Resonant Analysis of Magnetic Coupling Wireless Power Transfer Systems

Liao, Zhijuan; Sun, Yue; Ye, Zhao-Hong; Tang, Chunsen; Wang, Peiyue

doi:10.1109/tpel.2018.2868727

Cited by 50 publications

(19 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gain of the data transmission could be deduced based on the impedance of each circuit when the parameters are met with the (11), (17), and (26). The gain noted as G d is derived as followed:…”

Section: Tx Circuit and Input Tankmentioning

confidence: 99%

An Optimization Method for Simultaneous Wireless Power and Data Transfer Systems

et al. 2020

Self Cite

View full text Add to dashboard Cite

Simultaneous wireless power and data transfer (SWPDT) technology is usually needed in wireless power transfer (WPT) systems. In this paper, to achieve the efficient and stable SWPDT, the signal to noise rate (SNR) is first optimized through the analysis of data transmission gain and the interference of power transfer on data transfer. In order to reduce the interference of power channel to data transfer channel, the compensation topology of double-sided LCC and the band-stop networks are used. To solve the problem of SNR limitation, the coupling relationships between each circuit are taken into consideration and a matching method of resonance parameters to improve the SNR is presented. Based on the relationship between SNR and the parameters of data transfer channel, an optimization design method focused on parameters of data transfer channel for improving the SNR is presented. Finally, the feasibility and the correctness of the parameter design method proposed in this paper is verified by simulation and experiment.

show abstract

Section: Tx Circuit and Input Tankmentioning

confidence: 99%

An Optimization Method for Simultaneous Wireless Power and Data Transfer Systems

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, this zero-voltage switching fails if the reflected resistance (R refl ) is too high [11]. High reflected resistance happens when the coupling between Tx and Rx is high at close distance as in Equation (1). This reduces I TX as in Figure 2b.…”

Section: Inverter Degradations At Strong Couplingmentioning

confidence: 99%

“…One of the major goals in wireless power transfer research today is to accommodate wide distance variations with high efficiency. It has been noted that the distance variation may cause frequency splitting if the transmitter (Tx) and receiver (Rx) coils are brought close together [1][2][3]. Either delivered voltage or power efficiency experiences a decrease when the system operates at the resonant frequency of Tx coil and Rx coil.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer under Wide Distance Variation Using Dual Impedance Frequency

Lee

Ahn

2020

Electronics

View full text Add to dashboard Cite

A dual-impedance operation, where coil impedance is controlled by operating frequency selection, is proposed to maintain optimum reflected impedance across coupling variation. More specifically, this work focuses on how high coupling between coils presents excessively high reflected resistance to transmitter (Tx) inverters, degrading the efficiency and output power of the inverter. To overcome this problem, the proposed system is equipped with dual-impedance coil and selects high- or low-impedance coil based on the ability to operate both at 200 kHz and 6.78 MHz frequencies. The reactive impedances of 6.78 MHz coils are designed to be higher than that of 200 kHz coils. Since the reflected resistance is proportional to the coil impedances and coupling squared, at close distance with high coupling coefficient, 200 kHz coils with low coil impedances are activated to prevent an excessive rise in reflected resistance. On the other hand, at large distance spacing with low coupling coefficient, 6.78 MHz coils with high coil impedances are activated so that sufficient reflected resistance is obtained even under the small coupling. The proposed system’s advantages are the high efficiency and the elimination of bulky mechanical relay switches. Measured efficiencies are 88.6–50% across 10 coupling variations.

show abstract

“…Several authors have proposed solutions based on the use of intermediate coils, also known as resonators or relay coils. Formerly these solutions were developed for wireless power transfer (WPT) applications [20], [21], [22], [23], [24] and subsequently they have been applied to domestic induction systems [25], [26], [5], [27], which is referred as inductively coupled heating (ICH) in this paper. The effectiveness of these arrangements is patent, especially regarding the efficiency and heating performance.…”

Section: Introductionmentioning

confidence: 99%

EMI Reduction Via Resonator Coils in Glassless Integrated Domestic Induction Systems

Plumed¹,

Lope

Acero

2021

IEEE Access

View full text Add to dashboard Cite

This paper explores the magnetic flux emissions of induction heating systems compared with inductively coupled heating systems. Inductively coupled heating uses a resonator coil attached to the ferromagnetic load in order to improve energy transfer from the appliance to the load. The magnetic flux emissions of both kinds of systems are simulated, and their dependence on coil current and turn number is outlined. The paper focuses on emitted near field, whose measurement and limits are determined by norm. Several prototypes are developed and tested to verify the simulations.INDEX TERMS Induction heating, appliances, inductive power transmission, electromagnetic interference.

show abstract

Resonant Analysis of Magnetic Coupling Wireless Power Transfer Systems

Cited by 50 publications

References 30 publications

An Optimization Method for Simultaneous Wireless Power and Data Transfer Systems

An Optimization Method for Simultaneous Wireless Power and Data Transfer Systems

Wireless Power Transfer under Wide Distance Variation Using Dual Impedance Frequency

EMI Reduction Via Resonator Coils in Glassless Integrated Domestic Induction Systems

Contact Info

Product

Resources

About