• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.485-487
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• 2003

본 논문은 기설 WSI제 CVT에 대해 전자 과도해석 프로그램((EMTP : Electromagnetic Transient Program)을 통한 모의실험으로 철공진현상 제동저항 크기($0.5{\Omega}$)를 선정하고, 기설 154kV 및 345kV CVT의 철공진방지회로를 제동저항 단독취부 형태에서 과포화리액터와 제동저항을 직렬회로로 구성하여 취부하는 방식으로 개선한 후 실증시험 및 현장적용 시험을 통해 CVT 쳔공진현상 제동여부 확인 및 외함온도 변화추이 비교하여 개선효과를 제시함으로써 WSI제 CVT 고장예방에 기어코자 한다.

• 한국생산제조학회지
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• 제21권1호
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• pp.95-101
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• 2012

An internal type roller ring gear(RRG) system composed of either a pin or a roller ring gear and its conjugated cam pinion can improve the gear endurance from that of a conventional gear system by reducing the sliding contact, while increasing the rolling motion. In this paper, we first proposed the exact cam gear profile and the self-intersection conditions obtained when the profile shift coefficient is introduced. Then, we investigated contact stresses and surface pitting life to fmd characteristics for surface fatigue by varying the shape design parameters. The results show that the pitting life can be extended significantly by increasing the profile shift coefficient.

• 한국정밀공학회지
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• 제13권4호
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• pp.129-135
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• 1996

The area of gear vibration and noise, has recently been the focus of many studies. The proper kinematic and geometric design of gears, the mathematical modeling of gear system are essential for a good design. This work present a gear disign for reducing noise, and practical approaches used for machinery noise reduction slong with the summary of methods available for predicting gear noise in terms of the transmis- sion error, and show a comparative study with other methods. A new tooth profile modification is proposed for reducing vibration and noise of involute gears. The method is based on the use of cubic spline curves. The tooth profile is constrained to assume an involute shape during the loaded operation. Thus the new gear profile assures conjugate motion at all points along the line of action. The new profile is found to result in a more uniform static transmission error compared to not only standard involute profile but also modificated profile therby contributing to the improvement of vibration and noise characteristics of the gear.