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2 Transactions on Environment and Electrical Engineering

2 2020

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Feasibility Check of Electrification in Istanbul Metrobus Line

Gucukoglu Turgay, Sari Haluk, Erhan Koray

Transactions on Environment and Electrical Engineering

2020

Vol. 4, No. 1

7--11

Today, climate change is a significant effect of population growth, especially in big cities. Transport in metropolitan cities is the most important reason for climate change with the contribution of CO2 pollution that threatens human health and the environment. Electrified transport systems can therefore provide a suitable solution to air pollution and health problems. This study investigates feasibility of applying electric buses to Metrobus line in Istanbul. Initially, Metrobus line data regarding to number of vehicles, number of stops, route length is gathered from official Istanbul transportation system to define how much energy is needed for the routes. Then, it is analyzed how to re-charge proposed batteries for allocation of chargers on the stations where is applicable.

Comprehensive Analysis of Pre-Charge Sequence in Automotive Battery Systems

Ozguc Murat Kubilay, Ipek Eymen, Aras Kadir, Erhan Koray

Transactions on Environment and Electrical Engineering

2020

Vol. 4, No. 1

1--6

Electric vehicles (EV) have brought promising technologies for future mobility solutions. As one of the key components of EVs, battery systems have fundamental functions which disconnect the battery during parking and in case of failure. To provide a safe system, specialized high voltage (HV) electromechanical switches are used to perform these major functions such as switch on, switch off or pre-charging. Due to these components can be easily damaged, expensive, heavy and bulky, a solution based on pure semiconductors may be desired to accomplish these operations. Many studies were exhibited on EV battery systems regarding developing solid-state systems for HV switchgear. Developing technology on semiconductor devices allows to make a safety concept based on only solid-state components. This study presents a comprehensive analysis of pre-charge sequences between conventional and semiconductor switchgear to be used in electric vehicle battery systems. Spice simulations are presented to investigate advantages and drawbacks of these systems.