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임양수,백형래,Lim, Yang-Su,Baek, Hyung-Lae 전력전자학회 1996 전력전자학회지 Vol.1 No.1
The common drive method of the single phase induction motor(SPIM) is to install a start capacitor and a centrifugal switch in series with the auxiliary winding. In this paper, the phase angle voltage sequence controller is proposed to eliminate a start capacitor and a centrifugal switch of SPIM. In comparison with the capacitor start system of SPIM, the proposed control system shows that it contributes to saving the starting current about 57% and to improving of the starting efficiency of SPIM. The proposed starting characteristics of the SPIM is obtained with this strategy through simulation and experimental results.
소음과 불꽃을 제거한 단상유도전동기의 아날로그식 기동기 설계
박수강(Su-Kang Park),조금배(Geum-Bae Cho),백형래(Hyung-Lae Baek),임양수(Yang-Su Lim),이성길(Sung-Kil Lee),임종연(Jong-Yeun Lim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This research used triac that is semi-conductor that act to static contact to overcome happened shortcoming been using mechanical centrifugal force switch usually. Detect starting current of single phase induction motor and decided moving time. Therefore, could improve life of switch semipermanently. Also, wish to reduced impact that electric motor suffers at the starting moment and do stable starting which there is no life improvement and noise of electric motor itself, arc.
가변 위상각제어에 의한 에너지절감형 단상유도전동기에 관한 연구
박수강(Su-kang Park),백형래(Hyung-lae Baek),이상일(Sang-il Lee),임양수(Yang-su Lim),최낙일(Nak-il Char) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
This paper describes a simple but effective method for energy saving af ac motors having a widely variable load. The proposed method is based on an optJmal efficiency control which is operated by voltage-current pattern such as to maintain the maximum efficiency on the efficiency-output characteristics of the motor, in voltage control with triac. In this paper, authors present the experimental results of the SPIM under controlling of current of main and auxiliary winding by using a one chip microcontroller. Experiments are focused on a capacitor stating single phase induction motor the optimal energy saving are proved by the proposed method.
이창헌 ( Chang Heon Lee ),양수지 ( Su Ji Yang ),임유미 ( Yu Mi Lim ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 무등산국립공원을 이용하는 탐방객들을 대상으로 국립공원의 서비스 만족도를 측정하기 위해 원효사, 증심사, 만연사 지구로 나누어 설문조사를 실시하여 분석한 결과이다. 서비스질을 측정하기 위해 신뢰성, 확신성, 유형성, 공감성, 대응성을 기반으로 23개 평가 문항을 구성하였다. 조사 결과 서비스 만족도는 보통(3.24) 정도였으며 증심사와 만연사가 같았고 원효사 지구가 낮았다. 탐방객들은 공원 청소 관리 상태, 문화자원에 대한 관리, 공원 관리자의 용모와 복장에 만족하고 있으나 공원 내 식당 및 기념품점의 가격, 주차료와 문화재 관람료 등을 따로 징수 등에 대하여는 불만을 나타냈다. This study is a result from the survey analysis of service satisfaction in the areas of Wonhyosa, Jeungsimsa and Manyeonsa of Mudeungsan Nat. Park. The survey asked the visitors about 23 questions based on reliability, assurance, tangibles, empathy and responsiveness. The service satisfaction level was middle (3.24). It was same in the areas of Jeungsimsa and Manyeonsa but low in the area of Wonhyosa. The visitors were satisfied with the cleaning status of the park, the culture resource management, and park rangers` appearance and attire. They complained about the food and souvenir prices of restaurants and shops in the park. They were also unhappy that they had to pay the separated fees for parking their vehicles and admission to the cultural assets.