• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.997-1000
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• 1993

This paper proposes the linear induction motor with salient poles, transverse flux and the secondary aluminum conductor for a new type urban MAGLEV. Compared with the more usual kind of linear induction motor with longitudinal flux, TFLIM have flux paths tying transversely to the direction of motion. This shortens the magnetic circuit and produces the thrust, the attraction force and the lateral stabilization force simultaneously. Owing to these electrodynamic force, TFLIM will be usable to a new type urban MGLEV.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• v.4B no.1
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• pp.6-11
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• 2004

The single phase switched reluctance motor (SRM) has many merits; simple structure and driving circuits, easy operation and speed control, and etc. This paper presents the torque characteristics of disk type single phase SRM by changing the salient pole lengths and pole arcs. The prototype single phase SRM has a three dimensional magnetic flux pattern because of its structure. That is, the radial and axial magnetic flux contributes to torque generation. Thus, 3D analysis is required for computation of its magnetic field. In this paper, 3D FEM is used for analyzing the magnetic flux distribution and magnetic co-energy.

• Proceedings of the KIEE Conference
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• 1999.11b
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• pp.24-26
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• 1999

In this paper, the conceptual design and FE analysis results of salient pole type alternator under no load condition are described. The designed alternator's rating is 180kW, 3-phase, 4pole, 380/220V, 0.8pf, 60Hz. The conceptual design is described by the process of designing the armature, field, and obtaining some of equivalent circuit parameters. The comparison of FE analysis to the designed results of alternator's output voltage value shows a good agreement.

• Proceedings of the KIEE Conference
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• 2002.11d
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• pp.73-75
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• 2002

Single phase SRM(switched reluctance motor) is very simple in structure and in driving circuit than three phase SRM. But it can't be started by itself. The prototype of salient pole rotor type single phase SRM was fabricated in former research and the starting device was installed in bottom of the rotor for generating start torque. The starting device is composed of permanent magnet and it is placed the rotor at specific position which is generated positive torque when the prototype is started. Therefore the prototype was started by itself but it is also affected the torque and the speed in operation. On this paper, the influence of the starting device on no-load speed of the prototype was confirmed by measurement of no-load speed according to installation of the starting device or not.

• Journal of KIISE:Software and Applications
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• v.32 no.11
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• pp.1121-1135
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• 2005

This paper proposes a moving object extraction method using the contrast map and salient points. In order to make the contrast map, we generate three-feature maps such as luminance map, color map and directional map and extract salient points from an image. By using these features, we can decide the Attention Window(AW) location easily The purpose of the AW is to remove the useless regions in the image such as background as well as to reduce the amount of image processing. To create the exact location and flexible size of the AW, we use motion feature instead of pre-assumptions or heuristic parameters. After determining of the AW, we find the difference of edge to inner area from the AW. Then, we can extract horizontal candidate region and vortical candidate region. After finding both horizontal and vertical candidates, intersection regions through logical AND operation are further processed by morphological operations. The proposed algorithm has been applied to many video sequences which have static background like surveillance type of video sequences. The moving object was quite well segmented with accurate boundaries.

• Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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• 2000.02a
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• pp.158-161
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• 2000

Generally superconducting generators(S. G.'s) will be classified into 2 types according to their field coil shape. The first one is race-trace type and the other is saddle type. Race-track type S.G.'s have almost the same structure with conventional salient pole generators which are being used as largely small scale machines with more than 4 poles. On the other hand saddle type S.G.'s correspond to conventional cylindrical generators with 2 poles used for large turbines in power plants. In this paper 1MVA S.G. with saddle type field coil is electromagnetically designed and based on the research results from development of 30kVA S.G. with race-track type field oils in our group. other parts such as cooling systems and power leads are presented.

• Proceedings of the KIPE Conference
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• 1998.11a
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• pp.1-4
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• 1998

In this paper, an auto-tuning method for fuzzy controller based on the neural network is presented. The backpropagated error of neural emulator offers the path which reforms the fuzzy controller's membership functions and fuzzy rule, and used for speed control of switched reluctance motor. The experiments are performed to verify the capability of proposed control method on 6/4 salient type SRM. The results show that fuzzy-neural controller is suitable for wide speed range.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.37 no.6
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• pp.361-367
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• 1988

In this study new design method with auxiliary slot on salient pole is proposed for the reduction of cogging torque which is the problem of corm type DC Brushless motor. And FEM(Finite element method) is adapted in trial motor which is designed by the method proposed in this paper. and learn the quantative characteristics of cogging torque. Comparing results of analysis with measurement it is porved that the proposed design has a propriety.

• Bulletin of the Society of Naval Architects of Korea
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• v.12 no.1
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• pp.83-90
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• 1975

In order to establish a stability and buoyancy criteria of a floating vessel, the geometrical property as well as external forces and moments be dealt with. This paper discusses in general terms hidden but more salient factors of forces and moments of both natural and artificial origin, particularly wind, with regard to vessels of more general type such as oil drilling rigs.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.4
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• pp.718-726
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• 1997

The purpose of the study was to investigate the interaction effect of garment formality, Yin -Yang level, and body type of children on impression formation. The experimental materials developed for the study were a set of stimuli (8 color photographs) and a response scale (34 bipolar adjectives) and the subjects were 267 elementary school teachers in Taejon area who were responsible for the first grade students. Results were as follows; The 3 independent variables showed significant effects on impression of the 4 factors (sociability, potency, dynamics, cooperation) of impression. Since body type had interaction effects with garment formality and subject's gender, the two body types were separately analyzed. For the normal body type, only the garment formality affected on impression of cooperation factor But for the large body type, garment formality affected on impression of potency dimension, garment Yin-Yang level affected on social and dynamics dimension, and subject's gender affected on social and cooperation dimensions. The body type was the most salient variables and clothing effects for the large body type was significantly different for the normal body type. It is concluded that the results support the cognitive categorization theory on impression formation.