• Proceedings of the KSR Conference
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• 2008.11b
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• pp.422-429
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• 2008

The objective of the present study is to develope a propultion unit cooling system for the next-generation High-speed EMU. The propulsion power control unit consists of some IGBT semiconductors. In general, those power semiconductors are very sensitive to temperatures and need a cooling system to keep them at a proper operational conditions in the range of $50{\sim}100^{\circ}C$. In this first year of study, we tried to focuss on the understanding of fundamental technologies for each of the two different cooling systems and collecting basic data for design and manufacturing for both cases. For the water cooling system, a heat sink with multi channels of liquid flow was considered and a model unit was designed and performance test was conducted. For the heat pipe cooling system, a Loop Heat Pipe(LHP) was considered as an element to transport heat from IGBT to environment air flow and a model unit was designed and performance test was conducted. The analysis using SINDA/FLUINT showed that those design parameters are good enough for the LHP to properly operate under a heat load up to around 360W.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1188-1194
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• 2008

To cope with the demagnetization risk of permanent magnets used in Interior Permanent Magnet Synchronous Motors(IPMSM), an accurate iron analysis and thermal analysis are very important. In this research, to calculate thermal increment of IPMSM for high-speed traction motor, we will extract losses of IPMSM considering the condition of field weakening control. Then we will input the calculated losses such as iron loss and copper loss as the thermal sources. Based on magnetic filed and thermal analysis, we will support the design of IPMSM for high-speed train.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.162-168
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• 2008

To predict efficiency of Interior Permanent Magnet Synchronous Motors(IPMSM) and to cope with the demagnetization risk of permanent magnets used in the IPMSM, accurate iron analysis of the IPMSM is very important at the motor design stage. In the analysis, we developed a new iron loss model of electrical machines for high-speed operation. The calculated iron loss was compared with the experimental data. It was clarified that the proposed method can estimate iron loss effectively at high-speed operation.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1172-1181
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• 2008

The industrialized country is progressing the front picture of the High Speed ENU and research for the space design. especially, A Streamline nose design for a technology and competitive power confirmed report is important. This research set up the designing process for a streamline nose model development through scientific assessment. We reflected the needs of the user and presented also a human engineering the space design. This research presented the key point to establish an identity confirmed of a Korea High Speed ENU.

• Proceedings of the KSR Conference
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• 2009.05b
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• pp.535-544
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• 2009

Korea holds the High-speed EMU technique and produced to the forth in the world. Also, Preparing an advance opportunity to the world market. especially, We must develop the Original form individually to have competitive power about industrialized country of a high-speed train. This research proposed a design development process which consider interior design to enhance a line of flow and efficiency from implementation of shape about the Streamline nose.

• Proceedings of the KSR Conference
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• 2009.05b
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• pp.277-282
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• 2009

This research present final Proto-type design of Korean High speed EMU identity establishment. To making Proto-type design; Frist step is extracting design factor which can makes final image of Proto-type. And last, Apply it to the Original-form which was presented by last research. This research is for take one's own identity of korean High speed EMU, and makes originality of design for korean rail-road culture.