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Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

邮发代号 80-972

2019 Impact Factor: 2.657

Frontiers in Energy  2020, Vol. 14 Issue (1): 152-165   https://doi.org/10.1007/s11708-019-0615-1
  本期目录
电动汽车无线充电系统谐振耦合线圈结构分析:仿真分析
LU M., JUNUSSOV A., BAGHERI M.()
纳扎尔巴耶夫大学,电气与计算机工程系,阿斯塔纳010000,哈萨克斯坦
Analysis of resonant coupling coil configurations of EV wireless charging system: a simulation study
M. LU, A. JUNUSSOV, M. BAGHERI()
Electrical and Computer Engineering Department, Nazarbayev University, Astana 010000, Kazakhstan
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摘要:

如今,内燃机汽车被认为是造成空气污染的主要因素之一。为了使交通更加环保,插入式电动车(PEVs)被提了出来。然而,随着PEVs数量的增长,成本、尺寸以及电池充电电缆等相关缺点已经出现。为了应对这些挑战,最近,新型无线充电系统已被推出。该技术发展迅速,并且对电动汽车充电操作变得非常有吸引力。目前,无线充电系统可以在几毫米到几百毫米范围内提供高效的电力传输。本文重点分析了用于电动汽车无线充电的电磁耦合谐振式无线技术。对电动汽车谐振式无线充电系统进行了建模、仿真,并通过改变不同的关键参数来评估传输距离、负载、线圈几何结构、线圈匝数、线圈形状和匝间距离对充电效率的影响。分析了仿真结果并讨论了重要尺寸。结果表明,合理选择线圈尺寸、匝间距离和线圈间传输距离可以显著提高充电效率。此外,传输距离、频率、负载以及线圈匝数对无线充电系统性能的影响也是本文关注的重点。

Abstract

Nowadays, internal combustion engine vehicles are considered as one of the major contributors to air pollution. To make transportation more environmentally friendly, plug-in electric vehicles (PEVs) have been proposed. However, with an increase in the number of PEVs, the drawbacks associated with the cost and size, as well as charging cables of batteries have arisen. To address these challenges, a novel technology named wireless charging system has been recently recommended. This technology rapidly evolves and becomes very attractive for charging operations of electric vehicles. Currently, wireless charging systems offer highly efficient power transfer over the distances ranging from several millimeters to several hundred millimeters. This paper is focused on analyzing electromagnetically coupled resonant wireless technique used for the charging of EVs. The resonant wireless charging system for EVs is modeled, simulated, and then examined by changing different key parameters to evaluate how transfer distance, load, and coil’s geometry, precisely number of coin’s turns, coin’s shape, and inter-turn distance, influence the efficiency of the charging process. The simulation results are analyzed and critical dimensions are discussed. It is revealed that a proper choice of the dimensions, inter-turn distance, and transfer distance between the coils can result in a significant improvement in charging efficiency. Furthermore, the influence of the transfer distance, frequency, load, as well as the number of the turns of the coil on the performance of wireless charging system is the main focus of this paper.

