  • Accepted : 2022.12.17
  • Published : 2022.12.31
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Abstract

The harmonics of synchronous generators increase iron and copper loss, which is the cause of fever. For harmonic reduction, the armature winding method is used as a distribution winding, a short pitch winding. In this paper, we want to improve the waveform of the instrument voltage by reducing the harmonics in a new way to the shape of the permanent magnet. The method cuts both ends of the permanent magnet and adjusts the air gap by increasing and decreasing the area according to the set value. By varying the distribution of magnetic flux density, the resulting electromotive voltage and strain were compared. This compares the shape-changing models of permanent magnets and shows an effective deformation method.

동기발전기의 고조파는 철손과 동손을 증가시켜 발열의 원인이 된다. 이를 감소시키기 위하여 전기자의 권선법을 분포권, 단절권을 이용하여 고조파를 감소시키는 방법이 있으나 본 논문에서는 영구자석의 형상을 기존에 연구되었던 방법이 아닌 새로운 형상 변형을 통해 고조파를 감소시키며 기전압의 파형을 개선하고자 한다. 형상 변형 방법으로 영구자석의 양단을 절단하고 설정값에 따라 영구자석의 면적을 증가, 감소시켜 공극의 길이를 조절한다. 이때 자속밀도의 분포를 다르게 하여 이에 따른 기전압과 왜형률을 비교하였다. 이를 통해 논문에 기술된 영구자석의 형상 변화 모델들을 비교하고 가장 효과적인 변형 방법을 나타냈다.

Keywords

Acknowledgement

이 논문은 조선대학교 학술연구비의 지원을 받아 연구되었음(2021).

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