• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.123-126
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• 2000

An elevator system which is a essential equipment for a vertical movement of object, as a property of building, have been drove by various expenditure and purpose. Since developing electrical control technology, control systems are highly developed. An elevator equipment is expended to wide, but a data accuracy acquisition technique and safety predict technique for securing system safety is still basic level. So, objective verification for elevator confidence condition is required absolutely accuracy measurement technique. Therefore, this study is accomplished in order to conquer a method of depending on sense of a manager with a simple numeric measurement data, and construct a logical, analytical foresight system for more efficient elevator management system.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.04a
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• pp.405-408
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• 2004

본 논문에서는 시간과 부하의 변화에 따라 편안한 승차감과 빠른 속도를 가질 수 있도록 다양한 속도 패턴을 제공하는 퍼지 알고리즘을 실제 공정에 적용할 수 있도록 SoC Design을 하였다. 운송 속도와 승차감은 엘리베이터 속도 패턴을 결정하기 위한 두개의 중요한 요소이며, 본 논문에서는 운송능력을 향상시키기 위해 교통량 변화에 맞춰서 저크를 조정하였다. 여기에서 구현된 퍼지 추론 시스템은 2개의 입력 변수와 1개의 출력을 가진 시스템이다. 전반부는 교통량의 변화를 나타내며, 시간 입력에 대해서 사다리꼴 형태의 소속함수를 사용하였다. 후반부는 입력에 대응되는 속도 패턴으로써, 싱글톤이 후반부에 적용되었다. 본 논문에서 구현 Tool 로는 SoC 설계를 사용하였다. SoC 설계는 현재 그 확장성과 유연성에 뛰어난 장점을 지니고 있으며, 제안된 알고리즘을 모듈로 설계하여 프로그래밍과 실행 사이클을 단축시키는 효과가 있다.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.109-111
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• 2008

전동기 구동시스템의 모델링을 위해서는 부하의 부하토크, 관성계수, 마찰계수 등의 정보에 의한 부하 모델링이 반드시 필요하다. 하지만 기본적인 부하모델의 제정수와 단순화된 운동방정식만으로는 기계적 각 부분에서의 발생하는 현상에 대한 해석이 불가능 하다. 본 논문에서는 엘리베이터 도어 구동시스템을 대상으로 기계 해석 분야의 해석 프로그램인 RecurDyn과 전력전자 분야의 시뮬레이션 프로그램인 Simplorer의 Co-Simulation을 통한 부하 모델 및 구동 시스템의 해석 가능성과 해석 범위를 분석하고 실험을 통해 타당성을 검증하고자 한다.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.2
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• pp.163-167
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• 2014

To prove the vibration and speed error problems caused by the nonlinear friction characteristics and load variation of the hydraulic system, a PID speed controller and a load compensation controller for the hydraulic inverter-fed elevator are proposed. The load compensation controller is composed by the PI controller and the speed controller is composed by the PID controller. The P,I and D gains of the control parameters are obtained by the frequency response of system transfer function. The Effectiveness of the proposed controller are shown by experimental results, which the proposed controller yields robustness with load variations and stable and good speed and acceleration responses with less oscillations.

• The Transactions of the Korean Institute of Power Electronics
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• v.10 no.6
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• pp.534-542
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• 2005

This paper proposes the fuzzy logic based vector control method for a Surface Mounted Permanent Magnet Synchronous Motor(SMPMSM) used in the elevators. The gain of a conventional PI speed controller in the elevator drive system can not be usually set high due to mechanical resonances, therefore its performance becomes deteriorated. There have been many methods to solve above problems such as an acceleration feedback in the speed controller. However, the above methods have defects that parameter information is demanded. In this paper', a Fuzzy controller(FC) is adopted in the elevator drive system. The performance of a fuzzy controller is compared with a PI controller in the no load and load conditions by simulation and experiments.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.10 no.3
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• pp.27-34
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• 1996

• NEWSLETTER 전기공업
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• no.93-25 s.97
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• pp.39-42
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• 1993

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.2
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• pp.80-84
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• 2008

In this paper, we have posed contactless power supply method using the contactless transformer with multiple primary winding. Also, the system uses resonant frequency tracking method for safe power supply at the elevator's car. The proposed system has been verified by the simulation using ICA4 and Maxwell. The contactless power transmission system is designed for 5[kW] rate.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.6
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• pp.1523-1528
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• 2008

In this study, the ventilation system of connection passage and elevator hall of underground parking lot in apartment houses is investigated to extract the data for the installation and the application by the experimentation. In case of the elevator hall, actual air exchange rate is predicted fivefold higher than air exchange rate by infiltration and exfiltration. Ventilation system is installed good by supply air and return air. As the next best thing, it is installed by supply air because of IAQ control. The temperature of connection passage and elevator hall uniformly with $7{\sim}8^{\circ}C$, is maintained even if the operating condition of ventilation system is different. Therefore, the installation of the preheater, which is installed at the inlet of ventilation system for the cold draft in winter, is not essential in southern area of Korea.

• Journal of Information Technology and Architecture
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• v.10 no.2
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• pp.273-281
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• 2013

Smart work can classify three types. First, mobile office equipped with a portable computer and connect to the company servers and Intranet via mobile phones. Second, home working using video conference system. Third, smart work center. Smart work has enabled us to work efficiently, to work anytime and to work anywhere, beyond conventional office working. This paper presents development processes of a smart work for After Service Business, especially, for the elevator industry. we called implemented mobile office system "A/S work". A/S work using mobile devices has some advantages as compared with previous system. 1) Before/After photo management function 2) Assessment process of customer satisfaction 3) The work history management app. 4) The inquiry and confirmation function to current status of all workers 5) The group SMS function sending selected workers. 'M' elevator company has used A/S work as efficient smart work system.