NDLI: Design and implementation of weaving-type pad for contactless EV inductive charging system

Content Provider	IET Digital Library
Author	Lee, Jia You Shen, Hung Yu Lee, Kun Wei
Abstract	The purpose of this study is to develop a new weaving-type pad for electric vehicles (EV) contactless inductive charging system. This proposed charging pad which consists of a weaving-type coil is fabricated to obtain a uniform mutual inductance profile over the charging surface and to solve the problem of present inductive coupled structure in which the EV has to be placed exactly on a specific place. Apart from weaving-type pad, type E core and two overlapping coils are utilised as a secondary pickup to guide and to pick more magnetic flux. The analysis and simulation of magnetic characteristic for comparing the proposed weaving-type pad to simple shape pad are performed by finite-element-analysis (FEA) software. Phase locked loop circuit is utilised to match the operating frequency and resonant frequency in order to solve the loading effect problem caused by impedance variation during the battery charging procedure. To validate the concept and system design, a laboratory scale test system with weaving-type pad for EV contactless inductive charging is built and tested. The coupling efficiency is found to be 66% for an air gap of 9 cm between the weaving-type charging pad and pickup when a 2 Ah lithium iron phosphate battery is charged.
Starting Page	2533
Ending Page	2542
Page Count	10
ISSN	17554535
Volume Number	7
e-ISSN	17554543
Issue Number	Issue 10, Oct (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/7/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0900
Journal	IET Power Electronics
Publisher Date	2014-06-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Air Gap Battery Chargers Battery Charging Procedure Battery Powered Vehicle Contactless EV Inductive Charging System Coupling Efficiency Demodulator Discriminators And Mixers Electric Vehicle FEA Software Finite Element Analysis Impedance Variation Inductive Coupled Structure Laboratory Scale Test System Lithium Iron Phosphate Battery Loading Effect Problem Magnetic Characteristic Magnetic Core Magnetic Flux Modulator Phase Locked Loop Phase Locked Loop Circuit Power Electronics Power Supply Supervisory Circuit Transportation Type E Core Uniform Mutual Inductance Profile Weaving-type Charging Pad Weaving-type Coil
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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