Bibliographies thématiques / Inductive power transfer, electric vehicles, recharge systems

Littérature scientifique sur le sujet « Inductive power transfer, electric vehicles, recharge systems »

Auteur : Grafiati

Publié le 14 mars 2023

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Articles de revues sur le sujet "Inductive power transfer, electric vehicles, recharge systems"

Kuehl, Alexander, Maximilian Kneidl, Johannes Seefried, Michael Masuch, Michael Weigelt et Joerg Franke. « Production Concepts for Inductive Power Transfer Systems for Vehicles ». Energies 15, n^o 21 (25 octobre 2022) : 7911. http://dx.doi.org/10.3390/en15217911.

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The option of wireless energy transmission in electric vehicles can become the main market driver for electric vehicles due to its distinct advantages, such as range, weight, or costs, over conventional conductive charging solutions. In addition to the great potential, which different research work and realized systems have already shown, there are new requirements for the associated production networks in the automotive industry which must be addressed at an early stage. Furthermore, no solutions currently exist for the industrial production of these components. This paper presents the main components for the feasibility of wireless power transmission in electric vehicles. In addition, the required value chains and processes for the new components of the inductive power transfer systems, and the final assembly for induction coils, which has been developed at the FAU, will be presented. These include the developing of a winding process on a 15-axis special machine, ultrasonic crimping of the litz wire ends, and vacuum potting.

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Hou, Chung-Chuan, et Kuei-Yuan Chang. « Inductive Power Transfer Systems for Bus-Stop-Powered Electric Vehicles ». Energies 9, n^o 7 (30 juin 2016) : 512. http://dx.doi.org/10.3390/en9070512.

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Revathi Shree, K. « Inductive Power Transfer to Charge Electric Bicycles ». Asian Journal of Electrical Sciences 8, S1 (5 juin 2019) : 25–28. http://dx.doi.org/10.51983/ajes-2019.8.s1.2313.

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Inductive power transfer is nothing but wireless power transfer. That is transferring power from transmitter to receiver side without any physical contact. Nowadays this technique has wide applications. Mainly it is used to charge the batteries of the electric vehicles (EV). Due to the increasing pollution rate and scarcity of fuel in future days, the demand for the electric vehicles is increasing. Charging EV’s using IPT is simpler and risk free when compared to traditional wired charging systems. Using IPT technique the battery can be charged in constant current (CC) and constant voltage (CV) modes without using any feedback. A switch (consists of 2 AC switches and capacitor) is used to change the mode from CC to CV. The current output from the CC and the voltage output from the CV mode are load independent. This can be obtained by proper selection of inductances and capacitors. Here the feedback control techniques are not required to regulate the output according to charging profile. This IPT technique to charge battery is economical because using a single inverter many batteries can be charged at a time. The possibility of this method of charging is tested with an experimental prototype for efficiency and using MATLAB/SIMULINK software the simulation results are obtained for stability of current and voltage output of CC and CV mode.

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M, Ponmani Raja, Karthik Chandran, Jeyakkannan N, John Paul et Jibin Jaison. « Dynamic Wireless Charging for Inductive Power Transfer Systems in Electric Vehicles ». ECS Transactions 107, n^o 1 (24 avril 2022) : 2665–72. http://dx.doi.org/10.1149/10701.2665ecst.

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The charging plate creates magnetic fluxing. The charging plate and the adjacent coil can induce current without any contact. By the new trends, wireless charging got more social attention to the outside world as an alternative method for primitive wired charging. Even though wireless charging was implemented to various electronics industries, it is still proven that wired charging is faster than the wireless. But can make the gadget hot, which may not be good for the battery efficiency. The wireless charging does not degrade the battery. A vehicle that is powered by an electric motor rather than a typical petrol or diesel engine is referred to as an electric vehicle. The electric motor is powered by rechargeable batteries. In this article, the dynamic wireless charging of electric vehicles introduces a new methodology of charging even when the vehicle is in motion. The dynamic wireless charging is proposed to allow power transfer to the electric vehicles when they are in motion. Multiple inductive pads should be buried under the roadways. The inductive pads should be energized by a power supply. The track which is dedicated for the wireless charging should have enough distance so that the vehicles can charge up to a stable value until they leave the charging track. This proposed methodology reduces unnecessary time wastage for charging of vehicles. Hardware results obtained the primary pads mounted on road and power supply for primary roads. Besides, it will flow the efficient inductive power transfer and time saving opportunity.

