mauro mongiardo - Academia.edu (original) (raw)
Papers by mauro mongiardo
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](Proceedings of the IEEE, 2014
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Proceedings of the IEEE, 2014
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This paper investigates the possibility of achieving a load– independent output voltage for a res... more This paper investigates the possibility of achieving a load– independent output voltage for a resonant inductive Wireless Power Transfer (WPT) link.
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2019 IEEE Wireless Power Transfer Conference (WPTC), 2019
Capacitive wireless power transfer from one transmitter to multiple receivers is discussed and an... more Capacitive wireless power transfer from one transmitter to multiple receivers is discussed and analytically solved for the realization of maximum power transfer to uncoupled receivers. Simple closed-form expressions for the optimal terminating loads and the corresponding power output and transducer gain are determined by applying the maximum power transfer theorem. The results are validated by circuital simulation.
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Inductive wireless power transfer is a more mature technology than capacitive wireless transfer. ... more Inductive wireless power transfer is a more mature technology than capacitive wireless transfer. The aim of this work is to illustrate the duality principle as tool to transfer results from the inductive into the capacitive wireless power research. The efficiency maximization by varying the loads for a Single-Input Multiple-Output system is considered to exemplify this principle, and to highlight some limitations.
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URSI Radio Science Letters
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URSI Radio Science Letters
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Energies
In this paper a general-purpose procedure for optimizing a resonant inductive wireless power tran... more In this paper a general-purpose procedure for optimizing a resonant inductive wireless power transfer link adopting a multiple-input-multiple-output (MIMO) configuration is presented. The wireless link is described in a general–purpose way as a multi-port electrical network that can be the result of either analytical calculations, full–wave simulations, or measurements. An eigenvalue problem is then derived to determine the link optimal impedance terminations for efficiency maximization. A step-by-step procedure is proposed to solve the eigenvalue problem using a computer algebra system, it provides the configuration of the link, optimal sources, and loads for maximizing the efficiency. The main advantage of the proposed approach is that it is general: it is valid for any strictly–passive multi–port network and is therefore applicable to any wireless power transfer (WPT) link. To validate the presented theory, an example of application is illustrated for a link using three transmitt...
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International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Summary By using network theory, a wireless power transfer network based on coupled capacitance, ... more Summary By using network theory, a wireless power transfer network based on coupled capacitance, that is, on electric field coupling, is numerically investigated. Three possible solutions of interest are considered: one that maximizes efficiency, one that maximizes the power delivered to the load and one that realizes power matching (conjugate matching). In each case, at a selected frequency, the optimal source/load impedances are derived in closed form. It is shown that maximum efficiency solution has the possibility of achieving almost unitary efficiency. It is also shown that, as the efficiency is increased, the power delivered to the load is decreased. Copyright © 2016 John Wiley & Sons, Ltd.
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Wireless Power Transfer Algorithms, Technologies and Applications in Ad Hoc Communication Networks, 2016
Non-radiative Wireless power transfer (NR-WPT) is currently receiving considerable attention in v... more Non-radiative Wireless power transfer (NR-WPT) is currently receiving considerable attention in very different application scenarios. To design optimum solutions, a systematic approach based on circuit theory is needed and not yet available in the literature. In this chapter, by using a network formalism, the WPT link is modeled as a two-port network and a methodology to derive an equivalent circuit is proposed. This allows to compute in a rigorous and general way the maximum achievable performance for any given WPT link. The latter can be expressed in terms of either maximum power transfer efficiency (MPTE), or maximum power delivered to the load (MPDL), or by any suitable combination of the two. This chapter provides a comprehensive theoretical and general framework to predict such performance for both inductive and capacitive coupled links. In order to facilitate a practical implementation, both impedance and admittance matrix representations are discussed and computational examples are provided.
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2016 IEEE Wireless Power Transfer Conference (WPTC), 2016
A Moving Field Inductive Power Transfer (MFIPT) system for wireless inductive power supply of ele... more A Moving Field Inductive Power Transfer (MFIPT) system for wireless inductive power supply of electric vehicles on the road is described. To minimize losses only those primary coils located below the secondary coil of a vehicle are excited. The dynamics, the power balance of the MFIPT system, and the costs for the implementation of the system are discussed.
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2016 IEEE International Instrumentation and Measurement Technology Conference Proceedings, 2016
A new circuit-based method for performance evaluation of mid-range wireless power transfer links ... more A new circuit-based method for performance evaluation of mid-range wireless power transfer links is presented. The characterization is based on the measurement of selected node voltages, which allows to define the performance of the link in terms of its efficiency, output power, and mutual inductance. The main feature of the proposed method is that it can be applied to wireless power transfer systems during normal operational conditions, without the need for disconnecting the load. The characterization procedure is validated by experimental results.
