Analysis of dynamic performance and compatibility of electric bus based on real-road data by Yu, Tae Hyun- Major of Mechatronics Engineering Department of Mechatronics Engineering Graduate School Korea University of Technology and Education

Analysis of dynamic performance and compatibility of electric bus based on real-road data BY Yu, Tae hyun Major of Mechatronics Engineering Department of Mechatronics Engineering Graduate School Korea University of Technology and Education 

ABSTRACT

 Many countries around the world are regulating the exhaust gas emission of internal combustion engine vehicles. Along with the spread of support policies for the introduction of eco-friendly vehicles, they try to replace conventional internal combustion engine buses with electric buses in large cities. Buses using electricity have a simpler structure and fewer parts than an internal combustion engine, so they are highly reliable and require fewer maintenance elements. In addition, they do not emit pollutants because they use electricity as power. They have low noise and vibration, so they are easy to apply to big city bus routes. In addition, energy price is cheaper than diesel or CNG, and energy consumption efficiency is also high. However, it takes long to charge the battery, and the replacement cycle is relatively short as well as it is expensive. Accordingly, studies on the application of electric buses to bus routes in large cities are being continuously studied. In this paper, it was analyzed whether large electric buses are suitable for application to bus routes in large cities with congested traffic. To this end, a vehicle simulation model was established based on the component parts and vehicle specifications of the electric bus. Then, the basic power performance of the applied electric bus was analyzed through the established vehicle simulation model. In addition, the actual vehicle correlation verification of the vehicle simulation model established through the chassis dynamometer actual vehicle test was performed. For the analysis of the suitability of electric buses for bus route operation in large cities, a vehicle simulation scenario was established based on the actual road data of the Bangkok in Thailand. Through the verified vehicle simulation model, the suitability of operation of the Bangkok city route in Thailand was verified, focusing on the electric energy consumption efficiency of the electric bus and the mileage per charge. It is expected that the simulation model for verifying the applicability of the electric bus in this paper will be very useful in examining the applicability of the electric bus on the bus routes in large cities.

LINK: http://www.riss.kr/search/detail/DetailView.do?p_mat_type=be54d9b8bc7cdb09&control_no=eec9f9b66a3b918fffe0bdc3ef48d419&keyword=electric%20bus

Simulation Tool을 이용한 위상제어 컨버터의 동작 특성 분석-Operation Characteristics Analysis of Phase Control Converter using Simulation Tool by SU -YEON LIM

 

ABSTRACT 

Presently, the specific gravity of the used field of the AC-AC phase control converter in which the effective value and frequency have got the output of the other alternating current by approving the alternating current used for the motoring and dimming circuit, and etc. As the development of the dimming circuit, controlling the brightness of the illumination by the expansion of the illumination industry market using LED along with the development of the various product using the electric motor including an air-conditioner, refrigerator, washing machine, and etc. Due to the development of an industry as the driving source and etc. Increases. In using the power offset required in the device connected to the output terminal to the object using the phase control, it is due to be convenient. The AC-AC phase control converter uses in order to set the power offset of the load in which the part of the input voltage waveform is not delivered to the load and while a switching occurs for every cycle of the alternating current, that is the input voltage, requiring the power offset which is lower than the input electrode value by lowering the effective value of the output voltage and output current and the power offset taking the load. In this paper, PSIM program and PSpice program were used. PSIM program is the program which it simulates by using the ideal element. PSpice program is the program which selects and can simulate the actually used device By using the single phase control converter and three phase control converter (Y-Y wiring) and three phase control converter (Y-∆ wiring) PSIM program and PSpice program among the AC-AC phase control converter among the simulation program, this paper enforced a simulation and inquired into the difference of two programs.

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https://oak.chosun.ac.kr/handle/2020.oak/15322

Switch Mode Power Supply Topologies, a Comparative Study BY Khoo Ghim Wee School of Science and Technology -SIM University

 

Switch Mode Power Supply Topologies, a Comparative Study Khoo Ghim Wee School of Science and Technology A thesis submitted to SIM University in partial fulfillment of the requirements for the degree of Bachelor of Engineering 2009

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https://www.mediafire.com/file/ykbj71nzexn8s5y/Khoo+Ghim+Wee.pdf/file

Resonance based zero-voltage zero-current switching full bridge converter Rouhollah Karimi, Ehsan Adib, Hosein Farzanehfard Department of Electrical and Computer Engineering, Isfahan University of Technology, Iran

Resonance based zero-voltage zero-current switching full bridge converter 

Rouhollah Karimi, Ehsan Adib, Hosein Farzanehfard Department of Electrical and Computer Engineering, Isfahan University of Technology, Iran E-mail: r.karimi@ec.iut.ac.ir

 Abstract: A zero-voltage and zero-current switching full bridge converter with series resonance tank is presented in this study. This converter is based on standard full bridge topology and a series capacitor is added in the primary side to reset the leakage inductance current without any additional auxiliary circuit. Leakage inductance of the transformer is used as the resonance inductance. Using series resonance tank and applying control pulses with fix frequency, zero-voltage switching for leading leg and zero-current switching for lagging leg is achieved. The output power is controlled using phase shift technique. In the proposed converter, soft-switching condition is attained for wide range of load variation. Due to its high performance and minimum additional components with respect to regular converter, this converter can be applied for medium to high-power applications. Topology and operating modes are discussed and the validity of theoretical analysis is verified by prototype experimental results. 

VIEW FULL TEXT : https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/iet-pel.2013.0301

Space High-Voltage Power Module Wenjie Zhao1*, Yuanyuan Jiang1, Jianchao Wu2, Yonghui Huang1, Yan Zhu1, Junshe An1 and Cheng-an Wan2 1 National Space Science Center, The Chinese Academy of Sciences, Beijing, China, 2 China Aerospace Science and Technology Corporation, Beijing, China

 Space High-Voltage Power Module 

Wenjie Zhao1*, Yuanyuan Jiang1, Jianchao Wu2, Yonghui Huang1, Yan Zhu1, Junshe An1 and Cheng-an Wan2 1 National Space Science Center, The Chinese Academy of Sciences, Beijing, China, 2 China Aerospace Science and Technology Corporation, Beijing, China 

ABSTRACT

With the rapid development of the world’s aerospace technologies, a high-power and high-reliability space high-voltage power supply is significantly required by new generation of applications, including high-power electric propulsion, space welding, deep space exploration, and space solar power stations. However, it is quite difficult for space power supplies to directly achieve high-voltage output from the bus, because of the harshness of the space environment and the performance limitations of existing aerospace-grade electronic components. This paper proposes a high-voltage power supply module design for space welding applications, which outputs 1 kV and 200 W when the input is 100 V. This paper also improves the efficiency of the high- voltage converter with a phase-shifted full-bridge series resonant circuit, then simulates the optimized power module and the electric field distribution of the high-voltage circuit board.

VIEW FULL TEXT: https://www.frontiersin.org/articles/10.3389/fenrg.2021.642920/pdf