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Kuncoro, C. Bambang Dwi, Min-Feng Sung, Cornelia Adristi, Arvanida Feizal Permana et Yean-Der Kuan. « Prospective Powering Strategy Development for Intelligent-Tire Sensor Power Charger Application ». Electronics 10, n^o 12 (14 juin 2021) : 1424. http://dx.doi.org/10.3390/electronics10121424.

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Tire sensors embedded in a vehicle tire are stand-alone autonomous devices. A tire sensor reserve power strategy is crucial due to sensor energy sources limitations for long operational periods. This paper presents an innovative tire sensor powering strategy for the intelligent-tire system. The powering strategy offers a green concept, maintenance-free, and low-cost method in order to extend the tire sensor lifetime for long operating periods. The proposed strategy adopts wireless power transfer (WPT) technology to transfer power to an electrical load mounted on the rotational system without an interconnection cable. It is composed of a power transmitter designed to be mounted on the vehicle’s inner fender liner, and a power receiver that provides power to recharge the tire sensor battery/energy storage. The transmitter transfers power from the vehicle battery/accumulator to a power receiver coupled with the tire sensor which is mounted on the vehicle tire inner wall. WPT devices were designed based on induction electromagnetic coupling and can provide an output current up to 1A at 5 V. The proposed powering strategy was verified using a vehicle tire simulator model to emulate rotational motion. A voltage and current sensor module as well microcontroller and data logger modules were utilized as the load for the developed WPT system. The verification experimental and preliminary test results reveal that the proposed strategy can provide constant power to the load (in this case, the voltage is around 4.3 V and the current is around 21.1 mA) although the vehicle tire model was rotated at different speeds from 0 rpm to 800 rpm. The proposed system has the potential and feasibility for implementation in tire sensor power applications in the intelligent-tire system.

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Jog, Pranjal, et R. K. Kumawat. « Wireless Power Transfer With Inductive Coupling for EVs ». International Journal of Swarm Intelligence Research 13, n^o 1 (1 janvier 2022) : 1–22. http://dx.doi.org/10.4018/ijsir.313666.

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Electric vehicles (EVs) are expected to replace the fuel-based vehicles on the road that are polluting the environment soon. Wireless charging is based on a concept that was developed 30 years ago, which works on inductive power transmission. EVs of all classes and power levels may presently be charged from a single ground source using wireless charging systems, which are efficient and adaptable. The entire system can be automated by utilizing wireless power transfer (WPT) technology. Designing a new mathematical expression that can be utilized to determine a charging system's efficiency is the main goal of the current effort. Then the physical variables and efficiency parameters involved in the WPT system are optimally tuned by a revamped Harris Hawks Optimization Algorithm, which is a conceptual improvement of the Harris Hawks Optimization (HHO) algorithm. Finally, an experimental investigation is carried out to prove the fact that proposed algorithm is capable of solving the test functions with greater accuracy and improved efficiency.

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MARINESCU, Andrei, Tiberiu TUDORACHE et Adrian VINTILĂ. « MIMO INDUCTIVE COUPLING FOR HIGH POWER WIRELESS SYSTEMS ». ACTUALITĂŢI ŞI PERSPECTIVE ÎN DOMENIUL MAŞINILOR ELECTRICE (ELECTRIC MACHINES, MATERIALS AND DRIVES - PRESENT AND TRENDS) 2021, n^o 1 (19 novembre 2021) : 1–10. http://dx.doi.org/10.36801/apme.2021.1.9.

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Transmitter component of high power inductive wireless transmission systems for electric busses and trucks should be embedded in the road to ensure a free circulation of vehicles and to ensure a good mechanical resistance of the pavement, in the charging region, similar to the rest of the road. In such application, ferrites cannot be envisaged as magnetic flux concentrators due to their fragility. An adequate solution to replace the ferrites consists in using magnetic concrete as magnetic field concentrator for wireless inductive transmission system. This solution is analyzed in this paper and used for an MIMO (Multiple-Input-Multiple-Output) inductive wireless power system based on Double-D structure coils, for a transferred power of 125 kW, corresponding to the standard project SAE J2954-2, sufficient for an electric bus for 50 persons. The Finite Element analysis carried out in the paper has the objective of determining the useful and parasitic magnetic coupling parameters of the proposed inductive power transfer system

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Miskiewicz, R., et A. Moradewicz. « Contactless power interface for plug-in electric vehicles in V2G systems ». Bulletin of the Polish Academy of Sciences : Technical Sciences 59, n^o 4 (1 décembre 2011) : 561–68. http://dx.doi.org/10.2478/v10175-011-0069-z.

