In this study, we identify and forecast promising railway static inverter technologies and the
technology taxonomy using patent data analytics. To this end, we identify technology topics …

The railway main transformer is considered one of the most important electrical equipment
for trains. Companies and research institutes around the world are striving to develop high …

An electric motor is a device that changes electrical energy into mechanical energy for
railway vehicles. When developing the electric motor, it used to be developed simply for …

Based on the perspective of smart grid patent, this study crawls the smart grid patent data
from 2009 to 2020, and extracts the hotspots of innovation space in different stages. By …

This paper explores technological innovation capability (TIC) in the field of high speed rail
(HSR). In recent years, identifying technological innovation subjects with high TIC in the field …

To grasp the key characteristics and trends of the rapid development of electric vehicle (EV)
technology and to study the development trajectory and main holders of EV technology, this …

With growing attention being paid to electric vehicle (EV) technology as a response to
climate change, researchers have been actively investigating the classification and …

Recently there has been growing demand for low-electricity consuming transformers and
electric vehicles due to global trend of reducing use of fossil fuels and the role of electrical …

The analysis of patent certificates for the purpose of determining the technologies of an
industry is a method that has been used by experts and researchers of technology …

As automobiles are major contributors to greenhouse gas emissions, the technological shift
towards vehicle powertrain systems is an attempt to lower problems such as emissions of …