• Journal of Sensor Science and Technology
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• v.10 no.1
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• pp.33-41
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• 2001

Wire ropes have been widely used in industrial applications, wherever heavy weight should be carried safely or mechanical energy should be transmitted fast. Especially, wire rope failures in operating elevator may lead to extensive property damage and serious injury to nearby personnel. Hence, it is very important to inspect wire rope periodically. Failure defection of wire rope requires fundamental knowledge of wire rope construction, rope behavior, properties of fault, sensing and signal processing method. In this research, the development of a new fault detecting system incorporating Hall-effect sensors to detect flaws such as abrasion, broken wire, corrosion and deformation for aged wire ropes in elevator, is described. For using a detector as a portable instrument, several performances for implementing sensing part with Hall-effect sensor, analog signal processing unit and programs are described. Experiments and field testing results for the implemented detecting system are also given. As a result, it is verified that the detecting system has good efficiency for inspecting faults of aged wire ropes in service.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.171-173
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• 2008

스칼라 제어에 속하는 V/F 방식은 기본파 전압의 실효값과 주파수를 독립변수로 하여 평균적인 토크를 제어함으로 제어가 쉽고 구현이 간단하여 산업계에서 널리 쓰이고 있다. 그러나 주파수의 변화에 따라서 전동기 내부 임피던스도 변화하기 때문에 단순히 주파수만을 가변 하는 것만으로는 약계자에 의한 토오크 부족이나 과여자에 의한 여자 포화등에 의해 역률과 효율이 떨어진다. 또한 순시적인 토오크 제어가 불가능하여 전동기의 고성능 제어가 어렵다. 본 논문에서는 벡터제어를 적용한 엘리베이터 도어용 유도전동기 구동 시스템을 제안하고 실험을 통해 그 성능을 확인하였다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.30 no.1
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• pp.53-61
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• 2016

• Journal of Satellite, Information and Communications
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• v.10 no.4
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• pp.28-31
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• 2015

The elevator is extreme important due to the large size of the building and public facilities. In particular, it occurs bottleneck phenomenon in a elevator in case of using a theater. So, in this paper, we suggests technology of removing the traffics of visitors' movement and increase the efficiency of the use of elevator. Configuration of the proposed technique is divided parts of the processing unit, the movement route of the mobile cover to help viewers to create a route to collect sensor and the sensed data to detect state and a waiting elevator. This was the design and verification of technical performance and implementation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.199-202
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• 2001

An elevator system, which is essential equipment for vertical movement of an object, as a property of building, has been driven by various expenditures and purposes. Since developing electrical control technology, control system are highly developed. The elevator system has expanded widely, but a data accuracy acquisition technique and safety predict technique for securing system safety is still at a basic level. So, objective verification for elevator confidence condition requires an absolute accuracy measurement technique. Therefore, this study is executed in order to acquire a method of depending on sense of a manager with simple numeric measurement data, and to construct a logical, analytical foresight system for more efficient elevator management system. As an artificial intelligence for diagnosis, the fuzzy inference algorithm is used for foreseeing the system in this thesis, because the fuzzy algorithm is the most useful method for resolving subjective ideas and a vague judgment of humans. The fuzzy inference algorithm is developed for each sensor signal(i.e. vibration, velocity, current).

• The Transactions of the Korean Institute of Power Electronics
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• v.4 no.1
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• pp.43-49
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• 1999

We propose a nonlinear feedback controller that can control the induction motors with high dynamic performance and high power efficiency by means of decoupling of motor speed and rotor flux. The nonlinear feedback controller needs the information on some motor parameters. New recursive adaptation algorithms for rotor resistance and mutual inductance which can be applied to our nonlinear feedback controller are also presented in this paper. The recursive adaptation algorithms make the estimated values of rotor resistance and mutual inductance track their real values. Some simulation and experimental results show that the adaptation algorithms are robust against the variation of stator resistance and stator inductance.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.5
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• pp.74-82
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• 2004

This paper describes the speed control of the surface-mounted permanent-magent synchronous motors (SMPMSNM) for elevator drive. The elevator motor needs to be a compact and slim type. Essentially, the proposed scheme uses a vector control algorithm for a speed and torque control and Anti-windup technique is adopted to prevent a windup phenomenon. This system is implemented using a high speed 32-bit DSP (TMS320C31-50), a high-integrated logic device FPGA(EPF10K10TI144-3) to design compactly and inexpensively. The proposed scheme is verified by the results through digital simulation and experiments for a three-phase 13.3[kW] SMPMSM as a MRL(MachineRoomLess) elevator motor in the laboratory.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.06a
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• pp.342-343
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• 2004

조사재시험시설내 풀 ($3{\times}6{\times}10\textrm{m}^3$) 속에는 풀과 핫셀간에 조사재 및 연료를 핫셀로 이송할 수있는 버켓 엘리베이터(bucket elevator)가 설치되어 있다. 허용하중은 1톤이고, 버켓의 제원은 $25{\times}25{\times}150\textrm{cm}^3$ 이다. 버켓의 상하 운동은 체인구동 시스템으로 약 63도의 경사도를 갖고 움직이며, 체인은 사각 튜브의 내측면에 고정되어 있는 상하 가이드 레일 사이에서 특수 제작된 체인이 로울러 슬라이딩 방식으로 버켓의 lug를 잡고 상하로 움직이며 핫셀 작업대(working table) 하부에 설치되어 있는 스프로켓 휠(sprocket wheel)에 감기어 구동하도록 되어 있다.(중략)

• 전자공학회논문지 IE
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• v.44 no.4
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• pp.35-40
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• 2007

Recently, buildings are constructed increasingly higher and even more people are using elevators every day. Therefore, more efficient means of vortical transportation are required. Most of high-rise buildings is equipped with elevators. Unlike one elevator system, a multi-elevator system requires a function, which can distribute multiple elevators effectively. This paper examines a multi-elevator system, which has been modeling mathematically, in order to reduce waiting time and use elevators more effectively.

• 정보화사회
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• s.109
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• pp.14-18
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• 1997

2000년 1월 1일이되면, 어쩌면 증권, 은행, 보험 등 모든 금융 시스템은 마비되고 심지어는 엘리베이터나 세탁기까지 엉뚱하게 작동하는 대 혼란이 발생할지도 모른다. 이러한 심각한 우려는 점술가나 사이비 종교지도자의 혹세 무민적인 예언이 아니라, 미리미리 대비하지 않을 경우 현실로 닥칠 필연적 사실이라는데 더 큰 문제가 있다.