• Proceedings of the KIEE Conference
• /
• 2008.04c
• /
• pp.155-157
• /
• 2008

An electric multiple unit(EMU) consists of car body, bogie and brake equipment which is directly related to safety and performance of the motorcar. The blending brake mixed an electric brake and a friction brake is to reduce the energy by applying the restoration energy caused when the motorcar is stopped to car lines and to curtail the maintenance cost by saving the friction brake use. We have developed the advanced EMU since 2004, based on the experiences on the standard EMU in 1999, and we develop the installation which minimizes the use rate of the friction air brake by maximizing the electric brake use in the existing blending brake. We could accomplish the goal by improving the motorcar's Performance and solving the restoration energy's deficit by the friction brake. Actually, when it comes to the test results of standard EMU, except the service brake, in most conditions, we use electric brake to meet the requirements of the necessary brake power, exclusive when the motorcar leaves and stops. Therefore, in this paper, we consider the design concept of motorcar's blending brakes and suggest the way to develop the blending brake using the electric brake maximumly, which is caused by adequately controling the electric brake and the restoration brake.

• The Journal of Economics, Marketing and Management
• /
• v.5 no.3
• /
• pp.1-11
• /
• 2017

E-infrastructural economy for ICT Living-Labs is a need for economic and cultural changes in various types of cars in accordance with the supply of the electric car. Depending on the number of cases by analyzing the supply and demand of electric vehicles among Korea and Northern Europe countries. it was indirectly proved that it makes economic growth. The research design is analyzed with the data and how to respond quickly to focus on the possibility of potential changes to the infrastructure realization and commercialization of government enterprises or electric cars through the ICT Living-Labs in Nordic countries. The data indicates that the leading commercialization emphasize on the development of the electric economic convergence and scalability for electric vehicle. When It shows the time of the infrastructure as ICT Living-Labs being delayed, it lowered growth target results for the development of the electric car industry in the future. All this is from the reason of opening the E-convergence economy over time. It is required that Korea should prepare E-convergence economy. Public regional energy should be present through the consistent selection of development for energy linking E-economy and E-trans distribution. Korea needs to be many difficulties in building the E- infrastructure for ICT Living-Labs. Unlike the Northern Europe it is to prepare the active support of both government and business. The role of the government discovers that the power generation through the quick selection of the industry, as well as to connect with the growth of the smart cities with the EVs industry.

• Proceedings of the KSR Conference
• /
• 1999.05a
• /
• pp.185-191
• /
• 1999

This paper deals with a method to predict the noise level inside metro electric cars running a single-line tunnel at the speed of 80km per hour using ray tracing method, a kind of ray acoustics generally used for a high-frequency and air-born noise analysis. The interior of the car including a under-frame, seats, side doors, end doors, door-pockets, side panels, end panel, a roof panel and so on is modeled. And in order to describe the noise power coming inside, artificial noise sources are designated using sound transmission loss data of each section measured from simple tests and external noise level. The noise level inside the car is calculated and its properties are investigated. The results satisfy the criteria on noise level inside the car.

• Proceedings of the KSR Conference
• /
• 2006.05b
• /
• pp.59-66
• /
• 2006

• Journal of the Korean Society for Precision Engineering
• /
• v.28 no.6
• /
• pp.716-723
• /
• 2011

The battery capacity of electric/hybrid vehicle is much larger than present automobile. For that reason, the connector of Green Car should be designed to transmit the high-electric voltage. In addition, the electromagnetic wave should be shielded to protect communication and signal circuits. In this study, shielding performance of the connector was analyzed through electromagnetic shield analysis, and a connector of Green Car was designed using thermoelectrical analysis, which is capable of transmitting the high-electric power. In the design of connector structure, the improved stability and workability was considered.

• Proceedings of the KSR Conference
• /
• 2000.05a
• /
• pp.634-644
• /
• 2000

The study was carried out about the roof hood structure of power car for Korean High Speed Train. The compatibility for applied material and volume of hood duct was studied using analysis about heat and flow distributions. The materials and volume of duct were mainly determined by output air temperature and flow rate of each electric blocks. This report was described, which focuses on pressure distribution and air temperature within engine compartment of power car.

• KIEAE Journal
• /
• v.13 no.6
• /
• pp.39-44
• /
• 2013

As the use of electric vehicles perspectively increases, infrastructures for charging car batteries need to be properly planned for satisfying new requirements. This study aimed at theoretically investigating the relative laws, size of existing parking lots, and diverse car sizes for suggesting parking places for electric vehicles. In addition, potential problems for changing existing parking lots to new parking lots for electric vehicles were thoroughly considered. Based on the problem recognition, the feasibility, in particular, of the change of existing parking place to new place equipped with electricity charging systems was investigated. The comprehensive reviews and surveys revealed that additional systems for charging electricity need to be developed to be suspended on the ceiling for existing parking lots in order to prevent changing current layout of the space. This system will alleviate the perspective problems when the charging systems are located on the floor such as contamination, electric shock, and damage by cars. Further study will be followed for testing performance of the suggested systems in the actual parking lots.

• Proceedings of the KSR Conference
• /
• 2007.11a
• /
• pp.158-166
• /
• 2007

After constructing the high-speed railroad, KORAIL acquired advanced maintenance techniques about Rolling-stocks. Also RCM theory is applied to maintenance field like as inspection period and method. In the meantime, the development of the maintenance methode for Rolling-stock is slow when it compares to the components and system technology. For this reason KORAIL tries to build the optimal maintenance system which can lead the Rolling-stock maintenance technique. The existing vehicle except High Speed train KTX are separated to electric motor car, electric locomotive, diesel locomotive, diesel car, passenger car and freight car. The inspection period and methode for existing vehicles which mentioned above will be examined and the optimal Rolling-stock maintenance technique will be applied.

• Transactions of the Korean hydrogen and new energy society
• /
• v.22 no.6
• /
• pp.852-858
• /
• 2011

This paper is aiming to estimate the mutual influence of the stack cooling performances with the operation modes of the thermal management system for the hydrogen fuel cell vehicles. The heat capacity of the thermal management system was measured by varying the operating modes such as stack cooling heat exchanger only (Mode 1), stack cooling and electric devices cooling heat exchangers (Mode 2), and stack cooling and electric devices cooling heat exchangers with an operation of the condenser (Mode 3).As the results, Performance of the thermal management system (TMS) at Mode 3 decreased up to 34.0%, compared with the result of the Mode 1. In addition, in order to optimize the performance of TMS, the entropy change of stack cooling heat exchanger using irreversibility analysis technique was analyzed with the relationship between entropy generation and entering air velocity of the thermal management system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2010.05a
• /
• pp.651-654
• /
• 2010

Green Growth and green consume culture is the international trend, the importance of Green Car in one of leading electric car, hybrid electric car are easily accessible from the surrounding. In Green Car, the level in research and development of technology to take advantage of the battery is activated beyond the interest. Accordingly, it is needed to manage and monitor the battery in order to use more efficiently and reliably about the secondary battery of lithium series. In this paper, we propose the design and how to take advantage of technology for managing and monitoring of lithium series battery.