Variable parameter and variable frequency‐based IPT charging system with configurable charge current and charge voltage

Abstract

Variable parameter (VP) or variable frequency (VF) methods for load-independent output current or output voltage in inductive power transfer (IPT) systems have been widely studied. This study proposes an IPT system based on series-series compensation topology with VP and VF methods to achieve constant-current-constant-voltage (CC-CV) charging for electric bicycles (EBs). The proposed IPT system can operate in CC and CV modes regardless of load conditions at two different operating frequencies with corresponding values of compensation capacitors. The rating current/voltage of the proposed method is configurable by altering the compensation capacitor and operational frequency. Therefore, one charging stand can be shared by various EBs to save the space and to cut the overall cost. Only one capacitor is needed for one EB specification. The proposed IPT system can achieve zero-voltage switching under all load conditions. An experimental prototype with two ratings of 48 V/3A and 60 V/4A is built to verify the feasibility of the proposed method. The experimental results demonstrate the feasibility of the proposed method.

Analysis of output characteristics of wireless power transfer system based on LCC/S-S hybrid compensation structure

“…Most of the electric bicycle batteries on the market are lithium batteries. Because the internal resistance of the battery changes during the charging process, the constant current-constant voltage breaking charging mode is usually used when charging the battery (Mai et al, 2018).…”

Collaborative Optimization Method of Power and Efficiency for LCC-S Wireless Power Transmission System

“…They are conveniently used for the pickups of both stretched and lumped track dynamic wireless charge systems and, in the latter case, they are also used in the track [15]. In reference [16], the constant current (CC) and constant voltage (CV) charging strategies based on phase shift control of a controllable rectifier circuit and efficiency optimization strategy based on dynamic equivalent impedance matching are proposed, which can improve the WPT system transmission efficiency while realizing CC and CV charging. References [17,18] improve the performance of the system by optimizing the structure of the system.…”

Análise e controle de um grupo de conversores CC-CC >i<interleaved>/i< bidirecionais em cascata para aplicações >i<grid-to-vehicle>/i< e >i<vehicle-to-grid>/i<

“…Neste contexto, conhecido como uma das principais estratégias de controle de carga, tanto para VEs quanto em outras aplicações, o modo de corrente constante (CC) e tensão constante (CV) são baseados nos parâmetros da bateria (níveis de corrente e tensão ou ainda, capacidade em Ah) Chen et al, 2019;Mai et al, 2020). 3 Esses modos são combinados para garantir um processo de carga seguro e eficiente, prologando sua vida útil e evitando danos causados por elevada corrente de carga e tensão que são responsáveis por altas temperaturas e formação de gases internos (Chen et al, 2018;.…”