Study of Wireless Power and Information Transmission Technology Based on the Triangular Current Waveform

Zhou, Yan; Zhu, Xiaoyan; Wang, Lin; Wang, Baoyun

doi:10.1109/tpel.2017.2678503

Cited by 41 publications

(25 citation statements)

References 19 publications

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“…The coupling coefficient M ns between L n and L s should be minimized to avoid the effect of interference signal from L n on L s . The geometry and positioning of the three coils coincide with [22].…”

Section: The Proposed Wpdt System a Structure And Working Princimentioning

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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Section: The Proposed Wpdt System a Structure And Working Princimentioning

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%

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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“…A WPIT system has been proposed in which the fundamental component of the triangular current waveform is employed to transfer power, and its third-order harmonic component is selected to transfer information [34].…”

Section: Wireless Power Transfer For Park-and-chargementioning

confidence: 99%

State-of-the-Art Electromagnetics Research in Electric and Hybrid Vehicles (Invited Paper)

Chau¹,

Jiang²,

Han³

et al. 2017

PIER

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Abstract-There is no doubt that electrified vehicles are superseding internal combustion engine vehicles for road transportation. Among them, electric vehicles (EVs) have been identified as the greenest road transportation while hybrid EVs have been tagged as the super ultra-low emission vehicles. In this paper, the definition, classification, merits and demerits of electric and hybrid vehicles are first introduced. Then, after revealing their multidisciplinary technologies and development trends, the state-of-the-art electromagnetics research in electric and hybrid vehicles are discussed, with emphasis on electric motors for electric propulsion, electric machine systems for hybrid propulsion, wireless power transfer technologies for park-and-charge a well as move-and-charge, electromagnetic interference and compatibility issues in EVs, electromechanical flywheels for energy storage and magnetic sensors for EV operation. Meanwhile, the development trend of these research areas is revealed.

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“…In [11], theory of high-order modulation for near-field RF identification (RFID) and WPT was presented. A system that transmits power using a triangular current waveform and transmits information to its third-order harmonic was reported in [12]. In [13], a WPIT technology based on binary frequency shift keying modulation using the dual bands of a series-parallel combined resonant circuit was proposed.…”

Section: Introductionmentioning

confidence: 99%

Design of Wireless Power and Information Transfer Systems Considering Figure of Merit for Information

Kim

Lee

2020

J Electromagn Eng Sci

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Inductively coupled resonant wireless power transfer (WPT) systems can be used as a wireless power and information transfer (WPIT) system by properly adding the function of varying Rx loads. A new metric for the figure of merit for information transfer from Rx to Tx is proposed as the ratio of Tx input impedances for the Rx shorted and optimum loads to systematically assess the information transfer. While most of WPT and near-field communication (NFC) devices have been adopted for very short distances between Tx and Rx, this work shows that the WPIT systems using inductively coupled resonant structures with high Q-factor coils enable much longer working distances with the best power transfer efficiency and information transfer capability. Several design examples show that the newly proposed figure of merit for information transfer is an essential metric in the understanding and design of WPIT systems. The theory is validated with circuit and electromagnetic simulations for various system configurations.

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Study of Wireless Power and Information Transmission Technology Based on the Triangular Current Waveform

Cited by 41 publications

References 19 publications

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

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

State-of-the-Art Electromagnetics Research in Electric and Hybrid Vehicles (Invited Paper)

Design of Wireless Power and Information Transfer Systems Considering Figure of Merit for Information

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