A Compact and Low-Distortion Inductive Charging System for Automatic Guided Vehicles Based on LCC Compensation and Integrated Magnetic Coupler

Hua Zhang, Chong Zhu, Fei Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

This paper focuses on the study of the tightly-coupled inductive power transfer technology for the charging of automatic guided vehicles. It shows that there are a significant amount of high-order harmonic currents in the system due to the square-wave input voltage and the high coupling coefficient. The harmonics would induce extra power loss and reduce the system efficiency. This paper proposes to utilize the double-sided LCC compensation circuit to realize the wireless charging system, in which the inductors and capacitors work as the low-pass filters to reduce the harmonics. Besides, the compensation inductors are integrated into the main coil to save space, resulting in a compact coupler structure. The circuit working principle and the finite element (FEM) analysis of the magnetic coupler are provided in this paper to show the design process. In addition, a 1.8 kW prototype is implemented with a size of 220mm×220mm×10mm magnetic coupler. In a low-voltage and high-current application, the dc-dc efficiency reaches 86.1% in the 24V/74A output condition, and the total harmonic distortion is limited within 10% when the airgap is 15mm.

Original languageEnglish (US)
Title of host publicationITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538693100
DOIs
StatePublished - Jun 2019
Externally publishedYes
Event2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019 - Novi, United States
Duration: Jun 19 2019Jun 21 2019

Publication series

NameITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo

Conference

Conference2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019
Country/TerritoryUnited States
CityNovi
Period6/19/196/21/19

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Transportation
  • Automotive Engineering

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