An Overview of Regulation Topologies in Resonant Wireless Power Transfer Systems for Consumer Electronics or Bio-Implants

Liu, Yang; Li, Bin; Huang, Mo; Chen, Zhijian; Zhang, Xiu Yin

doi:10.3390/en11071737

Cited by 23 publications

(22 citation statements)

References 48 publications

(153 reference statements)

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“…Over the last few years, wireless power transfer (WPT) has increasingly attracted industry and academia attention, and it is utilized in an increasing number of applications. One of the WPT systems main applications is that of battery charging in biomedical implants [1], electric vehicle wireless charging [2][3][4], mobile phone and electronic consumers [5,6], moving robots [7], and wireless sensors [8,9]. This is due to advantages introduced by this technology; some of them are as follows: WPT allows the product to be completely sealed, making it waterproof; it facilitates the charging process avoiding the use of bulky power cables; and finally, it allows the product life to be increased.…”

Section: Introductionmentioning

confidence: 99%

Zero Voltage Switching Condition in Class-E Inverter for Capacitive Wireless Power Transfer Applications

Corti

Reatti

et al. 2021

Energies

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This paper presents a complete design methodology of a Class-E inverter for capacitive wireless power transfer (CWPT) applications, focusing on the capacitance coupling influence. The CWPT has been investigated in this paper, because most of the literature refers to inductive power transfer (IWPT). However, CWPT in perspective can result in lower cost and higher reliability than IWPT, because it does not need coils and related shields. The Class-E inverter has been selected, because it is a single switch inverter with a grounded MOSFET source terminal, and this leads to low costs and a simple control strategy. The presented design procedure ensures both zero voltage switching (ZVS) and zero derivative switching (ZDS) conditions at an optimum coupling coefficient, thus enabling a high transmission and conversion efficiency. The novelties of the proposed method are that the output power is boosted higher than in previous papers available in the literature, the inverter is operated at a high conversion efficiency, and the equivalent impedance of the capacitive wireless power transfer circuit to operate in resonance is exploited. The power and the efficiency have been increased by operating the inverter at 100 kHz so that turn-off losses, as well as losses in inductor and capacitors, are reduced. The closed-form expressions for all the Class-E inverter voltage and currents waveforms are derived, and this allows for the understanding of the effects of the coupling coefficient variations on ZVS and ZDS conditions. The analytical estimations are validated through several LTSpice simulations and experimental results. The converter circuit, used for the proposed analysis, has been designed and simulated, and a laboratory prototype has been experimentally tested. The experimental prototype can transfer 83.5 W at optimal capacitive coupling with operating at 100 kHz featuring 92.5% of the efficiency, confirming that theoretical and simulation results are in good agreement with the experimental tests.

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Section: Introductionmentioning

confidence: 99%

Zero Voltage Switching Condition in Class-E Inverter for Capacitive Wireless Power Transfer Applications

Corti

Reatti

et al. 2021

Energies

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“…2 and listed in Table 1 where the most important parameters are displayed. The topic is a recent trend of research and very extensive, thus a review for the whole topic becomes long and exhausting for the reader (Abou Houran et al, 2018;Liu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

A Review of Methods and Challenges for Improvement in Efficiency and Distance for Wireless Power Transfer Applications

Kuka

Alkahtani

2020

Power Electronics and Drives

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Over the past few years, interest and research in wireless power transfer (WPT) have been rapidly incrementing, and as an effect, this is a remarkable technology in many electronic devices, electric vehicles and medical devices. However, most of the applications have been limited to very close distances because of efficiency concerns. Even though the inductive power transfer technique is becoming relatively mature, it has not shown near-field results more than a few metres away transmission. This review is focused on two fundamental aspects: the power efficiency and the transmission distance in WPT systems. Introducing the principles and the boundaries, scientific articles will be reviewed and discussed in terms of their methods and respective challenges. This paper also shows more important results in efficiency and distance obtained, clearly explaining the theory behind and obstacles to overcome. Furthermore, an overlook in other aspects and the latest research studies for this technology will be given. Moreover, new issues have been raised including safety and security.

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“…Many efforts have been contributed to regulate the output voltage of the WPT system, including the transmitter side (TX) regulation and receiver side (RX) regulation [3]. The overall diagram of the TX and RX regulation methods is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Practical method for self‐adaptive voltage stabilising of high‐frequency wireless power transfer system

Liu

Chen

Chenjian

2020

IET Power Electronics

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Voltage stabilisation is indispensable for every energy converter, including a wireless power transfer system. With the increase of frequency, the resistance of the receiving coil would turn out to be elevated obviously, which would lead traditional voltage regulators composed by a buck-boost converter to existing an unsteady operation region. A logical control scheme is proposed to overcome this obstacle, which could self-adaptively stabilise the output voltage without the course of feedback. The proposed method could realise the function of voltage stabilising at a larger range of distance comparing to the traditional scheme of buck-boost converter with the same conditions. Two improved structures are built based on the proposed scheme to prevent buck-boost converter stepping into the unsteady region, and experiments are finally implemented to verify the effectiveness and correctness of the proposed method.

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An Overview of Regulation Topologies in Resonant Wireless Power Transfer Systems for Consumer Electronics or Bio-Implants

Cited by 23 publications

References 48 publications

Zero Voltage Switching Condition in Class-E Inverter for Capacitive Wireless Power Transfer Applications

Zero Voltage Switching Condition in Class-E Inverter for Capacitive Wireless Power Transfer Applications

A Review of Methods and Challenges for Improvement in Efficiency and Distance for Wireless Power Transfer Applications

Practical method for self‐adaptive voltage stabilising of high‐frequency wireless power transfer system

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