Experimental data validating the optimization of a wireless power transfer prototype employing a novel phase shift measurement system and frequency control

Martínez, Andrés; González, Christian; Jaramillo, Adrián; Cárdenas, Dorindo; Chong, Alejandro Von

doi:10.1016/j.dib.2022.108675

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…The dead-time refers to the intentional delay between turning off one IGBT in a phase leg and turning on its complementary IGBT. However, such a blanking period can affect the reliability, power quality, and losses of the system [11][12][13][14][15][16][17][18]. Furthermore, if issues associated with dead-time are not addressed appropriately, it may result in voltage distortions [11].…”

Section: Introductionmentioning

confidence: 99%

Dead-Time Effect in Inverters on Wireless Power Transfer

Rajs,

Herceg,

Despotović

et al. 2024

Electronics

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This paper presents a comprehensive analysis of the dead-time effects in wireless power transfer systems based on LCC-S topology. In these systems operating at high frequencies, the ratio of dead-time versus the operating period becomes critical, and the dead-time issue can cause certain problems regarding power quality, efficiency, and output voltage ripple. The impact of input quantities such as voltage and switching frequency on the efficiency and output power of the LCC-S-tuned WPT system was also investigated. The optimal combination of these parameters used to achieve the maximum efficiency for a target output power and to set the appropriate value of the dead time were determined by running multiple simulations using the MATLAB R2023b software platform. It was also shown that the output voltage remained unchanged with and without a load and up to 1200 ns of dead-time, which provides a simple implementation of the corresponding mathematical model. In the recommended interval of 600–1500 ns, the influence of the dead-time on the value of the output voltage amplitude is less than 10%. The validity of the proposed method was confirmed through the implementation of the experimental prototype, a 5 kW wireless power transmission system, and the obtained results were in accordance with the simulation results.

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Section: Introductionmentioning

confidence: 99%

Dead-Time Effect in Inverters on Wireless Power Transfer

Rajs,

Herceg,

Despotović

et al. 2024

Electronics

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“…To improve the output performance to reduce the energy consumption of the WPT system under misalignment conditions, many methods have been proposed, which can be roughly classified into three categories: (1) variable frequency control [12][13][14][15], (2) optimization on coupling coils [16][17][18][19][20][21][22][23], and (3) regulation on compensation parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In [12][13][14][15], the switching frequency of the converter is adjusted to track the optimal system operating point to improve energy transfer efficiency. However, the variable frequency control puts forward relatively high requirements for the hardware condition and corresponding software design of the digital controller.…”

Section: Introductionmentioning

confidence: 99%

Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Diao

Mei

et al. 2023

Electronics

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This paper proposes an active resonant network based on variable resonant capacitances to improve the operating performance of the LCC-S compensated topology in the wireless power transfer (WPT) system for electric vehicles under coil-misaligned conditions. By adjusting the series and parallel compensation capacitances on the transmitting side, the output voltage can be kept constant and the energy transfer efficiency can be improved under different coil offsets. The switch-controlled capacitors (SCCs) are used to change the compensation capacitances continuously. To find the proper compensation capacitances to achieve the excellent performance of the system, the optimization algorithm is applied, and the corresponding digital control strategy is described to regulate the equivalent capacitances of SCCs. Experimental results with a 2.7 kW power scale show that the output voltage is constant, and the operating efficiency is always over 90% in the WPT system with an active resonant network under different misalignment conditions. In addition, the system is delivering an equal amount of energy for all misalignments within the range of 80 mm, which improves the expected value of transferred energy by about 29%.

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