Electric vehicle battery charger controlled by magnetic core reactor to Wireless Power Transfer system

Abstract

Abstract-This paper presents a control process and frequency adjustment based on the Magnetic Core Reactor prototype. For the past decades, there has been significant development in the technologies used in Wireless Power Transfer systems. In the Wireless Power Transfer systems it is essential that the operating frequency of the primary circuit be equal to the resonant frequency of the secondary circuit so there is the maximum energy transfer. The Magnetic Core Reactor allows controlling of the frequencies on both sides of the transmission and reception circuits. In addition, the assembly diagrams and test results are presented.

Preliminary Design of a Mid-Range Superconducting Wireless Power Transfer System for Magnetic Levitation Vehicles: Application to the MagLev-Cobra

“…The specifications of both coils are shown in Table I. The MCR, whose detailed operation can be found in [2], and is shown in Fig. 9, is used, as mentioned before, to correct variations in the resonance frequency that occur due to load changes.…”

“…An MCR is a device with the ability to correct matching deviations of the resonance frequency. It allows for adjusting frequency, in the emitter as well in the receiver circuits, which may occur, as mentioned, due to load variations [2]. These arise in the charging process of the, e.g., batteries, as later mentioned, connected to the WPT system.…”

Omnidirectional WPT and Data Communication for Electric Air Vehicles: Feasibility Study

“…Moreover, with the integration of WPT technology in the high power applications such as EV charging, UAV, drones, and AEA, the need of high transferred power increased. However, several studies focused on how to improve the system's performances [16][17][18][19]. Maximum transmission efficiency for WPT systems are reached under resonance condition, which is very sensitive to the load condition and the distances between the transceivers.…”

“…However, to compensate the misalignments and distance variation between the Tx and Rx coils, authors proposed an efficient method of frequency tuning in [16] allowing the switching of the operating frequency of the prototype to the desired resonant frequency based on the software application. While in [19,20], two magnetic core reactors (MCRs) are included at the transmitter and receiver sides to ensure the frequency control and to tune both ends at the same frequency, enabling the increase of the systems' performances by ensuring the impedance matching [16][17][18]. Furthermore, to advance the design of electric vehicles battery chargers using WPT technique, two different geometric configurations are compared in [21,22] in which the electrical three-phase system transmitter can be connected electrically and geometrically in a star or a delta configuration.…”