Design Procedure Based on Maximum Efficiency for Wireless Power Transfer Battery Chargers with Lightweight Vehicle Assembly

Simonazzi, Mattia; Campanini, Alessandro; Sandrolini, Leonardo; Rossi, Claudio

doi:10.3390/en15010070

Cited by 17 publications

(9 citation statements)

References 25 publications

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“…In this paper, an array of six resonators has been considered, whose parameters are reported in Table 1 : receiver circuit parameters, which depend on the target application, and the termination impedance that can be adjusted as desired. A typical on-board battery charging system of the type illustrated in [ 21 , 24 ] has been considered as receiver load, which supplies the automotive battery pack described in [ 31 ]. The parameters of the receiver circuit are reported in Table 2 .…”

Section: Resonator Array Input Impedancementioning

confidence: 99%

Receiver–Coil Location Detection in a Dynamic Wireless Power Transfer System for Electric Vehicle Charging

Simonazzi

Sandrolini

Mariscotti

2022

Sensors

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Receiver position sensing is investigated in a dynamic wireless power transfer (DWPT) system for electric vehicle (EV) charging. Exploiting the peculiar behaviour of the resonator arrays input impedance, it is possible to identify the position of the receiver coil by exciting the first array resonator with a signal at a proper frequency and measuring the resulting current. An analytical expression of the input impedance of the resonator array coupled with the EV receiver coil placed in a generic position is provided; its sensitivity to different circuit parameters is also analysed. The outline of a simple and effective algorithm for the localization of the EV is proposed and applied to a test case.

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Section: Resonator Array Input Impedancementioning

confidence: 99%

Receiver–Coil Location Detection in a Dynamic Wireless Power Transfer System for Electric Vehicle Charging

Simonazzi

Sandrolini

Mariscotti

2022

Sensors

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“…Wireless power transmission (WPT), also known as wireless power transfer, is of great concern due to its potential applications, and flexible charging system [1][2][3][4]. A WPT system is essentially defined as a system that can efficiently transmits electric power from one point to another through the space or earth's atmosphere without using wires [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The transmitting antenna is designed to focus the radiated power towards the receiving end with high efficiency, whereas the rectenna is used to collect the power. The flexible charging mode makes WPT systems attractive to numerous commercial and industrial applications, such as smart phones, RFID tags, unmanned aerial vehicles, hybrid electric vehicles, and others [1][2][3][4][5][6][7][8][9][10][11]. In general, the beam collection efficiency (BCE) significantly decreases with the increase in the transmission range [3].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the range-independent steering direction, the power spill over to regions other than the desired receiving region from the main beam of a phased array along the transmission direction adversely affect the BCE efficiency. Therefore, FDAs with the ability to control the transmitted energy distribution in both range and angle domains which is not accessible to phased arrays is considered to be a viable option for the far-field WPT systems [3,4,26]. To take full advantage of the controllable range-dependent energy distribution, an active research topic has been centered on the FDA based WPT systems.…”

Section: Introductionmentioning

confidence: 99%

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Accurate Theoretical Models for Frequency Diverse Array Based Wireless Power Transmission

et al. 2022

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Wireless power transfer (WPT) is a well-known problem, and has received wide attention in the next generation industrial applications and consumer electronics. On the other hand, frequency diverse array (FDA) is a new concept with the ability to generate a range-angle dependent beampattern. Therefore, some researchers are engaged in designing WPT systems based on the FDA framework (FDA-WPT) instead of phased arrays. Unlike phased arrays, the FDA beampattern is time-variant. Therefore, existing beam collection efficiency models based on the phased array are not suitable for the FDA-WPT system. More importantly, the time-variant property of FDAs is usually ignored in the literature, and the system configuration of the target area where the power-harvesting end is located does not conform to the actual WPT scenario. In this paper, we derive and present accurate models of the FDA-WPT system. The power transfer performance of the corrected FDA-WPT system is then compared with the phased array based WPT system. Simulation results demonstrate that time-variant consideration in the FDA-WPT model causes difficulty in controlling the main beam direction to focus the power. The accurate FDA-WPT is theoretically investigated, and numerical simulations are implemented to validate the theoretical analysis.

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“…Several different technologies have been proposed in literature for both stationary and dynamic charging. [4][5][6] For high-power transfer, among near-field WPT technologies, inductive power transfer (IPT) is largely employed. One of its major limits is the misalignment between the transmitter and receiver apparatuses, which dramatically affects the efficiency and the transferred power.…”

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confidence: 99%

Two‐port network compact representation of resonator arrays for wireless power transfer with variable receiver position

Sandrolini

Simonazzi

Barmada

et al. 2022

Circuit Theory & Apps

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This paper presents an equivalent circuit characterization of an array of resonators for wireless power transfer (WPT) applications. These apparatuses are composed of magnetically coupled resonant coils acting as a transmitter which feeds a receiver coil that can be placed over them at any position, allowing the tolerance of the system to the receiver misalignment to be dramatically enhanced. This advantage makes resonator arrays a suitable solution for both low-and high-power applications. The latter usually involve battery charging, with the resonator array acting as a transformer stage, ensuring galvanic isolation. An equivalent two-port network can be defined for any receiver position, allowing the array to be treated as a traditional transformer. Thereby, the simulation of the system can be simplified, as it is required in the design steps of a converter and control strategy. Analytical expressions of the two-port network parameters are proposed for arrays of any size and length. The formulas have been numerically and experimentally validated.battery charging, circuit modeling, inductive power transfer, resonator array, transformer, wireless power transfer | INTRODUCTIONIn the last decade, wireless power transfer (WPT) systems have become a convenient and reliable solution in many applications, ranging from powering portable electronic devices to automatic machines and electric vehicle (EV) charging. [1][2][3] These apparatuses offer many advantages, as the ability of operating in difficult environments or the possibility to transfer power to moving loads. The size and weight of high-power batteries can be reduced by more frequent charging, which can be dramatically eased by wireless chargers. Several different technologies have been proposed in literature for both stationary and dynamic charging. [4][5][6] For high-power transfer, among near-field WPT technologies, inductive power transfer (IPT) is largely employed. One of its major limits is the misalignment between the transmitter and receiver apparatuses, which dramatically affects the efficiency and the transferred power. In order to improve the tolerance to the misalignment, arrays of magnetically coupled resonating L-C circuits (also referred as relay coils) can be used, which represent a very cheap solution since only few passive electronic components are required. [7][8][9][10][11] In these systems, the power travels from the source to the load through the relay coils at the expense of an increased sensitivity to the mismatch between the input and output side impedances, 12,13 which reflects also on the magnetic near-field distribution. 14 Solutions to this problem have been proposed in Sandoval et al, 15,16 making arrays of

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Design Procedure Based on Maximum Efficiency for Wireless Power Transfer Battery Chargers with Lightweight Vehicle Assembly

Cited by 17 publications

References 25 publications

Receiver–Coil Location Detection in a Dynamic Wireless Power Transfer System for Electric Vehicle Charging

Receiver–Coil Location Detection in a Dynamic Wireless Power Transfer System for Electric Vehicle Charging

Accurate Theoretical Models for Frequency Diverse Array Based Wireless Power Transmission

Two‐port network compact representation of resonator arrays for wireless power transfer with variable receiver position

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