• 전기학회논문지
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• 제62권8호
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• pp.1108-1114
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• 2013

This paper presents a new winding topology for MW class offshore wind generator having modular and dual 3-phase. Based on proposed simplified relationship between magnetic flux and phase current in the air gap, several new windings for modular and dual 3-phase are made. In case of one inverter operation or faulty operation, the proposed model can have balanced 3-phase induced voltage whereas the conventional generator with modular winding has unbalanced induced voltage, which can be important issue in offshore generator. The model was applied into 6MW prototype machine with dual 3-phase. Using finite element analysis, induced voltage, inductance were investigated. The results show that the proposed modular winding can be applicable to dual inverter system with electrically balanced voltage.

• 조명전기설비학회논문지
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• 제27권6호
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• pp.23-30
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• 2013

This paper shows the method of winding connection and the balance of three phase of dual inverter systems used for offshore wind power generator. In order to satisfy low cost manufacturing of large scaled wind generator, the number of slot per pole per phase should be reduced. For this reason, in this research, the number is selected as '1' which is the minimum number that stator can have. Based on the prototype machine, three types of machine for the analysis are selected, and various performances especially in terms of electrically balanced condition are also investigated. Moreover, in this paper, new inductance modeling of dual 3-phase considering cross-coupling between two inverter systems is proposed. The several inductances such as mutual-, synchronous inductances are studied. By using FEA, based on calculated the flux linkage of d and q-axis, the validity of the proposed inductance modeling is confirmed.

• 전기전자학회논문지
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• 제24권2호
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• pp.441-445
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• 2020

효율 및 제어성이 우수한 영구자석 전동기는 최근 자동차 조향장치 시스템용으로 많이 응용되고 있으며, 인버터 고장 발생 시에도 일정시간 운전이 가능하여 안전성과 신뢰성을 확보할 수 있도록 다양한 형태의 이중 3상 구조의 고정자 권선방법을 적용하고 있다. 본 논문에서는 진상 및 지상의 전류위상 변화 시 각각의 권선방법이 전동기 특성에 미치는 영향을 유한요소해석을 통해 분석하고, 그 결과 이중 3상 고정자 권선을 갖는 동기전동기 설계 시 특성 측면에서 가장 적절한 권선방법을 선정할 수 있도록 설계전략을 제시한다. 구체적으로 토크 및 효율 측면과 약계자 제어를 통한 정출력 영역 확대 측면, 그리고 저진동 및 저소음을 위한 토크 리플 저감 측면에서 각각 유리한 권선방법을 제시한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 추계학술대회 논문집 학회본부
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• pp.273-277
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• 1989

This paper concerns to drive Induction Motor with open delta winding, and improve general performance, speed response, operation region and flexibility of control, etc. And a control algorithm, which reduces large zero-phase current at this operation, is presented.