Dynamic Wireless Charging for Roadway-Powered Electric Vehicles: A Comprehensive Analysis and Design

Abstract

Abstract-This paper presents a comprehensive analysis of the roadway powering system for electric vehicles (EVs) and proposes a design from the perspective of power track design, integration, and powering control strategy, aiming to ensure the charging power and persistence, enhance the control flexibility, and reduce the construction cost. 1) A novel design scheme is first proposed to determine the length and number of turns for power tracks by investigating the power supply-and-demand and the loss. 2) A novel evaluation index, namely the magnetic distribution variance, is proposed to determine the gap between adjacent tracks, which can effectively produce evenly-distributed energy field, thus improving the dynamic charging performance for EVs. 3) A sectional powering control strategy is proposed to implement a cost-saving and flexible roadway powering system. Lastly, the simulated and experimental results show that the exemplified prototype can achieve the transmission power 50 W over the distance of 200 mm, which verifies the proposed EV dynamic charging system with the salient advantages of the constant energization, flexible power control, and cost saving.

Review of Contactless Energy Transfer Concept Applied to Inductive Power Transfer Systems in Electric Vehicles

“…IPT systems could be operated in static, car parks mode [51][52][53][54][55][56][57] or when running [49,[58][59][60][61][62][63]. The dynamic mode, yet more complex in its functioning control and the necessity for particular infrastructures, presents the opportunity of beating the obstacles correspond to the weighty battery storage aboard, the lengthy charging period and the restricted autonomy in the static mode.…”

“…Expressions characterizing the behavior and permitting the design and optimization of IPT systems as well as equivalent circuits involving the ICT features and the resonance topology for a specific compensation could be found in many references for both of IPT systems, the static one, e.g., [51][52][53][54][55][56][57] and the dynamic one, e.g., [49,[58][59][60][61][62][63].…”

Parameter Trade-Off Between Electric Load, Quality Factor and Coupling Coefficient for Performance Enrichment of Wireless Power Transfer System

“…Despite the fact that inductive coupling based WPT system has been used for different applications, unfortunately, it could not mitigate the consumer needs due to its inefficiency and power delivery capability over a long range. Nevertheless, over the years the magnetic resonance coupling based WPT (MRC-WPT) systems have been proven providentially as a competent alternative [6][7][8]. It is well known that the performance of MRC-WPT system depends on different operating functional parameters like coil dimension, coil properties, quality factor of coils, physical spacing of coils, alignment of the coils, mutual coupling, frequency, electric load, etc.…”

Wireless Communication and Management System for E-Bike Dynamic Inductive Power Transfer Lanes

“…One of the crucial design aspects of DIWPT lanes [2][3][4][5] is the synchronization of power switching of the primary coils, along the vehicle's path, with the presence of the vehicle itself. In the current best DIWPT research efforts, such as the FABRIC European project [6], this synchronization and the lane management itself are achieved at an implementation complexity that is not likely to be currently affordable for lightweight EV applications, such as e-bikes.…”