• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.49-51
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• 2007

It is as result that study to apply mini magnet nerve curer in peripheral nervous system disease treatment. Design and embodied action power and Control Unit in cylinder form of magnet roof object firstly. Yielded service area about special quality of probe of roof object cylinder style and treatment area dimension and distance of treatment pulse secondly. Embody pulse forming course energy value by Probe's form by third, could embody treatment pulse by disease. Specially, through a special quality experiment, saved Damping pulse torn and treatment pulse form etc. variously. Lately, embodied this to aid a little in disease treatment that follow that there is no invasion that there is no stimulation by medicine development. Go amplitude treatment pulse (traditional magneto-therapy of greatly great that strong) does curative effect greatest at short time and becomes thought that demand is magnified greatly at the future in this research.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.912-913
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• 2015

자동차의 오토 기어를 능동적으로 제어하기 위해 전자기력을 이용한 원통형 선형 보이스 코일 전동기를 설계 하였다. 설계 시 유한 요소 해석 프로그램을 이용해 각 부품의 자기 포화 밀도 및 코일에 인가되는 자속을 계산하여 성능을 예측하였다. 기본모델에 대해 중량을 최소화한 모델을 제작하여 실험한 결과 추력은 기본모델과 비슷한 상태에서 중량이 약 40% 감소하였다.

• Proceedings of the KIPE Conference
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• 1998.10a
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• pp.447-451
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• 1998

This paper conducts a study on a non-contact power delivering system using high-frequency inverter with the purpose of discussing the non-contact electric power transmission characteristics through circuit analysis, magnetic analysis and feasible experiments. In this power delivering scheme, various properties pertaining to the non-contact transformer of the power system such as the design, the core depth, core material, primary side frequency etc. are considered with a view of improving the non-contact power dilivery to the secondary.

• 전기의세계
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• v.28 no.11
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• pp.45-51
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• 1979

Finte element methods are developed for the initial distribution problems which contain the surge potential circuits of high voltage transformer windings. The initial distribution of surge voltages in transformer windings are useful to the work to a practical engineering basis. However, the conventional methods of analyzing them so far are much complicated for practical designs. In this paper, the ability to solve surge potential field problems underlies the development of descreting methods to a lodal capacitive distribution-coefficients for determing the surge voltage relationship among a set of transformer coils. A practical example-the modeling of an antioscillation shield coil winding and hisercap winding is used to illustrate and evaluate these methods.

• Transactions of the Korean Society of Automotive Engineers
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• v.18 no.2
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• pp.48-55
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• 2010

We have development the steering angle sensor using not only detecting parts but also integrating technique with semiconductors for automobile applications. The performance design and analysis of the steering angle sensor for intelligent vehicles is complicated due to variety of parameters. In this study, the performance characteristics of the angle sensor were analyzed using test rig. By means of magnetic induction technique, these new the steering angle sensors showed excellent magnetic characteristics. The detection range of steering angle sensor obtained was ${\pm}800^{\circ}$, the maximum non-linearity is 0.744% Full Span and the temperature range was $-40^{\circ}C{\sim}+125^{\circ}C$. With this conclusive, the inductive angle sensor was quite satisfactory for many applications in intelligent vehicles.

• Progress in Superconductivity
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• v.1 no.2
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• pp.115-119
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• 2000

We designed and constructed a non-destructive evaluation system using an HTS DC SQUID electronic gradiometer. Our DC SQUID electronic gradiometer is composed of two DC SQUID magnetometers. The system included a non-magnetic stainless steel cryostat and a set of coaxial exciting coils, which were used to induce an eddy current in the test piece. We also have calculated the eddy current density produced by an exciting coil in any direction of the testing object. We could compute the eddy current density distribution in 3D. The SQUIDs were computer controlled and the output data from the electronic gradiometer was obtained by using a Labview software.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.15 no.2 s.95
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• pp.156-160
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• 2005

We design a new actuator of 3-axis motion for high performance optical devices. The actuator makes it possible to control the tilting motion by using moving magnet and PCB-coil, which have benefits in price and manufacturing. To predict the characteristics of the actuator, especially the effect of moving magnet, finite element method and electro-magnetic analysis were used. By comparing simulation data with experimental results, we verified the accuracy of the simulation and the superiority of the present.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2000.10a
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• pp.83-89
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• 2000

This paper presents a dynamic modeling and a sliding mode controller for the high-speed / high-accuracy position control system. Selected target system is the wire bonder head assembly which is used in semiconductor assembly process. This system is a reciprocating one around the pivot point that consists of VCM(voice coil motor) as a actuator and transducer horn as a bonding tool. For the modeling elements, the system is divided into electrical circuit, magnetic circuit and mechanical system. Each system is modeled by using the bond graph method and united into the full system. Two major aims are considered in the design of the controller. The first one is that the horn must track the given reference trajectory. The second one is that the controller must be realizable by using the DSP board. Computer simulation and experimental results show that the designed sliding mode controller provides better performance than the PID controller.

• Journal of Korea Society of Industrial Information Systems
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• v.6 no.1
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• pp.70-76
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• 2001

The disc type driver with Nd-Fe-B magnet is one of the servo drivers, which have many applications in various fields. For efficient and easy, it is desirable to be small and thin in its size. However, the driver which uses a conventional wire reel is very difficult to be reduced in its volume. one of alternatives to achieve the above goal is the thick film multilayer winding. The winding method will significantly reduce the total volume of the driver. Therefor this paper proposed the thick film multilayer winding methods and consists of parts: design manufactures, properties and applications.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2015.11a
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• pp.145-145
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• 2015

유도가열 코일 내부의 물질에 비접촉식으로 에너지를 전달하기 위하여 유도가열 코일에는 고주파 대전류를 투입하게 된다. 이러한 결과로 코일 자체에도 상당히 높은 수준의 발열이 발생하게 된다. 따라서 실제적으로 코팅물질의 발열을 위하여 전달되는 에너지 이외에 소모적으로 사용되는 에너지가 어쩔 수 없이 코일에 존재하게 된다. 이는 전자기코일의 효율을 낮추는 역할 뿐만 아니라 안정적인 운전을 저해하는 역할을 하게 된다. 본 논문에서는 전자기 및 온도 해석을 통하여 설계 제작된 유도가열 코일을 투입 전류를 바꾸며 실험하여 각 전류 투입시 코일에서의 발열량 및 온도 측정 결과를 해석 결과와 비교하여 유도가열 코일에 대한 평가를 수행 하였다.