TY - GEN
T1 - A Compact and Low-Distortion Inductive Charging System for Automatic Guided Vehicles Based on LCC Compensation and Integrated Magnetic Coupler
AU - Zhang, Hua
AU - Zhu, Chong
AU - Lu, Fei
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/6
Y1 - 2019/6
N2 - 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.
AB - 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.
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U2 - 10.1109/ITEC.2019.8790487
DO - 10.1109/ITEC.2019.8790487
M3 - Conference contribution
AN - SCOPUS:85071300777
T3 - ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo
BT - ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019
Y2 - 19 June 2019 through 21 June 2019
ER -