High-Efficiency Coupling-Insensitive Wireless Power and Information Transmission Based on the Phase-Shifted Control

Zhou, Yan; Wang, Lin; Wang, Baoyun

doi:10.1109/tpel.2017.2771291

Cited by 23 publications

(9 citation statements)

References 21 publications

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“…The self‐resonant frequency (SRF) of the system is equal to the fundamental frequency, so the high‐frequency signal will be greatly suppressed when transmitting to the secondary side, but the large volume is required for improvement. A new technology for realising WPIT by utilising harmonics has been proposed in [22, 23], in which the fundamental and third harmonic components are used to transfer power and information, respectively; signal modulation is realised by changing the operation frequency of the inverter. The secondary side of the two‐coil structure is designed to reduce the interference between the coils.…”

Section: Introductionmentioning

confidence: 99%

WPIT technology based on the fundamental‐harmonic component for a single‐channel and two‐coil ICPT system

Xia

Jia

et al. 2019

IET Power Electronics

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In order to realise wireless power and information transmission (WPIT), extra signal transmission coils are added in a traditional inductively coupled power transmission (ICPT) system, which results in a complicated structure and increases the volume and cost. Moreover, crosstalk existing between the power and signal channel makes it difficult to analyse and design. Therefore, WPIT technology based on the fundamental-harmonic component for a single-channel and two-coil ICPT system is proposed, in which the signal is transferred via the third harmonic component of the triangular current flowing in the transmitting coil. The working mechanism, crosstalk among circuits, parameter selection principle of signal detection channel are analysed, and the impact of load conditions on harmonic communication quality and that of signal transmission on efficiency are discussed. The experiment results show that the method can effectively simplify the structure, reduce the volume and cost, and fundamentally simplify the modelling, analysis, and design of the system, and high-quality power and information synchronous transmission can be achieved.

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Section: Introductionmentioning

confidence: 99%

WPIT technology based on the fundamental‐harmonic component for a single‐channel and two‐coil ICPT system

Xia

Jia

et al. 2019

IET Power Electronics

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“…Similar efficiencies in both of these modes is unsurprising since the efficiency is defined by (11). Benefitting from a single-ended converter design with higher Q coil values and ZVS conditions in S 2 , the ACI shows an efficiency improvement of nearly 7% compared with full-bridge converters operating under the same conditions [22], [23].…”

Section: Resultsmentioning

confidence: 99%

“…Unlike the symmetric waveforms in [22], [23], the ACI produces an unsymmetrical waveform during a switching period. u p in Fig.…”

Section: The Proposed Wpdt System a Structure And Working Princimentioning

confidence: 99%

“…Power transfer inverters using ON-OFF keying data modulation have been used for several years but suffer from greatly reduced power transfer efficiencies [15]- [21]. Based on a symmetrical waveform, novel WPDT methods using fundamental components to transfer power, and harmonics to transmit data have been previously proposed [22], [23]. Using harmonic components to transmit data can avoid to build the additional circuits of signal sources.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Wireless Power and Data Transmission Based on Unsymmetrical Current Waveforms With Duty Cycle Modulation

et al. 2020

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This paper proposes an active-clamped inverter (ACI) with duty cycle modulation for achieving simultaneous wireless power and data transmission (WPDT). The proposed method adjusts harmonic amplitudes by changing the duty cycle of the inverter, as a means to encode information alongside power using a shared wireless channel. This method generates a variable unsymmetrical current waveform corresponding with different duty cycles. By controlling the duty cycle, simultaneous power and data transfer can be achieved by using the fundamental and harmonic components respectively. The ACI is designed to operate in continuous current mode to reduce the variation of harmonic components, even under no load conditions. A simple ACI containing two switches is proposed to generate unsymmetrical current waveforms with a high efficiency and high circuit quality factor Q. Two communication methods are developed to balance the power transfer capability and signal-noise-ratio (SNR). Various separation distances and loads are tested, with experimental results showing the proposed system can achieve simultaneous power and data transfer across a shared channel in an inductive wireless power transfer.

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“…Wireless power transfer (WPT) technology has been attracting academical and industrial attention for its advantages of canceling the twisted electrical wires by transferring energy through a relatively large air gap with the magnetic field. With the merit of convenience, weatherproof, and low risk of hazards [1], WPT technology has been applied to many applications [2][3][4][5][6] with power levels ranging from milliwatt [7] to megawatt [8].…”

Section: Introductionmentioning

confidence: 99%

Optimal load ratio control for dual‐receiver dynamic wireless power transfer maintaining stable output voltage

Liu

2019

IET Power Electronics

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Dynamic wireless power transfer (DWPT) system can provide a power supply for electric vehicles (EVs) in motion which can increase the available charging time, lessen the anxiety of driving range, and reduce the batteries in EVs. Aimed at optimising the system efficiency while regulating the output voltage, an optimal load ratio control strategy is proposed to optimise the power distribution of the dual-receiver DWPT system, and to reduce the losses of the system as the receivers move along the transmitter track. The control strategy is implemented in the receiver side without the mutual inductance detection and the communication with the transmitter side. With the proposed method, the efficiency of the DWPT system can be optimised while the output voltage of the system can be regulated simultaneously. An experimental prototype is set up to validate the proposed method. The system efficiency with proposed method reaches 90.8-91.9% during various conditions in the experiments. The maximum efficiency improvement is 2.5% compared with the efficiency of the single receiver method, and it increases to 2.6% compared to that of the current balancing method.

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High-Efficiency Coupling-Insensitive Wireless Power and Information Transmission Based on the Phase-Shifted Control

Cited by 23 publications

References 21 publications

WPIT technology based on the fundamental‐harmonic component for a single‐channel and two‐coil ICPT system

WPIT technology based on the fundamental‐harmonic component for a single‐channel and two‐coil ICPT system

Simultaneous Wireless Power and Data Transmission Based on Unsymmetrical Current Waveforms With Duty Cycle Modulation

Optimal load ratio control for dual‐receiver dynamic wireless power transfer maintaining stable output voltage

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