scholarly journals Capacitive Coupling Wireless Power Transfer with Quasi-LLC Resonant Converter Using Electric Vehicles’ Windows

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 676 ◽  
Author(s):  
KangHyun Yi
Keyword(s):  
Electric Vehicles ◽  
High Efficiency ◽  
High Capacity ◽  
Wireless Power Transfer ◽  
Capacitive Coupling ◽  
Power Transfer ◽  
Wireless Power ◽  
Very High Frequency ◽  
Large Power ◽  
Coupling Capacitor

This paper proposes a new capacitive coupling wireless power transfer method for charging electric vehicles. Capacitive coupling wireless power transfer can replace conventional inductive coupling wireless power transfer because it has negligible eddy-current loss, relatively low cost and weight, and good misalignment performance. However, capacitive coupling wireless power transfer has a limitation in charging electric vehicles due to too small coupling capacitance via air with a very high frequency operation. The new capacitive wireless power transfer uses glass as a dielectric layer in a vehicle. The area and dielectric permittivity of a vehicle’s glass is large; hence, a high capacity coupling capacitor can be obtained. In addition, switching losses of a power conversion circuit are reduced by quasi-LLC resonant operation with two transformers. As a result, the proposed system can transfer large power and has high efficiency. A 1.6 kW prototype was designed to verify the operation and features of the proposed system, and it has a high efficiency of 96%.

scholarly journals MAGNETIC RESONANCE COUPLING BASED WIRELESS POWER TRANSFER FOR CONTACTLESS CHARGING OF ELECTRIC VEHICLES

2013 ◽  
pp. 36-39
Author(s):  
SHAKTIRAJ KUMAR CHAGANTY ◽  
S.SIVA PRASAD
Keyword(s):  
Electric Vehicles ◽  
High Efficiency ◽  
Wireless Power Transfer ◽  
Electrical Energy ◽  
Power Transfer ◽  
Wireless Power ◽  
Air Gaps ◽  
Electromagnetic Resonance ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling

The availability of a convenient charging mechanism will help greatly in dispersal of Electric Vehicles more widely. The concept of Wireless transfer of electrical energy will make this possible. The feasibility of wireless power transfer for Electric Vehicles by electromagnetic resonance coupling is investigated in this paper. The experiment is carried out on small sized antennas that can be equipped at the bottom of a vehicle. The efficiency characteristics of power transmitted wirelessly are analyzed by varying frequency of power, gap between receiving and transmitting coils and power to be transmitted. The feasibility of wireless power transfer with large air gaps and high efficiency by small sized antennas is proposed and analyzed in this paper.

scholarly journals CONTACTLESS ELECTRIC VEHICLE CHARGING USING MAGNETIC RESONANCE COUPLING METHOD.

2014 ◽  
pp. 112-115
Author(s):  
SHAKTIRAJ KUMAR CHAGANTY ◽  
S.SIVA PRASAD
Keyword(s):  
Electric Vehicles ◽  
High Efficiency ◽  
Wireless Power Transfer ◽  
Electrical Energy ◽  
Power Transfer ◽  
Wireless Power ◽  
Air Gaps ◽  
Electromagnetic Resonance ◽  
Resonance Coupling ◽  
Charging Mechanism

A convenient charging mechanism will be of great help in dispersal of Electric Vehicles more widely. The concept of Wireless transfer of electrical energy will make this possible. The feasibility of wireless power transfer for Electric Vehicles by electromagnetic resonance coupling is investigated in this paper. Using electromagnetic resonance coupling, large amount of power can be transmitted over large air gaps. The experiment is carried out on small sized antennas that can be equipped at the bottom of a vehicle. The efficiency characteristics of power transmitted wirelessly are analyzed by varying - frequency of power, gap between receiving and transmitting coils and power to be transmitted. Power transmission efficiencies at resonant frequencies are investigated. Wireless charging mechanism will make Electric Vehicles more user friendly and also reduce Carbon emissions. The feasibility of wireless power transfer with large air gaps and high efficiency by small sized antennas is proposed and analyzed in this paper.

scholarly journals Design and Implementation of Prototype EMIR for Dynamic Charging of Electric Vehicles

2020 ◽  
Vol 9 (4) ◽  
pp. 113-117
Keyword(s):  
Electric Vehicles ◽  
High Efficiency ◽  
Wireless Power Transfer ◽  
Electrical Energy ◽  
Major Axis ◽  
Receiver Coil ◽  
Power Transfer ◽  
Wireless Power ◽  
Charging Infrastructure ◽  
The Road

Electric Vehicles (EVs) are considered to be one of the most sustainable forms of transportation. Unlike hybrid vehicles or gas-powered cars, EVs run solely on electric power. However, despite their many benefits, EVs are facing major challenges in the market today. The major challenge being its exorbitant costs as compare to fuel-based cars. And, range anxiety also proves to be a hurdle for EVs [6]. Thus, to answer all the aforementioned challenges, we proposed Electro-Magnetic Induction-based Roads (EMIR), a dynamic wireless recharging system. EVs would be able to slip into a special EMIR green lane, recharge their batteries a bit, and slip out. This technology will thus reduce the size of the EV battery, which is the most expensive part of the EV, by increasing its effective mileage and the life of the battery. This paper elaborates on the method of performing dynamic wireless power transfer through resonance based electromagnetic induction. A 163 cm long and a 30 cm wide transmitter coil was designed to transfer electrical energy to an oval-shaped receiver coil with 40 cm as its major axis and 30 cm as its minor axis. The EV battery is dynamically recharged by a charging infrastructure between the road and the vehicle while it is in motion with a high efficiency. The transmitter coils are essentially supposed to be embedded in the road but are placed over the road for visual purposes. The receiver coil is placed under the EV. When the EV goes over the electric road, it gets dynamically recharged. A prototypic EMIR was successfully designed to demonstrate the Dynamic Wireless Power Transfer (DWPT) for EVs.

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