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Contactless power interface for plug-in electric vehicles in V2G systems In the paper a bi-directional power electronic interface based on an inductive coupled contactless energy transfer system for plug-in vehicles with Vehicle-to-Grid (V2G) capability is presented. To minimize the total losses of the system, a series resonant compensation circuit is applied assuring Near to Zero-Current Switching (N2ZCS) condition for insulated-gate bipolar transistors. The analytical expression of the dc voltage and current gains as well as energy transfer efficiency is given and discussed. The system uses modified FPGA based integral control method adjusting resonant frequency and guarantees very fast and stable operation. Simulation and experimental results illustrating properties of the developed 40-60kHz switching frequency operated 15kW laboratory prototype are presented.

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Razek, Adel. « Review of Contactless Energy Transfer Concept Applied to Inductive Power Transfer Systems in Electric Vehicles ». Applied Sciences 11, n^o 7 (3 avril 2021) : 3221. http://dx.doi.org/10.3390/app11073221.

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Nowadays the groundbreaking tools of contactless energy transfer reveals new opportunities to supply portable devices with electrical energy by eliminating cables and connectors. One of the important applications of such technology is the energy providing to electric and hybrid vehicles, (EV) and (HEV). These contribute to the use of cleaner energy to protect our environment. In the present paper, after exposing the contactless energy transfer (CET) available systems, we examine the appropriateness of these systems for EV. After such exploration, it is shown that the most suitable solution is the inductive power transfer (IPT) issue. We analyze such procedure in general and indicate its main usages. Next, we consider the practice of IPT in EV and the different option in the energy managing in EV and HEV concerning battery charging. Following, we review the modes of using the IPT in immobile case and in on-road running. Following, the modeling issues for the IPT system escorting the vehicle structure are then exposed. Lastly, the electromagnetic compatibility (EMC) and human exposure analyses are assessed involving typical appliance.

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Mohamed, Ahmed A. S., Ahmed A. Shaier, Hamid Metwally et Sameh I. Selem. « An Overview of Dynamic Inductive Charging for Electric Vehicles ». Energies 15, n^o 15 (2 août 2022) : 5613. http://dx.doi.org/10.3390/en15155613.

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Inductive power transfer (IPT) technology offers a promising solution for electric vehicle (EV) charging. It permits an EV to charge its energy storage system without any physical connections using magnetic coupling between inductive coils. EV inductive charging is an exemplary option due to the related merits such as: automatic operation, safety in harsh climatic conditions, interoperability, and flexibility. There are three visions to realize wireless EV charging: (i) static, in which charging occurs while EV is in long-term parking; (ii) dynamic (in-motion), which happens when EV is moving at high speed; and (iii) quasi-dynamic, which can occur when EV is at transient stops or driving at low speed. This paper introduces an extensive review for IPT systems in dynamic EV charging. It offers the state-of-the-art of transmitter design, including magnetic structure and supply arrangement. It explores and summarizes various types of compensation networks, power converters, and control techniques. In addition, the paper introduces the state-of-the-art of research and development activities that have been conducted for dynamic EV inductive charging systems, including challenges associated with the technology and opportunities to tackle these challenges. This study offers an exclusive reference to researchers and engineers who are interested in learning about the technology and highlights open questions to be addressed.

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Thèses sur le sujet "Inductive power transfer, electric vehicles, recharge systems"

Cirimele, Vincenzo. « Design and Integration of a Dynamic IPT System for Automotive Applications ». Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS032/document.