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In this paper, a Wireless Power Transfer (WPT) link consisting of four magnetically coupled reson... more In this paper, a Wireless Power Transfer (WPT) link consisting of four magnetically coupled resonators (a transmitting and a receiving resonator coupled through two relay elements) is analyzed. Standard gain definitions are used for describing the performance of the link and the analytical expressions of the terminating impedances providing the optimal operating conditions are derived.
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Electronics
In this paper, the use of a repeater element between the transmitter and the receiver of a capaci... more In this paper, the use of a repeater element between the transmitter and the receiver of a capacitive wireless power transfer system for achieving larger transfer distances is analyzed. A network formalism is adopted and the performance described by using the three power gains usually adopted in the context of two-port active networks. The analytical expressions of the gains as function of the network elements are derived. Assuming that the parameters of the link are given and fixed, including the coupling factors between transmitter, repeater and receiver, the conditions for maximizing the different gains by acting on the network terminating impedances (i.e., load and internal source conductance) are determined. The analytical formulas are verified through circuital simulations.
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Energies
This paper analyzes a resonant inductive wireless power transfer link using a single transmitter ... more This paper analyzes a resonant inductive wireless power transfer link using a single transmitter and multiple receivers. The link is described as an (N+1)–port network and the problem of efficiency maximization is formulated as a generalized eigenvalue problem. It is shown that the desired solution can be derived through simple algebraic operations on the impedance matrix of the link. The analytical expressions of the loads and the generator impedances that maximize the efficiency are derived and discussed. It is demonstrated that the maximum realizable efficiency of the link does not depend on the coupling among the receivers that can be always compensated. Circuital simulation results validating the presented theory are reported and discussed.
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Proceedings of the IEEE, 2014
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Bookmarks Related papers MentionsView impact
Proceedings of the IEEE, 2014
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This paper investigates the possibility of achieving a load– independent output voltage for a res... more This paper investigates the possibility of achieving a load– independent output voltage for a resonant inductive Wireless Power Transfer (WPT) link.
Bookmarks Related papers MentionsView impact
2019 IEEE Wireless Power Transfer Conference (WPTC), 2019
Capacitive wireless power transfer from one transmitter to multiple receivers is discussed and an... more Capacitive wireless power transfer from one transmitter to multiple receivers is discussed and analytically solved for the realization of maximum power transfer to uncoupled receivers. Simple closed-form expressions for the optimal terminating loads and the corresponding power output and transducer gain are determined by applying the maximum power transfer theorem. The results are validated by circuital simulation.
Bookmarks Related papers MentionsView impact
Inductive wireless power transfer is a more mature technology than capacitive wireless transfer. ... more Inductive wireless power transfer is a more mature technology than capacitive wireless transfer. The aim of this work is to illustrate the duality principle as tool to transfer results from the inductive into the capacitive wireless power research. The efficiency maximization by varying the loads for a Single-Input Multiple-Output system is considered to exemplify this principle, and to highlight some limitations.
Bookmarks Related papers MentionsView impact
URSI Radio Science Letters
Bookmarks Related papers MentionsView impact
URSI Radio Science Letters
Bookmarks Related papers MentionsView impact
Energies
In this paper a general-purpose procedure for optimizing a resonant inductive wireless power tran... more In this paper a general-purpose procedure for optimizing a resonant inductive wireless power transfer link adopting a multiple-input-multiple-output (MIMO) configuration is presented. The wireless link is described in a general–purpose way as a multi-port electrical network that can be the result of either analytical calculations, full–wave simulations, or measurements. An eigenvalue problem is then derived to determine the link optimal impedance terminations for efficiency maximization. A step-by-step procedure is proposed to solve the eigenvalue problem using a computer algebra system, it provides the configuration of the link, optimal sources, and loads for maximizing the efficiency. The main advantage of the proposed approach is that it is general: it is valid for any strictly–passive multi–port network and is therefore applicable to any wireless power transfer (WPT) link. To validate the presented theory, an example of application is illustrated for a link using three transmitt...
Bookmarks Related papers MentionsView impact
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Summary By using network theory, a wireless power transfer network based on coupled capacitance, ... more Summary By using network theory, a wireless power transfer network based on coupled capacitance, that is, on electric field coupling, is numerically investigated. Three possible solutions of interest are considered: one that maximizes efficiency, one that maximizes the power delivered to the load and one that realizes power matching (conjugate matching). In each case, at a selected frequency, the optimal source/load impedances are derived in closed form. It is shown that maximum efficiency solution has the possibility of achieving almost unitary efficiency. It is also shown that, as the efficiency is increased, the power delivered to the load is decreased. Copyright © 2016 John Wiley & Sons, Ltd.
