Topology and control strategy on transformerless wireless power station for future electric transportation systems

Lin, Yunzhi; Zhao, Zhengming

doi:10.1002/2050-7038.13019

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Many resonant inverters using resonance network with H-bridge inverter are discussed in [17]. Moreover, resonant inverters with minimum switches such as class D and class E inverters are reported in the literature [18][19][20], which are mostly preferred due to their soft switching property.…”

Section: Introductionmentioning

confidence: 99%

Single-Phase Wireless Electric Vehicle Charger Using EF2 Inverter

Meher

Singh

2023

International Transactions on Electrical Energy Systems

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This paper proposes a wireless battery charger topology for electric vehicle (EV) application that can be installed in public charging infrastructure as well as in home premises. The proposed topology can maintain constant current as well as constant voltage at the battery terminal and simultaneously can maintain near unity power factor at the input side using power factor correction (PFC) operation and thus satisfy all the criteria of a standard EV charger. The heart of the wireless power transfer (WPT) scheme is a high-frequency (HF) inverter. In this work, a class EF2 inverter is used to generate HF AC in such a way that it can deliver power with variable loading condition while maintaining constant current (CC) or constant voltage (CV) according to the requirement of CC-CV charging profile. To supply power to this EF2 inverter, an AC-DC front-end converter (stage-1) is integrated with the charger. The stage-1 is operated as a constant voltage source to the EF2 inverter for CC mode and constant current source for CV mode operation. CC-CV at the battery end and PFC at the input end are achieved only by controlling the gate pulse of stage-1. The WPT coils are first simulated using Ansys Maxwell package, and the complete charger is simulated with PSIM simulation software. A scaled-down 200 W laboratory prototype of the proposed charger is developed and tested with a resistive load to validate the idea. The wireless power transfer is achieved for a maximum distance of 12 cm between the transmitting and receiving coil. Finally, the charger is tested to charge both 12 V and 24 V battery packs and the CC-CV charging profile is presented for the 24 V, 30 Ah battery pack.

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Section: Introductionmentioning

confidence: 99%

Single-Phase Wireless Electric Vehicle Charger Using EF2 Inverter

Meher

Singh

2023

International Transactions on Electrical Energy Systems

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“…In this paper, focus is given to the performance research of a certain WPT system with a series-series compensation network [40][41][42][43][44][45] using an alternative secondary-side rectifier topology. The analysis of the impedance ratio is being evaluated in reference to the efficiency of the whole system.…”

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confidence: 99%

Wireless Power Transfer System with Current-Doubler Rectifier on the Secondary Side—Analysis, Modeling, and Verification

Kindl,

Zavrel,

Tyrpekl

et al. 2023

Electronics

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In this paper, the proposal for the performance optimization of the wireless power transfer (WPT) system is given. The solution is based on the alternative configuration of the secondary-side rectifier. It is represented by a diode rectifier with a current doubler. Compared to the bridge rectifier, two diodes are replaced by the inductors. Initially, a system analysis was performed to investigate the electrical behavior and find the most optimal conditions referred to as terms of efficiency performance at nominal power. Due to this requirement, the rectifier inductors must be designed accordingly to meet this condition. The experimental verification was realized as well, while the proposed solution was compared to other common alternatives of the secondary-side rectification. The load sensitivity analysis in terms of efficiency performance was realized as well to observe the system behavior for a wide operation range. From the results, it is seen that the proposed alternative of the secondary-side rectification of the WPT system gives promising results in terms of high operating efficiency.

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