CLL/S Detuned compensation network for electric vehicles wireless charging application

Abstract

<span lang="EN-GB">An electric vehicle (EV) can be charged wirelessly through an inductively coupled power transfer system where the system resonates the inductive coupling coil at the operating frequency by means of a compensation network. However, the resonant behaviour implies overcurrent in the inverter MOSFETs during uncoupled and high load resistor conditions, which affect to the inverter MOSFETs failure whenever the current exceeds their maximum current rating. Therefore, this paper presents a CLL/S detuned compensation network for EV wireless charging application to limit the inverter current during the uncoupled state and open circuit load conditions. The proposed compensation consists of a series capacitor and parallel inductor at the primary side and series capacitor at the secondary side. By using Kirchhoff Voltage Law (KVL) analysis, the primary side is detuned to inductive behaviour to ensure zero voltage switching (ZVS), and the secondary side remains at natural resonant tuning. From the simulation analysis, the slight increase of the parallel inductor value at the primary side can limit of the inverter current at uncoupled and high load resistor conditions. The proposed system also offers higher efficiency than the series-series detuned compensation and slightly lower than the double-sided LCC compensation network at different coupling factor.</span>

Effect of DC voltage source on the voltage and current of transmitter and receiver coil of 2.5 kHz wireless power transfer

“…The WPT system can be applied in the electrical area, especially in the biomedical device as explained by [19][20][21][22][23][24]. It can also be applied as battery charging [25] for DC source of electrical vehicle [26].This paper present the effect of DC voltage source on the voltage and current of 2.5 kHz WPT system. A propose 2.5 kHz WPT system is explained in a block diagram and implemented in hardware.…”

Centroidal-polygon: a new modified Euler to improve speed of resistor-inductor circuit equation

“…The RL series circuit is connected across a constant voltage source and a switch. Assume that the switch is open until it closed at a time, t=0, and then remains permanently closed, producing a "step response" type voltage input [28]. The current, I, begin to flow through the circuit but does not rise rapidly to its maximum value of Imax [29].…”

Wireless charging system for electric bicycle application

“…Also, the LCC compensation circuit has resonant frequency independent of the coupling coefficient, load, and the soft-switching condition for the electronic devices reached [10][11][12]. In [13], The CLL/S compensation circuit is used to limit the inverter current. However, the parameters of the compensation circuit are relatively large that is difficult to design high power systems.…”