Design and Implementation of a Cost-Effective Wireless Charger for an Electric Bicycle

Triviño-Cabrera, Alicia; González-González, José M.; Aguado, José A.

doi:10.1109/access.2021.3084802

Cited by 19 publications

(4 citation statements)

References 24 publications

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“…Regarding the compensation networks, uni-resonant topologies offer a cost-effective solution, specially suitable for wireless charging with null or not relevant coil misalignments [16], [17]. This is the type of scenarios we are working with the e-scooter, so we will study these compensation networks.…”

Section: Compensation Systemsmentioning

confidence: 99%

“…The comprehensive application of WPT to e-scooters, including optimal coil design and enhanced control, is not straightforward, as it has been demonstrated by some previous designs of wireless chargers for e-bicycles [17] or wheelchairs [9]. The particular position of the surrounding materials, the location of the battery and the temperature of the vehicle are key elements that affect the WPT.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Design of a Wireless Charger Prototype for an e-Scooter

et al. 2023

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Individual mobility vehicles are revolutionizing transportation in the urban environment. Among them, e-scooters are one of the fastest growing vehicles. However, these vehicles have some drawbacks such as incompatibility among different chargers or reduced autonomy, which especially affects e-scooters rental. Wireless charging is presented as a solution to these drawbacks since it allows the batteries to be charged without user intervention. This paper addresses the design process and implementation details related to a magnetic-resonance charger for an e-scooter. In contrast to the previous works, we present a comprehensive approach that addresses the design of the coil topology, the dimensions of the ferrite tiles, the definition of the gap and the optimised control for a CC-CV charge. The main contribution of the work is the consideration of all these issues jointly while we also take into account the vehicle's materials and structure for an accurate design and implementation. The dimensions of the vehicle impose a strong restriction on the coil design. Therefore, a detailed analysis about the location of the secondary and primary coils in a real e-scooter is executed with Ansys Maxwell. The study about the geometries of ferrite tiles is also performed considering the particularities of this type of vehicle. This study led to an optimal solution for the coil geometries and ferrite placement that minimizes the costs. The proposed system has been validated with the implementation of a real prototype of 100 W, to which a CC-CV control has been incorporated to achieve a safe charge for different battery states. The control can be easily adapted for a wide range of e-scooters. In this way, the use of this type of chargers on public installations can be maximized.

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Section: Compensation Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized Design of a Wireless Charger Prototype for an e-Scooter

et al. 2023

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“…Few articles use the circular pad, which is simple but it offers an acceptable performance [6]. Circular coils can be found in e-scooters [21], personal mobility devices [22], drones [23], [24] or ebikes [25]. The effect of misalignment on the power transfer and on the magnetic integration is a common topic discussed in the related work but the effect of both the magnetic integration and misalignment on the efficiency is a topic only studied in [15]- [18], [20] .…”

Section: Introductionmentioning

confidence: 99%

Magnetic Integration of Circular Pads and LCC-LCC for EV Wireless Charging Tolerant to Misalignment

Quirós,

Guerrero,

Sangeno

et al. 2023

IEEE Access

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from the "Proyectos de I+D+i -RTI Tipo A" programme ABSTRACT A key component of the magnetic resonant chargers is the coupler, which must be connected to the compensation networks to improve the power transfer. The design of both structures are tighly related since the configuration of one affects the other. Thus, the integration of both structures is convenient to ease the development of other systems of the wireless charger such as the power converters and control. This integration can be optimized if physical aspects are considered. In this paper, we propose a novel physical integration of circular pads and a LCC-LCC compensation. If both systems are connected without any specific consideration, the inclusion of the reactive components in this high-order compensation network derives in a more bulky-structure. Our proposal consists in implementing the inductors of the compensation networks in the same structure of the power coils, leading to a compact system. The position of the compensation coils must be carefully analysed in order to minimise undesired coupling effects. In the proposed integration approach, we have analysed the coupling coefficients between the magnetic components for several positions to identify the optimised configuration. The feasibility of this compact structure has been validated in a prototype, proving that the power transfer levels are suitable. These tests have been carried out for different misalignment conditions, which could model its performance for dynamic charging.

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“…The power level to be transferred in the charging of e-bikes and the voltage level of the battery group are low. In e-bike applications encountered in the literature, the system responses have been examined by connecting a DC supply to the inverter input [23][24][25][26][27][28][29], or a DC-link voltage in the range of 60-85 V can be achieved on the primary side using a grid-connected step-down transformer [30]. In The battery characteristics should be taken into account when designing an IPT for the electrical device to be wirelessly charged.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of a Wireless Charging System Connected to the AC Grid for an E-Bike

Yıldırız

Bayraktar²

2022

Energies

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This paper aims to design an IPT for wireless charging of an e-bike and to control the charge of the e-bike from the primary-side. Optimum IPT design has been made according to the 36 V battery bank requirements. The no-load condition test has been performed before charging started in the IPT system connected to the AC grid. The primary-side DC-link voltage of 4–5 V required for this test is provided by the designed forward converter. The charge control has been also made from the forward converter on the primary-side. For this, the forward converter’s operation in peak current mode (PCM) has been used. Finally, a prototype has been implemented that works at a maximum DC/DC efficiency of 87.52% in full alignment and 83.63% in 3 cm misalignment. The proposed control algorithm has been tested in this prototype at different load stages.

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Design and Implementation of a Cost-Effective Wireless Charger for an Electric Bicycle

Cited by 19 publications

References 24 publications

Optimized Design of a Wireless Charger Prototype for an e-Scooter

Optimized Design of a Wireless Charger Prototype for an e-Scooter

Magnetic Integration of Circular Pads and LCC-LCC for EV Wireless Charging Tolerant to Misalignment

Design and Implementation of a Wireless Charging System Connected to the AC Grid for an E-Bike

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