Bookmarks Related papers MentionsView impact
Wireless Power Transfer Algorithms, Technologies and Applications in Ad Hoc Communication Networks, 2016
Non-radiative Wireless power transfer (NR-WPT) is currently receiving considerable attention in v... more Non-radiative Wireless power transfer (NR-WPT) is currently receiving considerable attention in very different application scenarios. To design optimum solutions, a systematic approach based on circuit theory is needed and not yet available in the literature. In this chapter, by using a network formalism, the WPT link is modeled as a two-port network and a methodology to derive an equivalent circuit is proposed. This allows to compute in a rigorous and general way the maximum achievable performance for any given WPT link. The latter can be expressed in terms of either maximum power transfer efficiency (MPTE), or maximum power delivered to the load (MPDL), or by any suitable combination of the two. This chapter provides a comprehensive theoretical and general framework to predict such performance for both inductive and capacitive coupled links. In order to facilitate a practical implementation, both impedance and admittance matrix representations are discussed and computational examples are provided.
Bookmarks Related papers MentionsView impact
2016 IEEE Wireless Power Transfer Conference (WPTC), 2016
A Moving Field Inductive Power Transfer (MFIPT) system for wireless inductive power supply of ele... more A Moving Field Inductive Power Transfer (MFIPT) system for wireless inductive power supply of electric vehicles on the road is described. To minimize losses only those primary coils located below the secondary coil of a vehicle are excited. The dynamics, the power balance of the MFIPT system, and the costs for the implementation of the system are discussed.
Bookmarks Related papers MentionsView impact
2016 IEEE International Instrumentation and Measurement Technology Conference Proceedings, 2016
A new circuit-based method for performance evaluation of mid-range wireless power transfer links ... more A new circuit-based method for performance evaluation of mid-range wireless power transfer links is presented. The characterization is based on the measurement of selected node voltages, which allows to define the performance of the link in terms of its efficiency, output power, and mutual inductance. The main feature of the proposed method is that it can be applied to wireless power transfer systems during normal operational conditions, without the need for disconnecting the load. The characterization procedure is validated by experimental results.
Bookmarks Related papers MentionsView impact
In this paper, a Wireless Power Transfer (WPT) link consisting of four magnetically coupled reson... more In this paper, a Wireless Power Transfer (WPT) link consisting of four magnetically coupled resonators (a transmitting and a receiving resonator coupled through two relay elements) is analyzed. Standard gain definitions are used for describing the performance of the link and the analytical expressions of the terminating impedances providing the optimal operating conditions are derived.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Electronics
In this paper, the use of a repeater element between the transmitter and the receiver of a capaci... more In this paper, the use of a repeater element between the transmitter and the receiver of a capacitive wireless power transfer system for achieving larger transfer distances is analyzed. A network formalism is adopted and the performance described by using the three power gains usually adopted in the context of two-port active networks. The analytical expressions of the gains as function of the network elements are derived. Assuming that the parameters of the link are given and fixed, including the coupling factors between transmitter, repeater and receiver, the conditions for maximizing the different gains by acting on the network terminating impedances (i.e., load and internal source conductance) are determined. The analytical formulas are verified through circuital simulations.
Bookmarks Related papers MentionsView impact
Energies
This paper analyzes a resonant inductive wireless power transfer link using a single transmitter ... more This paper analyzes a resonant inductive wireless power transfer link using a single transmitter and multiple receivers. The link is described as an (N+1)–port network and the problem of efficiency maximization is formulated as a generalized eigenvalue problem. It is shown that the desired solution can be derived through simple algebraic operations on the impedance matrix of the link. The analytical expressions of the loads and the generator impedances that maximize the efficiency are derived and discussed. It is demonstrated that the maximum realizable efficiency of the link does not depend on the coupling among the receivers that can be always compensated. Circuital simulation results validating the presented theory are reported and discussed.
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Il manuale, ideato per gli studenti di Ingegneria, tratta i principali argomenti del corso di Cam... more Il manuale, ideato per gli studenti di Ingegneria, tratta i principali argomenti del corso di Campi Elettromagnetici introducendo l'uso dell'algebra di Clifford, che presenta considerevoli vantaggi. In particolare, sono usate in maniera estensiva le matrici di Pauli che consentono una formulazione delle equazioni di Maxwell, dei potenziali e delle principali equazioni dell'elettromagnetismo in forma compatta e appropriata per la descrizione al calcolatore. Completano il testo numerosi esempi di programmi che aiutano lo studente a verificare le teorie apprese.
Il manuale, ideato per gli studenti di Ingegneria, tratta i principali argomenti del corso di Campi Elettromagnetici introducendo l’uso dell’algebra di Clifford, che presenta considerevoli vantaggi. In particolare, sono usate in maniera estensiva le matrici di Pauli che consentono una formulazione delle equazioni di Maxwell, dei potenziali e delle principali equazioni dell’elettromagnetismo in forma compatta e appropriata per la descrizione al calcolatore.
Completano il testo numerosi esempi di programmi che aiutano lo studente a verificare le teorie apprese.
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