Affiliations: [a] College of Automation, Chongqing University,
Chongqing, China | [b] State Key Laboratory of Power Transmission Equipment
and System Security and New Technology, Chongqing University, Chongqing,
China | [c] Chongqing Special Equipment Inspection and Research
Institute, Chongqing, China
Correspondence:
[*]
Corresponding author: Chao Hu, College of Automation, Chongqing
University, Chongqing 400044, China. Tel.: +86 15002310966; E-mail:
changong2013@gmail.com
Abstract: Magnetic coupler is the most critical part to achieve high power
transmitting capability in an inductive power transfer (IPT) system. This paper
introduces a design procedure of magnetic coupler. Based on the design
procedure, the main parameters that affect the output power and power loss of
the magnetic coupler have been found. In order to stable the operating
frequency, equations which calculate the receiver self-inductance and the
magnetic coupler mutual inductance are developed and analyzed. Moreover, the
parameters of Double-Layer-Double-D (DLDD) coil which is designed for electric
vehicles' (EVs') wireless charging are derived according to the magnetic
coupler design procedure. The experimental results show that the power transfer
efficiency (PTE) of an IPT system with DLDD coil can be as high as 85.1%
with a transmitting distance of 15 cm, while the output power is 10 kW.
Keywords: Inductive power transfer (IPT), electric vehicle (EV), magnetic coupler, design procedure
