Double‐LCL resonant compensation network for electric vehicles wireless power transfer: experimental study and analysis

Liu, Chuang; Ge, Shukun; Guo, Ying; Li, Hang; Cai, Guowei

doi:10.1049/iet-pel.2015.0186

Cited by 106 publications

(63 citation statements)

References 30 publications

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“…It has been clearly demonstrated in previous work [46], that SS and PS topologies are found to be the most efficient, resulting in 70.3% and 70.4% of efficiency, respectively. As the output efficiencies are relatively low, more advantageous compensation circuit topologies such as Inductor-Capacitor-Capacitor (LCC) and Inductor-Capacitor-Inductor (LCL) are introduced [47][48][49][50][51]. The utilization of these novel compensation circuits can enable Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) modes of operation, hereby increasing the power transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

et al. 2018

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Abstract:Wireless power transfer provides an opportunity to charge electric vehicles (EVs) without electrical cables. Two categories of this technique are distinguished: Stationary Wireless Charging (SWC) and Dynamic Wireless Charging (DWC) systems. Implementation of DWC is more desirable than SWC as it can potentially eliminate challenges associated with heavy weight batteries and time-consuming charging processes. However, power transfer efficiency and range, lateral misalignment of coils as well as implementation cost are issues affecting DWC. These issues need to be addressed through developing coil architectures and topologies as well as operating novel semiconductor switches at higher frequencies. This study presents a small-scale dynamic wireless power transfer system for EV. It specifically concentrates on analyzing the dynamic mutual inductance between the coils due to the misalignment as it has significant influence on the EV charging process, particularly, over the output power and overall efficiency. A simulation study is carried out to explore dynamic mutual inductance profile between the transmitter and receiver coils. Mutual inductance simulation results are then verified through practical measurements on fabricated coils. Integrating the practical results into the model, an EV DWC power transfer simulation is conducted and the relation between dynamic mutual inductance and output power are discussed technically.

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Section: Introductionmentioning

confidence: 99%

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

et al. 2018

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“…From papers, mutual inductance could be calculated. Then, the phase offset could be determined by Formula (10). In order to eliminate the phase offset ϕ and realize the output power regulation, the flow chart of phase-shift is in Figure 5.…”

Section: Control Methods Of Output Powermentioning

confidence: 99%

“…LCL (inductor capacitor inductor), CLC (capacitor inductor capacitor) and LCC (inductor capacitor capacitor) composite network are commonly used for the purpose. References [10,11] proposed a WPT system based on an LCL resonant network, which improves the capacity of the resonant tank and accomplishes constant current. References [12,13] used an LCC compensation network in dynamic wireless charging for system optimization.…”

Section: Introductionmentioning

confidence: 99%

A Phase-Shifted Control for Wireless Power Transfer System by Using Dual Excitation Units

Dai

Jiang

et al. 2017

Energies

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Wireless power transfer (WPT) technology can provide intelligent robots with a flexible, robust, and safe power supply, especially in very harsh environments including high humidity and high temperature. To meet increasing power requirement for robotic applications, this paper proposes a novel method to increase system power transfer capability without increasing voltage and current stress, realized by using dual excitation units at the primary side. On this basis, this paper proposes a phase-shifted control method for output power regulation which can keep efficiency high. At the same time, the system is proved to have a better output robust characteristic by analysis under the condition of parameter variation. Finally, experimental results show the proposed dual excitation units (DEU)-WPT system can increase output power by at least three times compared to classical WPT system, and the efficiency is improved by 9%. Figure 1. Dual excitation unit wireless power transfer (DEU-WPT) system.The equivalent circuit of the circuit model is shown in Figure 2, where L p1 , L p2 are primary coil and L s are secondary coil inductance, respectively. C p1 , C p2 , and C s are the resonant capacitance. i p1 , i p2 are resonant currents in the coil. u p1 and u p2 are resonant voltage at the primary side. Z 1 and Z 2 are the reflection impedance. C o is the capacitance of rectifier circuit, and R L is the equivalent load resistance.

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“…Nowadays, the importance of renewable energy sources such as solar, wind, and fuel cells has been increasing with the decrease in traditional energy resources [1]. Solar energy from these energy sources is preferred in grid-connected systems due to its decreasing costs over time.…”

Section: Introductionmentioning

confidence: 99%

Design and control of an LCL-type single-phase grid-connected inverter withinverter current feedback using the phase-delay method

Evran¹

2019

Turk J Elec Eng & Comp Sci

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In this study, a novel single-phase grid-connected microinverter system and its control applications are introduced for solar energy systems. The proposed system consists of two stages to transfer solar power to the grid. In the first stage, an isolated high-gain DC/DC converter is used to increase low solar panel output voltage. In the second stage, an inverter is used to supply a sinusoidal current to the grid. Moreover, a proportional resonant controller is adopted to reduce grid current total harmonic distortions (THDs) and an LCL filter is used to provide better harmonic attenuation. However, the ratio between the sampling frequency fs and the resonance frequency fres should be greater than 6 in the LCL filter with the inverter current feedback for a stable system. In order to obtain higher phase margins, the sampling frequency should be increased, which increases the inverter switching frequency. The present study shows that fs/fres can be lower than 6 by placing a phase delay on the inverter current feedback path to guarantee adequate stability margins. The effectiveness and feasibility of the proposed method are confirmed by the experimental test results based on a 300-W laboratory prototype.

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Double‐LCL resonant compensation network for electric vehicles wireless power transfer: experimental study and analysis

Cited by 106 publications

References 30 publications

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

A Phase-Shifted Control for Wireless Power Transfer System by Using Dual Excitation Units

Design and control of an LCL-type single-phase grid-connected inverter withinverter current feedback using the phase-delay method

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