Key wordselectromagnetically coupled resonator    near-field power transfer    wireless power transfer (WPT)
收稿日期: 2018-03-08      出版日期: 2020-03-16
通讯作者: BAGHERI M.     E-mail: mehdi.bagheri@nu.edu.kz
Corresponding Author(s): M. BAGHERI   
 引用本文:   
LU M., JUNUSSOV A., BAGHERI M.. 电动汽车无线充电系统谐振耦合线圈结构分析:仿真分析[J]. Frontiers in Energy, 2020, 14(1): 152-165.
M. LU, A. JUNUSSOV, M. BAGHERI. Analysis of resonant coupling coil configurations of EV wireless charging system: a simulation study. Front. Energy, 2020, 14(1): 152-165.
 链接本文:  
https://academic.hep.com.cn/fie/CN/10.1007/s11708-019-0615-1
https://academic.hep.com.cn/fie/CN/Y2020/V14/I1/152
Fig.1  
Advantages Disadvantages
Cables, towers, substations are removed Cost of charging infrastructure is high
Energy can be transmitted to places, where wired transmission is impossible Radiation received is potentially dangerous for humans’ health
Peak efficiency is high Efficiency decays as the transfer distance increases
Tab.1  
Fig.2  
Fig.3  
Microwave power transfer Capacitive power transfer Resonant IPT
Distance Long Short Short
Frequency 1–30 MHz 1 kHz–20 MHz 20–200 kHz
Power level Low/Medium Low High
Cost Medium Low Medium
Efficiency Medium Low Medium
Tab.2  
Fig.4  
Fig.5  
Fig.6  
Fig.7  
0 cm 10 cm 20 cm 30 cm
L1/mH 112.34 118.69 119.33 119.45
L2/mH 112.27 118.76 119.21 119.33
M/mH 111.77 47.99 25.472 14.863
k 0.995 0.404 0.214 0.124
Tab.3  
5 7 9 11 13 15
L1/mH 22.11 41.62 67.44 99.88 139.4 186.5
L2/mH 31.09 41.63 67.43 99.91 139.4 186.6
M/mH 6.025 13.05 23.59 38.16 57.33 81.60
k 0.273 0.31 0.349 0.382 0.411 0.437
Tab.4  
3 mm 5 mm 7 mm 9 mm 10 mm
L1/mH 118.89 118.3 118.2 118.4 118.7
L2/mH 118.86 118.3 118.2 118.5 118.7
M/mH 37.618 40.46 43.18 45.84 47.14
k 0.316 0.342 0.365 0.386 0.396
Tab.5  
0 cm 10 cm 20 cm 30 cm
L1/mH 108.96 119.27 119.51 119.90
L2/mH 113.78 118.86 119.21 119.33
M/mH 98.325 45.955 25.372 15.16
k 0.883 0.386 0.212 0.127
Tab.6  
Fig.8  
Fig.9  
Fig.10  
Spacing/mm Transmitter radius/mm Receiver radius/mm Area/mm2 Coupling coefficient
7 385.8 385.8 308556.67 0.859
10 421.8 421.8 399894.08 0.8797
Percentage change/% 9.33 9.33 29.6 2.41
Tab.7  
Transmitting coil type Receiving coil type Par. 0 cm 10 cm 20 cm 30 cm
Circular coil Circular coil M/mH 111.7 47.99 25.472 16.863
k 0.995 0.404 0.214 0.128
Circular coil D-shaped coil M/mH 98.32 45.955 25.372 15.16
k 0.883 0.386 0.212 0.127
Tab.8  
Spacing/mm Inner radius/mm Outer radius/mm Area/mm2 Efficiency/%
7 225 385.8 308556.67 76.4
10 225 421.8 399894.08 77.5
Percentage of change/% 29.6 1.4
Tab.9  
Fig.11  
RL Distance/cm Turns Spacing between turns/mm
25 15 14 10
Tab.10  
I*1, I*2 Current in the transmitting and receiving coils, respectively
I1, I2 Root-mean square value of currents flowing through the coils
U12, U21 Voltage induced by the transmitting coil into the receiving one and vice versa
S12, S21 Apparent power values transferred from the transmitting circuit to the receiving one and vice versa
j12 Phase difference between I1and I2
M Mutual inductance between the coils
w Angular frequency
P12 Active power transfer between two coils (from 1 to 2)
S Total complex power
Q1, Q2 Quality factors of transmitting and receiving coils, respectively
L1, L2 Self-inductances of primary and secondary coils, respectively
R1, R2 Resistances of primary and secondary coils, respectively
k Coupling coefficient between L1and L2
VS Voltage source
RS Internal resistance of a voltage source
C1, C2 Resonant capacitors
RL Active load
η Power transfer efficiency
D Distance between two coils
r1, r2 Transmitting and receiving coils’ radii, respectively
S1, S2, S3, S4 Switches of the H-bridge inverter
R11, L11, C11 Compensation resistance, self-inductance and capacitance, respectively
A Surface area of the circular coil
Rout, Rin Outer and inner radii of the coils, respectively
  
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