Analysis and Design of a T/S Compensated IPT System for AGV Maintaining Stable Output Current Versus Air Gap and Load Variations

Yang, Bin; Lu, Yuanfang; Peng, Yuner; He, Shuangjiang; Cui, Yang; He, Zhengyou; Wang, Zhulin

doi:10.1109/tpel.2021.3135053

Cited by 27 publications

(7 citation statements)

References 26 publications

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“…[hmin, hmax] is the predetermined range of air gap h, and the corresponding variation range of the LCT parameters are defined as [Lpmin(Lsmi n), Lpmax(Lsmax)] and [Mmin, Mmax], respectively. Then, Lp, Ls, and M can be expressed as (1) according to [9]. The angula r frequency of the system is ω=2πf, where f represents the switching frequency of the inverter.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…In some specific applications, such as automatic guided vehicle (AGV) [9], and so on, the displacement of the air gap is generated by some physical variations. We can take AGV as an example, usually, the AGV can have high-precision tracking capability [11].…”

mentioning

confidence: 99%

“…We can take AGV as an example, usually, the AGV can have high-precision tracking capability [11]. However, when loaded with d ifferent weights, the tire pressure and spring deformation will cause air gap variations for AGV [9]. Thus, the inductive power t ransfer (IPT) system has an inevitable air gap variation in these applications.…”

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confidence: 99%

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

Yang,

Zhang,

Zhu

et al. 2024

IEEE Trans. Power Electron.

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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 paper 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 work varies from 92.63% to 74.81%, as the air gap increases from 30mm to 90mm, 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%.

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Section: Theoretical Analysismentioning

confidence: 99%

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confidence: 99%

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

Yang,

Zhang,

Zhu

et al. 2024

IEEE Trans. Power Electron.

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“…Therefore, the design and implementation of high-performance WPT systems mainly consider variations in both MIs and loads [14,15]. Furthermore, to minimize the volt-ampere (VA) rating of the power supply and reduce the reactive power, the zero-phase angle (ZPA) input is desirable [16,17].…”

Section: Introductionmentioning

confidence: 99%

High-Order Compensation Topology Integration for High-Tolerant Wireless Power Transfer

et al. 2023

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Wireless power transfer (WPT) has been a promising way to transfer power wirelessly over certain distances through the mutual inductance (MI) of the magnetically coupled transmitter and receiver coils, providing significant benefits of convenience, safety, and feasibility to special occasions. The stable output and efficiency cannot be maintained due to the load variation and the inevitable misalignment between the magnetic couplers. High-order compensation topologies that are highly flexible in design due to more compensation elements are essential for the WPT to suppress the load variation and misalignment effects. However, due to core loss and thermal management, high-power-level and high-frequency inductor design have always been challenging for WPT systems. Space occupation and cost are other aspects to be considered for inductor design. Thus integrating these additional bulky inductors into the main coils has been a critical trial. As a result, the compensation topologies’ original input and output profiles will change or even disappear. This paper reviews the existing high-order compensation topologies and their integration principles and implementation for the WPT to obtain high misalignment tolerance. The design objectives and challenges of the integrated compensation topology in terms of misalignment tolerance capability are discussed. The relevant control systems to cope with coil misalignment and load variations are investigated. Challenges and future development of the high-tolerant WPT are discussed.

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“…The magnetic coupler composed of a transmitter (Tx) embedded under the ground, and a receiver (Rx) installed in the chassis of AGV, plays a crucial role in the wireless power transfer. Because of working indoors with relatively smooth road conditions, the chassis of AGV is usually several centimeters high [9]. However, the space of AGV's chassis is relatively narrow, which presents a challenge to magnetic coupler design [10], [11].…”

Section: Introductionmentioning

confidence: 99%

A Compact and Coupling-Smooth Magnetic Coupler Design for AGV Wireless Charging Application

Wang

Zhao

2023

IEEE Access

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A compact magnetic coupler of inductive power transferring (IPT) system for automated guided vehicles (AGVs) is proposed in this paper, which consists of a double-D (DD) transmitter (Tx) and a compact dual-coil receiver (Rx). By overlapping between one coupling peak point and another coupling null point of two Rx coils, the Rx of magnetic coupler achieves relatively small output voltage fluctuations, as well as minimizes its size. In addition, to eliminate cross-coupling of the dual-coil Rx, a mutual decoupling device composed of two lumped inductors is adopted, which possesses the same mutual inductance as the dual-coil Rx. Finally, based on the proposed magnetic coupler and its special way of decoupling, a 3kW IPT system is constructed with 180mm×390mm Tx, 150mm×210mm Rx, 40mm airgap magnetic coupler and inductor/capacitor/capacitor-series (LCC-S) based decoupling compensation network. The experimental results show that output voltage varies in proportion to the mutual inductance of Tx and Rx. The measured efficiency is 89.5% to 94.5% under the voltage range of 155V to 220V during the 90mm misalignment.INDEX TERMS Automated guided vehicle (AGV)，compact magnetic coupler, inductive power transfer (IPT), output voltage fluctuation, size minimization.

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Analysis and Design of a T/S Compensated IPT System for AGV Maintaining Stable Output Current Versus Air Gap and Load Variations

Cited by 27 publications

References 26 publications

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

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

High-Order Compensation Topology Integration for High-Tolerant Wireless Power Transfer

A Compact and Coupling-Smooth Magnetic Coupler Design for AGV Wireless Charging Application

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