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La transmission inductive de puissance (IPT) pour les véhicules électriques est une technologie émergente prometteuse qui semble capable d'améliorer l'acceptation de la mobilité électrique. Au cours des deux dernières décennies, de nombreux chercheurs ont démontré la faisabilité et la possibilité de l'utiliser pour remplacer les systèmes conducteurs classiques pour la charge de la batterie à bord du véhicule. Actuellement de nombreux efforts visent à étendre la technologie IPT vers son utilisation pour la charge pendant le mouvement du véhicule. Cette application, généralement appelée IPT dynamique, vise à surmonter la limite représentée par les arrêts prolongés nécessaires pour la recharge introduisant également la possibilité de réduction de la capacité de la batterie installée à bord du véhicule. Un système IPT est essentiellement basé sur la résonance de deux inducteurs magnétiquement couplés, l'émetteur, placé sur ou sous le sol, et le récepteur, placé sous le plancher du véhicule. La gamme de fréquence de fonctionnement typique pour les applications automobiles va de 20 kHz à environ 100 kHz. Le couplage entre les deux inductances s'effectue à travers un entrefer important, généralement d'environ 10-30 cm. Cette thèse présente les résultats des activités de recherche visant à la création d'un prototype pour l'IPT dynamique orienté vers le transport privé. A partir d'une analyse de l'état de l'art et des projets de recherche en cours dans ce domaine, ce travail présente le développement d'un modèle de circuit capable de décrire les phénomènes électromagnétiques à la base du transfert de puissance et l'interface avec l'électronique de puissance. Les analyses effectuées à travers le modèle développé fournissent la base pour la conception et la mise en œuvre d'un convertisseur dédié à faible coût et efficacité élevée pour l'alimentation du côté transmetteur. Une architecture générale de l'électronique de puissance qui gère le côté récepteur est proposée avec les circuits de protection supplémentaires. Une méthodologie pour la conception intégrée de la structure magnétique est illustrée. Cette méthodologie couvre les aspects de l'interface avec l'électronique de puissance, l'intégration sur un véhicule existant et l'installation sur l'infrastructure routière. Une série d'activités visant à la réalisation d'un site d'essai dédié sont présentées et discutées. En particulier, les activités liées à la création de l'infrastructure électrique ainsi que les questions et les méthodes d'implantation des émetteurs dans le revêtement routier sont présentées. L'objectif final est la création d'une ligne de recharge IPT dédiée de 100 mètres de long. Enfin, une méthodologie d'évaluation de l'exposition humaine est présentée et appliquée à la solution développée
Inductive power transmission (IPT) for electric vehicles (EVs) is a promising emergent technology that seems able to improve the electric mobility acceptance. In the last two decades many researchers have proved its feasibility and the possibility to use it to replace the common conductive systems for the charge of the on-board battery. Many efforts are currently aimed to extend the IPT technology towards its use for the charge during the vehicle motion. This application, commonly indicated as dynamic IPT, is aimed to overcome the limit represented by the long stops needed for the recharge introducing also the possibility of reducing the battery capacity installed on vehicle. An IPT system is essentially based on the resonance of two magnetically coupled inductors, the transmitter, placed on or under the ground, and the receiver, placed under the vehicle floor. The typical operating frequency range for the EVs application goes from 20 kHz to approximately 100 kHz. The coupling between the two inductors takes place through a large air-gap, usually about 10-30 cm. This thesis presents the results of the research activities aimed to the creation of a prototype for the dynamic IPT oriented to the private transport. Starting from an analysis of the state of the art and the current research projects on this domain, this work presents the development of a circuit model able to describe the electro- magnetic phenomena at the base of the power transfer and the interface with the power electronics. This model provides the information at the base of the design and the implementation of a dedicated low cost-high efficiency H-bridge converter for the supply of the transmitter side. A general architecture of the power electronics that manages the receiver side is proposed together with the additional protection circuits. A methodology for the integrated design of the magnetic structure is illustrated covering the aspects of the matching with the power electronics, the integration on an existing vehicle and the installation on the road infrastructure. A series of activities aimed to the implementation of a dedicated test site are presented and discussed. In particular, the activities related to the creation of the electrical infrastructure and the issues and methods for the embedding of the transmitters in the road pavement are presented. The final goal is the creation of a dedicated IPT charging line one hundred meters long. Finally, a methodology for the assessment of the human exposure is presented and applied to the developed solution

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Mohammad, Mostak. « Optimization of Inductive Wireless Charging Systems for Electric Vehicles : Minimizing Magnetic Losses and Limiting Electromagnetic Field Emissions ». University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1564756659521461.

