Wireless power transmission system can be applied in various fields such as transportation, home and office appliances, logistic equipment without any wire or contact. SMFIR(Shaped Magnetic Field in Resonance) technology developed by KAIST, can optimize and shape the magnetic field to increase the power and efficiency. That’s why the frequency of 20KHz is currently used instead of 60Hz. In our application of electric bus(called OLEV), electricity is supplied form the road whenever the bus is running or stopping. The power with 100KW is transferred from the ground to the bottom of the vehicle, 20cm apart, while max efficiency is at 85%. OLEV system consists of two equipment which are Pick-up(Receiver) and Power Inverter(Sender). Pick-up installed under bus chassis is in charge of collecting the magnetic field generate by power cable underneath the road and converting it into electricity for vehicle operating power. The power inverter supplies the high frequency electric current into the power line installed underneath the road after changing 60Hz current to the hight frequency current. During wireless charging a vehicle, it will not only prevents users form the electric shock in terms of safety but also give a lot of convenience due to no charging plug and cable. SMFIR technology has the advantage of huge power capacity and high efficiency. It will make a new breakthrough in the commercial service of electric automobiles overcoming the constraints such as battery problems including high price, short operational mileage, long charging time.
Mr. Jung Young-Wan is the CEO of Dongwon OLEV that designs and manufactures the wireless power transmission system to be applied on electric buses, rolling stock, logistic equipment, etc. He participated in R&D project to increase Koran Express Train (KTX) speed as Chief Researcher in Korea Railroad Research Institute(KRRI). He was a board of member of Korean High Speed Rail Construction Authority (KHRC) as Executive Director of Planning Division and Rolling Stock Division. He contributed to launching the KTX project including planning, test and commissioning, operation and maintenance. He spearheaded not only the introduction of high speed trains into Korea, but was in charge of evaluating and reviewing the overall performance of KTX. He graduated from Asian Institute of Technology (AIT), located in Bangkok Thailand, with Master of Science in Computer Application.