International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 11 | Nov 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 525 ELECTRIC VEHICLEWIRELESS CHARGING OVER STOPPAGES FOR EXTENDED RANGE K.Sowmiyaa 1 , K.Sabarinathan 2 and R Saravanan 3 1 Professor Electricals and electronics Department, IFET College of Engineering, India 2,3 Student, Electricals and electronics Department, IFET College of Engineering, India ------------------------------------------------------------------------***------------------------------------------------------------------------- Abstract-Magnetic-coupled wireless power transfer technology is widely used in wireless charging for electric vehicles (EVs). The simulation model of WPT charging system for EVs. The magnetic fields from different sights and the E- field strength when the wireless power transmission system is working are simulated and judged by comparing with International Committee on Non- Ionizing Radiation Protection (ICNIRP) guidelines. The current and the voltage of the transmitter coil and receiver coil are given in this paper. Power grid harmonic is also evaluated as the working frequency is offset. Keywords: magnetic field, power transfer 1. INTRODUCTION In order to save energy and reduce environmental pollution, electric vehicles (EVs) have been greatly promoted by countries all over the world. However, storage battery capacity and high cost of charging infrastructure restricts the development and application of electric vehicles. As a novel technology, applying the wireless power transfer (WPT)can release these limitations well. WPT has four commonly used technologies. The microwave WPT and the laser WPT can be carried out in long-distance wireless transmission of energy, the application range is greatly limited due to its shortcomings such as strict transmission directivity, low efficiency of energy conversion and great harm to living organisms. Inductive WPT technology has the advantages of large transmission power and high transmission efficiency, but it also has shortcomings such as short transmission distance and high energy transmission directivity. By means of large transmission power, high transmission efficiency, long transmission distance, low energy transmission directivity, and little impact on living organisms, the magnetic-coupled wireless power transfer technology has gradually attracted great attention from researchers, became the main method of EV’s charging 1.1 Basic concept of wireless power transfer Inductive Coupling Inductive or Magnetic coupling works on the principle of electromagnetism. When a wire is proximity to a magnetic field, it generates a magnetic field in that wire. Transferring energy between wires through magnetic fields is inductive coupling. If a portion of the magnetic flux established by one circuit interlinks with the second circuit, then two circuits are coupled magnetically and the energy may be transferred from one circuit to another circuit. This energy transfer is performed by the transfer of the magnetic field which is common to the both circuits. In electrical engineering, two conductors are referred to as mutual-inductively coupled or magnetically coupled when they are configured such that change in current flow through one wire induces a voltage across the end of the other wire through electromagnetic induction. The amount of inductive coupling between two conductors is measured by their mutual inductance. Figure 1 Circuit 1 Inductive coupling with four component fluxes. Power transfer efficiency of inductive coupling can be increased by increasing the number of turns in the coil, the strength of the current, the area of cross-section of the coil and the strength of the radial magnetic field. Magnetic fields decay quickly, making inductive coupling effective at a very short range. 1.2 Inductive Charging Inductive charging uses the electromagnetic field to transfer energy between two objects. A charging station sends energy through inductive coupling to an electrical device, which stores the energy in the batteries. Because there is a small gap between the two coils, inductive charging is one kind of short-distance wireless energy transfer. Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electrical