• The Transactions of the Korean Institute of Power Electronics
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• v.9 no.1
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• pp.81-87
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• 2004

This paper describes a design method of electromagnetic interference (EMI) filter for pulse-width modulation (PWM) inverter-fed AC drives used for home appliances such as washing machine and air conditioner. The generating and coupling mechanisms of the conducted EMI for AC drives are first investigated. The design procedure of the EMI filter based on the EMI separation principle is then presented. Experiments we carried out for the PWM inverter-fed induction motor drive system and it is shown that the results satisfy the EN55014 EMI regulation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.429-430
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• 2006

To estimate the fatigue life of flange-shaft assembly, fatigue test for flange material and bending fatigue test for flange-shaft assembly were conducted. Also, finite element analysis for flange-shaft assembly was conducted. Then, we have changed the obtained P-N curve to S-N curve using the finite element analysis results which were stress values at the location of fracture. The S-N curve of flange material itself was almost consistent with that of flange-shaft assembly, so it seems that the fatigue life of flange-shaft assembly could be estimated by using S-N curve for flange material and the stress at the location of fracture calculated by finite element methods.

• Textile Coloration and Finishing
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• v.18 no.2 s.87
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• pp.31-38
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• 2006

Silk fabrics are very popular and widely used because of their elegant appearance. However, silk fabrics generally have easy wrinkle, and do not stretch and deform permanently after machine washing. Then the stretched properties of silk fabrics are important for the application of industrial textile materials such as formal and sports wear. Thus, this research surveys the covering, weaving and degumming conditions for stretched silk fabrics. As a result, yarn breaking stress was reduced with increasing spindle speed, and the yarn twists were optimized under the covering condition of polyurethane/silk with PVA pretreatment. In addition, the shrinkage of the silk fabrics treated with star degumming process was reduced by continuous NaOH degumming process. The fabrics showed the fabric physical properties with optimum stretched properties and evenness surfaces.

• Annual Conference of KIPS
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• 2017.11a
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• pp.534-537
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• 2017

최근 공용 세탁기는 현대인의 필수로 대두 되고 있다. 이를 위하여 임베디드 시스템에 타이머 등의 센서를 부착하여 데이터를 수집하고, 카메라를 이용한 영상 전송 기능으로 스마트 기기에서 현재 예약 및 Data까지 제어 할 수 있도록 하여 기존의 일반적인 세탁기에서 진보 된 스마트 고용 세탁기 사회 문화를 이루고자 한다.

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2001.04a
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• pp.9-25
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• 2001

Fairchild has been developing a new class IPM called SPM consisting of dramatic Packaging technology to achieve the lowest cost rind better performance for low power home appliances and industrial AC drive applications. The first Fairchild SPM development with IGBT 600V/15A for washing machine application started in 1999 and was completed successfully. Fairchild SPMs are going to be the best solution for low power inverter-driven AC drive system after 2001. The new SPM Packages like SPM ∥ and SPIM for the next generation IPM with the highest competitiveness (cost & performance) shall be continuouslly developed.

• Journal of the Korean Home Economics Association
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• v.34 no.4
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• pp.75-86
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• 1996

This study was surveyed to investigate the condition and satisfaction of foodservice environment. the survey was conducted based on an instrument which was developed by reviewing previous research. The instrument was provided to 57 nutritionists at the elementary schools in Taegu area, and its contents include the standard and relevance of kitchen center, the layout type and the standard of satisfaction for the cooking equipment, washing machine, kitchen table and kitchen facilities. Data obtained from survey were analyzed by SAS. These results show that the combination layout type among four types of cooking center in the arrangement gives the highest standard of satisfaction to nutritionists. The amounts of equipment holding are related to its arrangement in the standard of satisfaction.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.9 no.6
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• pp.9-18
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• 2000

This study includes noise automatic inspection system for washing machine auto-transmission one of modern home necessary. We effort to find and certificate sound noise source by sound power and sound intensity, and apply to frequency analysis in vibration related sound noise. still more we have been studying to data acquisition and programming for MS VisualBasic version 5.0. System component is below. 1) Pentium PC or data acquisition. 2) DSO for noise acquisition. 3)S/W for comparison and decision. 4) I/F Board for data communication. Wave form data through the DSO are converting to ASCII code data. The ASCII code through binary converting S/W. Finally we will making noise monitoring system and automatic inspection system.

• Proceedings of the Korea Society of Design Studies Conference
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• 2005.05a
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• pp.54-55
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• 2005

• Annual Conference of KIPS
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• 2014.11a
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• pp.1203-1204
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• 2014

세탁기에서 등속 원운동(uniform circular motion)시 발생하는 힘으로 인해 생기는 소음 및 진동을 트라이포드 수평계(tripod water level)의 자동 수평맞춤 센서 장치, 방진고무(vibration proof rubber)를 장착한 최적의 진동흡수 평판 기구를 설계 하고자 한다. 본 연구의 결과는 세탁기 소음으로 인한 층간소음 문제 해결에 기여 할 것이다.

• Annual Conference of KIPS
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• 2019.05a
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• pp.739-742
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• 2019

기숙사와 같이 여러 사람이 세탁기를 공유하는 상황에서 세탁상황을 알 수 없어 세탁물을 가지고 세탁실에 갔다가 모든 세탁기가 사용 중인 상황이 많이 발생하여 학생들의 불편함이 크다. 이에 본 논문에서는 기존 세탁기를 그대로 사용하고 사물인터넷 기술이 적용된 스마트플러그를 개발하여 서버와 통신하게 하고, EBS(Efficient Book System) 세탁기앱을 통해 세탁상황을 원격에서 알 수 있고, 예약할 수 있으며, 세탁시간을 추천해 하는 시스템을 개발한다. 실제 기숙사 세탁실 세탁기에 적용하여 테스트했으며, 실현 가능성을 보였다.