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Chang, Kuei-Yuan, et 張貴淵. « Study of Inductive Power Transfer Systems for Bus-Stop-Powered Electric Vehicles ». Thesis, 2015. http://ndltd.ncl.edu.tw/handle/43557736019053407225.

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碩士
中華大學
電機工程學系碩士班
103
This dissertation discusses the inductive power transfer (IPT) system based on EE-shaped ferrite cores. The multi-H-bridge inverters are utilized as the primary side of the IPT system to increase the power transfer and efficiency. The EE-shaped ferrite cores are utilized to transfer the power for secondary side load with a parallel resonant capacitor. The magnetic field simulation and frequency response of the IPT system are presented. The issues of the IPT system such as efficiency, air gap, displacement, dislocation, and motion are discussed. The test results are presented to validate the performances of the proposed scheme and meet the requirements for bus-stop-powered electric vehicles.

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Chapitres de livres sur le sujet "Inductive power transfer, electric vehicles, recharge systems"

G. Marques, Emanuel, André Manuel dos Santos Mendes, Marina Mendes Sargento Domingues Perdigão et Valter S. Costa. « Inductive Power Transfer : Past, Current, and Future Research ». Dans The Dynamics of Vehicles - Basics, Simulation and Autonomous Systems [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108484.

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Electric vehicle (EV) technology has proven to be a propulsion technology of the future but urgently needs to address challenges such as lower-priced, reasonably sized EV for higher market penetration, higher life cycle efficiency, and increased power density. Range extension, in particular, in urban scenarios is critical. Inductive power transfer (IPT) technology solves simultaneously the electric hazard risks of conventional power cord battery chargers, but specially EV limited autonomy and related anxiety and even security. In this context, this chapter presents the past, current, and future research areas of IPT systems. A review of the main resonant compensation networks and prominent geometries of magnetic couplers is presented. Then, future research areas namely dynamic IPT and in-wheel IPT solutions are introduced along with their main challenges.

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Longo, Michela, Morris Brenna et Federica Foiadelli. « Research on Modelling Inductive Power Transfer for Electric Vehicles ». Dans Emerging Capabilities and Applications of Wireless Power Transfer, 255–91. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-5870-5.ch011.

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The environmental pollution caused by fossil fuels is a hot issue around the world in recent years. The gases lead to poor air quality, in particular in large cities, and the global warming that can cause ecological calamity such as tropical cyclones, heatwaves, drought, and extreme tides. International Energy Agency clearly states that the current energy trend is not sustainable environmentally, economically, and socially. Therefore, it must devise solutions to achieve the future economic growth without adverse environmental effects. The increasing diffusion of electric vehicles is driving academic and institutional research towards exploring different possible ways of charging vehicles in a fast, reliable, and safe way. For this reason, wireless power transfer systems have recently been receiving a lot of attention in the academic literature. This chapter reviews the main analytic and computational tools that are typically used to perform analyses in the context of inductive power transfer systems (IPTSs).

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N., Raghu, Balamurugan M., Trupti V. N., Chandrashekhar Badachi, Shriram S., Harish Balaji R. et Niranjan Kannanugo. « Wireless Power Transfer for High End and Low End EV Cars ». Dans Advances in Civil and Industrial Engineering, 48–66. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-8816-4.ch004.

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In recent years, resonant inductive power transfer is also being used in wireless power systems for portable computers, phones, and other electronics. Wireless charging uses WPT technology, which has the benefits of safe operation, reduced emissions, and cheap maintenance costs. In recent years, resonant inductive power transfer is also being used in wireless power systems for portable computers, phones, and other electronics. Wireless charging uses WPT technology, which has the benefits of safe operation, reduced emissions, and cheap maintenance costs. In practicality there are different types of vehicles used in day-to-day life. Four wheelers especially can mainly be divided into hatchback and sport utility vehicle (SUV). For SUV's, bottom end WPT, and hatchback (small end cars) back end WPT, can be implemented as its ground clearance varies from vehicle to vehicle. This chapter describes how to create a wireless battery charging system for electric vehicles using the inductive coupling technique for both the bottom-end and back-end models.

