A Smart Autonomous WPT System for Electric Wheelchair Applications With Free-Positioning Charging Feature

Azad, Ahmed; Tavakoli, Reza; Pratik, Ujjwal; Varghese, Benny J.; Coopmans, Calvin; Pantic, Zeljko

doi:10.1109/jestpe.2018.2884887

Cited by 35 publications

(4 citation statements)

References 18 publications

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“…To overcome misalignment effects, multiple input–single output (MISO) coil systems can be realized [ 61 ], which are composed of multiple transmitter coils connected in series [ 62 , 63 ] or parallel [ 64 , 65 ]. The sending coils can be activated simultaneously [ 62 ] or one-by-one independently [ 65 ] using multiple supply circuits [ 66 ], switches [ 64 , 67 ] or both [ 68 ]. The main difference between systems used to charge batteries and those to supply battery-free devices is the detection procedure.…”

Section: Energy Supply For Wireless Sensor Nodesmentioning

confidence: 99%

Energy-Aware System Design for Autonomous Wireless Sensor Nodes: A Comprehensive Review

Kanoun

Bradai

Khriji

et al. 2021

Sensors

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Nowadays, wireless sensor networks are becoming increasingly important in several sectors including industry, transportation, environment and medicine. This trend is reinforced by the spread of Internet of Things (IoT) technologies in almost all sectors. Autonomous energy supply is thereby an essential aspect as it decides the flexible positioning and easy maintenance, which are decisive for the acceptance of this technology, its wide use and sustainability. Significant improvements made in the last years have shown interesting possibilities for realizing energy-aware wireless sensor nodes (WSNs) by designing manifold and highly efficient energy converters and reducing energy consumption of hardware, software and communication protocols. Using only a few of these techniques or focusing on only one aspect is not sufficient to realize practicable and market relevant solutions. This paper therefore provides a comprehensive review on system design for battery-free and energy-aware WSN, making use of ambient energy or wireless energy transmission. It addresses energy supply strategies and gives a deep insight in energy management methods as well as possibilities for energy saving on node and network level. The aim therefore is to provide deep insight into system design and increase awareness of suitable techniques for realizing battery-free and energy-aware wireless sensor nodes.

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Section: Energy Supply For Wireless Sensor Nodesmentioning

confidence: 99%

Energy-Aware System Design for Autonomous Wireless Sensor Nodes: A Comprehensive Review

Kanoun

Bradai

Khriji

et al. 2021

Sensors

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“…The regenerative braking operation concerning electric wheelchairs is studied in [388,389], based on boost-type and buck-boost unidirectional dc-dc converters, respectively. The design and implementation of a solar power integration in an electric wheelchair, with a solar photovoltaic panel acting as a roof for the wheelchair, is presented in [390], and the battery charging operation via IWPT for electric wheelchairs is studied in [391], with the primary circuitry being based on a full-bridge inverter and the secondary based on a diode full-bridge ac-dc converter and a buck-type dc-dc converter.…”

Section: Other Small Electric Vehiclesmentioning

confidence: 99%

A Review on Power Electronics Technologies for Electric Mobility

et al. 2020

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Concerns about greenhouse gas emissions are a key topic addressed by modern societies worldwide. As a contribution to mitigate such effects caused by the transportation sector, the full adoption of electric mobility is increasingly being seen as the main alternative to conventional internal combustion engine (ICE) vehicles, which is supported by positive industry indicators, despite some identified hurdles. For such objective, power electronics technologies play an essential role and can be contextualized in different purposes to support the full adoption of electric mobility, including on-board and off-board battery charging systems, inductive wireless charging systems, unified traction and charging systems, new topologies with innovative operation modes for supporting the electrical power grid, and innovative solutions for electrified railways. Embracing all of these aspects, this paper presents a review on power electronics technologies for electric mobility where some of the main technologies and power electronics topologies are presented and explained. In order to address a broad scope of technologies, this paper covers road vehicles, lightweight vehicles and railway vehicles, among other electric vehicles.

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“…Typically, WPT systems utilize multiple coils in transmission or reception to increase the effective charging area while geometry opti-mization techniques are implemented to reduce the efficiency drop caused by misalignment [19]- [28]. In [21] coil arrays are employed on the transmitting side to form a large 100 kHz charging area for electric wheelchairs. Although freepositioning and high efficiency are achieved, the transmitter area is 0.75 m 2 and uses three coil layers stacked one above the other.…”

Section: Introductionmentioning

confidence: 99%

Novel Pulsed WPT System With Data Transfer Capability for Condition Monitoring of Industrial Rotating Equipment

Salvati,

Palazzi,

Alimenti

et al. 2024

IEEE Access

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In this paper, we present a 6.78 MHz Pulsed Wireless Power Transfer (PWPT) system specifically designed for powering the electronics placed on a suction roll of a paper mill machinery, thus enabling rotating equipment monitoring. The system utilizes a pair of different resonant coils to maintain a stable coupling coefficient for a fraction of the roll rotation period while guaranteeing compactness and ease of installation. Designed using both Commercial-off-the-Shelf (COTS) and custom components, the developed WPT system achieves a DC-DC efficiency of 62% in the specific working conditions. The transferred power is used to supply an Internet-of-Things (IoT) node that continuously measures and transmits data about the operation status. A fully operational system for battery and angular position monitoring has been developed and tested in a laboratory environment. This research presents a comprehensive analysis of the system and explores the interaction of different coils to maintain a stable coupling coefficient in dynamic applications. The same approach can be employed for rotating machinery with similar geometrical constraints or more general dynamic application characterized by periodic movements and limited space for the coupling system.

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A Smart Autonomous WPT System for Electric Wheelchair Applications With Free-Positioning Charging Feature

Cited by 35 publications

References 18 publications

Energy-Aware System Design for Autonomous Wireless Sensor Nodes: A Comprehensive Review

Energy-Aware System Design for Autonomous Wireless Sensor Nodes: A Comprehensive Review

A Review on Power Electronics Technologies for Electric Mobility

Novel Pulsed WPT System With Data Transfer Capability for Condition Monitoring of Industrial Rotating Equipment

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