Analysis, Design, and Implementation of WPT System for EV's Battery Charging Based on Optimal Operation Frequency Range

Jiang, Yongbin; Wang, Laili; Wang, Yue; Liu, Junwen; Wu, Min; Ning, Gaidi

doi:10.1109/tpel.2018.2873222

Cited by 128 publications

(27 citation statements)

References 46 publications

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“…However, in the aforementioned WPTSs, the zero-voltage switching (ZVS) of the inverter and the AR cannot be guaranteed. It is worth noting that ZVS is vital for system efficiency improvement and electromagnetic interference (EMI) reduction as it can significantly reduce switching losses, particularly for high-power applications [20]- [24].…”

Section: A Joint Control With Variable Zvs Angles For Dynamic Efficiency Optimization In Wirelessmentioning

confidence: 99%

A Joint Control With Variable ZVS Angles for Dynamic Efficiency Optimization in Wireless Power Transfer System

Jiang

Wang

Fang

et al. 2020

IEEE Trans. Power Electron.

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Tight voltage regulation and high efficiency are fundamental objectives of wireless power transfer systems (WPTSs) as power supplies. Although the well-established impedance matching control attempts to achieve high efficiency, the associated extra dcdc converters or hard switching of converters in WPTSs reduce the overall system efficiency, particularly for high-power applications. In this article, under zero voltage switching (ZVS) conditions, the minimum power loss point is derived and proved in detail with different ZVS angles. Moreover, a joint control with variable ZVS angles (JC-VZA) is proposed to ensure ZVS of all switches and achieve the required output, simultaneously. This control scheme is implemented by use of controllers in both sides of WPTSs, which adjust their respective ZVS angles for dynamic efficiency optimization. Under ZVS conditions, the proposed JC-VZA features an optimal amount of reactive power that achieves the minimum total power loss by significantly reducing the switching loss. As a result, the experimental results obtained from our WPTS prototype verify its superiority. With a coupling coefficient k of 0.2 or 0.15, the maximum efficiency reaches 96.8% or 95.0% under the power rating of 288 W (rated load) as well as 92.4% or 88.7% in the case of light load (9% of 288 W). Index Terms-Dynamic efficiency optimization, joint control with variable ZVS angles (JC-VZA), wireless power transfer system (WPTS), zero voltage switching (ZVS).

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Section: A Joint Control With Variable Zvs Angles For Dynamic Efficiency Optimization In Wirelessmentioning

confidence: 99%

A Joint Control With Variable ZVS Angles for Dynamic Efficiency Optimization in Wireless Power Transfer System

Jiang

Wang

Fang

et al. 2020

IEEE Trans. Power Electron.

Self Cite

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“…F D1 is changed from 0 to 1. If D i = 0 (i = 2,3,..., 9), one load moved from the area [D i − 1 , D i ) to the area [D i , D i + 1 ). F Di is changed from 0 to 1 and F Di-1 is changed from 1 to 0.…”

Section: The Power Stabilization Control Strategy Of the Static-dynammentioning

confidence: 99%

“…In the field of static wireless charging technology, the research points mainly includes the design of the high-frequent inverter [3,4], the design of the wireless energy transceivers [5], the design of the compensation circuits [6,7], the optimization of the receiving power and efficiency [8,9], the foreign object detection [10,11] and the issue of the electromagnetic field [12]. The multi-phase resonant inverter is proposed to realize the high output power for wireless charging system of EVs in Reference [3] and [4].…”

Section: Introductionmentioning

confidence: 99%

Power Stabilization based on Switching Control of Segmented Transmitting Coils for Multi Loads in Static-Dynamic Hybrid Wireless Charging System at Traffic Lights

et al. 2019

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In order to promote the driving range of the electric vehicles (EVs), decrease the demand for large capacity battery and create more charging opportunities for the EVs, the static-dynamic hybrid wireless charging system is presented to utilize waiting time of traffic lights at intersections to replenish electricity in this paper. Firstly, the topology and principle of the proposed static-dynamic hybrid wireless charging system with short-segmented coils at traffic lights are introduced. Secondly, the general circuit model of the static-dynamic hybrid wireless charging system with multi-coupling between the primary and secondary sides is developed. The design method of the compensation circuit in primary side based on the number and the positions of the energized primary coils is investigated. After analyzing the characteristics of the system varying with the position of the single load, the control conceptions of the energizing mode alternating in primary side and the combination of the primary compensation capacitors are put forward. Then the power stabilization control strategy of the static-dynamic hybrid wireless charging system with multi short-segmented coils and multi loads is proposed. Finally, the theoretical analyses are verified with the experiments.

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“…Series-Series compensation is the most widely used topology in IPT system, which has load-independent current output characteristic and high reliability with coil misalignment [11,12,13,14]. A typical WPT system with S-S compensation, consisting of the DC source, the inverter, the primary compensation capacitor, the Tx and Rx coils, the secondary compensation capacitor, the rectifier and the load, is illustrated in Fig.…”

Section: Fig 1 Fundamental Operation With Two-coil Wpt Systemmentioning

confidence: 99%

Investigation and Design of Wireless Power Transfer System for Autonomous Underwater Vehicle

Dou

Zhao

Ouyang

et al. 2019

2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

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With the development of wireless power transfer (WPT) technology, it is possible to transfer power to the batteries without plug-in cables and human interaction for autonomous underwater vehicles (AUVs), taking advantage of high safety, high reliability and unattended capability. However, when implementing the WPT system under the seawater environment, the electrical properties of seawater including the permittivity and the conductivity cause a significant changing in the parasitics of winding coils underwater. The seawater, which owns higher permittivity and conductivity compared to the air, not only causes extra parasitic capacitance to coils but also conducts extra eddy current loss, and thus reduces the system efficiency. In this paper, the characteristics of winding coils underwater are investigated and an optimized design methodology for underwater WPT system with series-series (SS) compensation is proposed. A 200-W underwater WPT prototype is built and experimentally verifies the analysis for the coils and the optimized design approach. The experimental demonstration also shows the system efficiency comparison between the air, the water, and the seawater environments.

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Analysis, Design, and Implementation of WPT System for EV's Battery Charging Based on Optimal Operation Frequency Range

Cited by 128 publications

References 46 publications

A Joint Control With Variable ZVS Angles for Dynamic Efficiency Optimization in Wireless Power Transfer System

A Joint Control With Variable ZVS Angles for Dynamic Efficiency Optimization in Wireless Power Transfer System

Power Stabilization based on Switching Control of Segmented Transmitting Coils for Multi Loads in Static-Dynamic Hybrid Wireless Charging System at Traffic Lights

Investigation and Design of Wireless Power Transfer System for Autonomous Underwater Vehicle

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