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Actes de conférences sur le sujet "Inductive power transfer, electric vehicles, recharge systems"

Balaji, Ashwin Kumar, Trishna Raj, Firoza Patel et Prashant Kumar Soori. « Intelligent Inductive Power Transfer Systems for Electric Vehicles ». Dans 2016 IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies (EmergiTech). IEEE, 2016. http://dx.doi.org/10.1109/emergitech.2016.7737300.

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Risch, F., S. Guenther et J. Franke. « Production concepts for inductive power transfer systems for electric vehicles ». Dans 2012 2nd International Electric Drives Production Conference (EDPC). IEEE, 2012. http://dx.doi.org/10.1109/edpc.2012.6425129.

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Di Capua, Giulia, Nicola Femia et Kateryna Stoyka. « Sensitivity Analysis of Inductive Power Transfer Systems for Electric Vehicles Battery Charging ». Dans 2019 16th International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD). IEEE, 2019. http://dx.doi.org/10.1109/smacd.2019.8795250.

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Huh, Jin, Wooyoung Lee, Gyu-Hyeong Cho, Byunghun Lee et Chun-Taek Rim. « Characterization of novel Inductive Power Transfer Systems for On-Line Electric Vehicles ». Dans 2011 IEEE Applied Power Electronics Conference and Exposition - APEC 2011. IEEE, 2011. http://dx.doi.org/10.1109/apec.2011.5744867.

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Dankov, Dobroslav, Prodan Prodanov et Nikolay Madjarov. « Application of an Inductive Power Transfer System for Charging Modern Electric Vehicles ». Dans 2021 17th Conference on Electrical Machines, Drives and Power Systems (ELMA). IEEE, 2021. http://dx.doi.org/10.1109/elma52514.2021.9503035.

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Dolara, A., S. Leva, M. Longo, F. Castelli-Dezza et M. Mauri. « Analysis of control strategies for compensated inductive power transfer system for electric vehicles charging ». Dans 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). IEEE, 2017. http://dx.doi.org/10.1109/eeeic.2017.7977760.

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Petersen, Marinus, et Friedrich W. Fuchs. « Multi-tap transformer topologies for improved tolerance against misalignment in inductive power transfer systems for electric vehicles ». Dans 2015 IEEE Energy Conversion Congress and Exposition. IEEE, 2015. http://dx.doi.org/10.1109/ecce.2015.7309838.

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Shi, Wenli, Francesca Grazian, Jianning Dong, Thiago Batista Soeiro et Pavol Bauer. « Detection of Metallic Foreign Objects and Electric Vehicles Using Auxiliary Coil Sets for Dynamic Inductive Power Transfer Systems ». Dans 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE). IEEE, 2020. http://dx.doi.org/10.1109/isie45063.2020.9152424.

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Chang, Chia-Jung, Chia-Ming Hung et Cheng-Chi Tai. « Numerical and experimental studies of the effects of parallel inductive coils and distance variation on wireless power transfer systems of electric vehicles ». Dans 2015 IEEE International Conference on Industrial Technology (ICIT). IEEE, 2015. http://dx.doi.org/10.1109/icit.2015.7125490.

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Cortes, Ivan, et Won-jong Kim. « Using Sensing Coils to Detect and Correct Lateral Misalignments in an Inductive Power-Transfer Wireless Charging System ». Dans ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5060.

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Inductive power transfer (IPT) remains one of the most common ways to achieve wireless power transfer (WPT), operating on the same electromagnetic principle as electrical transformers but with an air core. IPT has recently been implemented in wireless charging of consumer products such as smartphones and electric vehicles. However, one major challenge with using IPT remains ensuring precise alignment between the transmitting and receiving coils so that maximum power transfer can take place. In this paper, the use of additional sensing coils to detect and correct lateral misalignments in an IPT systems is modeled and tested. The sensing coils exploit magnetic-field symmetry to give a nonlinear measure of misalignment direction and magnitude. Experiments using such sensing coils give a misalignment-sensing resolution of less than 1 mm when applied to a common smartphone wireless charging system. Voltage readings from the sensing coils are used for feedback control of an experimental two-dimensional coil positioner. This system is able to reduce lateral misalignments to less than 2 mm in real time, allowing for efficient power transfer. The results of this experiment give confidence that similar sensing coils can be used to reduce lateral misalignments in scaled IPT systems, such as electric-vehicle wireless chargers.

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