A Design Method to Minimize Detuning for Double-Sided LCC-Compensated IPT System Improving Efficiency Versus Air Gap Variation

TY - JOUR

T1 - A Design Method to Minimize Detuning for Double-Sided LCC-Compensated IPT System Improving Efficiency Versus Air Gap Variation

AU - Yang, Bin

AU - Zhang, Yiming

AU - Zhu, Chenyan

AU - Sahoo, Subham

AU - Chen, Yang

AU - Mai, Ruikun

AU - He, Zhengyou

AU - Blaabjerg, Frede

PY - 2024/1/1

Y1 - 2024/1/1

N2 - Inductive power transfer (IPT) technology has garnered considerable attention due to its widespread range of applications. The variation in the air gap can result in variations in the loosely coupled transformer (LCT) parameters, including self-inductance and mutual inductance, due to positional deviations with the ferrite cores on both sides. These variable LCT parameters can damage the resonant tank, ultimately resulting in reduced efficiency. To address this problem, a double-sided LCC -compensated IPT system with a compact decoupled coil is proposed in this article to improve the system's efficiency with respect to the air gap variation. The key idea is to neutralize the variation in LCT parameters through the use of the self-inductance variation of the decoupled coil so that the detuning degree of the system can be suppressed. Subsequently, the analysis and parametric design process of the system are elaborated. Finally, a 1-kW experimental setup is built to verify the feasibility of the proposed method. Experimental results show that the efficiency of the system proposed in this article varies from 92.63% to 74.81%, as the air gap increases from 30 to 90 mm, wherein the primary and secondary self-inductance and mutual inductance increased by 19.3% and 135.3%, respectively. Compared with the traditional method, the maximum efficiency improvement is up to 8.16%.

AB - Inductive power transfer (IPT) technology has garnered considerable attention due to its widespread range of applications. The variation in the air gap can result in variations in the loosely coupled transformer (LCT) parameters, including self-inductance and mutual inductance, due to positional deviations with the ferrite cores on both sides. These variable LCT parameters can damage the resonant tank, ultimately resulting in reduced efficiency. To address this problem, a double-sided LCC -compensated IPT system with a compact decoupled coil is proposed in this article to improve the system's efficiency with respect to the air gap variation. The key idea is to neutralize the variation in LCT parameters through the use of the self-inductance variation of the decoupled coil so that the detuning degree of the system can be suppressed. Subsequently, the analysis and parametric design process of the system are elaborated. Finally, a 1-kW experimental setup is built to verify the feasibility of the proposed method. Experimental results show that the efficiency of the system proposed in this article varies from 92.63% to 74.81%, as the air gap increases from 30 to 90 mm, wherein the primary and secondary self-inductance and mutual inductance increased by 19.3% and 135.3%, respectively. Compared with the traditional method, the maximum efficiency improvement is up to 8.16%.

KW - Air gap

KW - Capacitors

KW - Efficiency

KW - Impedance

KW - Inductance

KW - Inductive Power Transfer (IPT)

KW - Inductors

KW - loosely coupled transformer (LCT) parameters

KW - Topology

KW - Tuning

KW - efficiency improvement

UR - http://www.scopus.com/inward/record.url?scp=85173118228&partnerID=8YFLogxK

U2 - 10.1109/TPEL.2023.3318652

DO - 10.1109/TPEL.2023.3318652

M3 - Journal article

SN - 0885-8993

VL - 39

SP - 1723

EP - 1737

JO - I E E E Transactions on Power Electronics

JF - I E E E Transactions on Power Electronics

IS - 1

M1 - 10262168

ER -