Effect of wireless power link load resistance on the efficiency of the energy transfer

Bojarski, Mariusz; Asa, Erdem; Czarkowski, Dariusz

doi:10.1109/ievc.2014.7056194

Cited by 13 publications

(8 citation statements)

References 23 publications

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“…Although the reactive part of the primary series reactance has no direct effect on the efficiency, its proper tuning affects the power transfer capability of the system according to Eqs. 3and (4).…”

Section: System Overviewmentioning

confidence: 99%

“…The steady-state circuit model of the system [3,4,[14][15][16][17] is shown in Figure 2. In this model, a fundamental harmonic analysis method is used; therefore, the primary-side inverter is characterized by an ideal sinusoidal voltage source at the fundamental frequency.…”

Section: System Overviewmentioning

confidence: 99%

“…The efficiency of an IPT system is dependent on loading conditions on its secondary side [4,5]. In a battery charging system, the loading condition varies with time from battery floating to the full output power.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of losses in a secondary-side controlled wireless battery chargingsystem

Gurbuz¹,

Surgevil²,

Boztepe³

2019

Turk J Elec Eng & Comp Sci

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Secondary-side controlled inductive power transfer (IPT) systems are easy to control compared to primary and dual-side control methods, and more importantly, they do not require wireless communication between primary and secondary sides. In this paper, a wireless battery charging system based on secondary-side controlled IPT is analyzed and presented in detail. The proposed control method relies on the detection of the secondary coil current and the transferred power can be fully controlled by the secondary-side active rectifier with reduced number of power switching devices. The steady-state performance of the IPT system is evaluated using a fundamental harmonic analysis method for resistive and reactive control modes of the active rectifier by taking the converter losses into account. Theoretical and simulation results of the designed system are validated by experimental results obtained from the implemented laboratory prototype for charging of a 96-V lead-acid battery.

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Section: System Overviewmentioning

confidence: 99%

Section: System Overviewmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of losses in a secondary-side controlled wireless battery chargingsystem

Gurbuz¹,

Surgevil²,

Boztepe³

2019

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

show abstract

“…Each intercell transformer has two windings, which are connected as shown in the figure. The wireless power link consist of two identical coils L and two series resonant capacitors C. These coils are coupled with each other with the coupling factor K. The efficiency of the wireless power link depends on its load resistance [16]. Thus, the impedance matching autotransformer is used on the secondary side.…”

Section: Circuit Descriptionmentioning

confidence: 99%

Three-phase resonant inverter for wireless power transfer

Bojarski

Asa

Czarkowski

2015

2015 IEEE Wireless Power Transfer Conference (WPTC)

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A three-phase resonant inverter for wireless power transfer applications is presented in this paper. A phasefrequency hybrid control strategy is proposed as an alternative to the traditional frequency and phase control methods. An experimental prototype of the three-phase resonant inverter was built and connected with wireless power link and rectifier. The hybrid phase-frequency control strategy was implemented and compared with frequency control at the output power up to 10 kW. The experimental results show that the proposed inverter can operate within the desired frequency range with high efficiency while regulating output from zero to maximum.

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“…Optimal resonant load transformation is analyzed for the biomedical implants [2 1] and high power applications [22] [23].…”

Section: Introductionmentioning

confidence: 99%

A novel common mode multi-phase half-wave semi-synchronous rectifier for inductive power transfer applications

Colak

Asa

Bojarski

et al. 2015

2015 IEEE Transportation Electrification Conference and Expo (ITEC)

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In this study, a novel common mode multi phase half-wave semi-synchronous rectifier is investigated for applications in wireless energy transfer. The circuit is intended to alleviate variations of the load resistance or coupling coefficient factor while maintaining high efficiency. The proposed rectifier structure is based on the connection of semi-controlled multiple half-wave rectifier topology through multiple inductors. The receiver side semi-synchronous switches are controlled to increase the system efficiency by a symmetrical phase-shifted PWM signals in response to load variations. A 700 W laboratory prototype system is designed to validate the proposed topology in terms of current, power, and efficiency.Experimental results are provided for various loads using 8 inches air gap coreless transformer, which has dimension 2.5 by 2.5 feet, with a 120 V input and a maximum efficiency of 94.8 %.

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Effect of wireless power link load resistance on the efficiency of the energy transfer

Cited by 13 publications

References 23 publications

Evaluation of losses in a secondary-side controlled wireless battery chargingsystem

Evaluation of losses in a secondary-side controlled wireless battery chargingsystem

Three-phase resonant inverter for wireless power transfer

A novel common mode multi-phase half-wave semi-synchronous rectifier for inductive power transfer applications

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