2019 IEEE 5th International forum on Research and Technology for Society and Industry (RTSI)
The use of Inductive Power Transfer (IPT) for feeding modern electronic systems and appliances is... more The use of Inductive Power Transfer (IPT) for feeding modern electronic systems and appliances is continuously increasing. As known, this technique allows energy transfer at relevant power levels (in the order of tens of kW) with distance between the transmitter and receiver coils of the order of tens of centimeters, and with efficiencies above 90%. In order to obtain these performances a form of synchronization between the primary and the secondary controller is often required. This paper examines the feasibility of the use of the inductive coupling for data transmission using the Power Line Communication (PLC) technique. Some preliminary results of the characterization of the transmission channel taken on a laboratory prototype are presented.
2017 International Applied Computational Electromagnetics Society Symposium - Italy (ACES)
As known electrodynamic levitation occurs without active control due to motion induced eddy curre... more As known electrodynamic levitation occurs without active control due to motion induced eddy currents. There are two main drawbacks related to electromagnetic bearings: 1) the presence of losses caused by the eddy currents, and 2) the onset of instability in undamped supercritical rotor systems. Accurate analysis of these devices, especially when the axial symmetry cannot be assumed, can be performed by numerical methods only. This paper presents a comparison between the experimental data taken on a prototype of an electrodynamic bearing and the numerical simulations obtained by a research code. The good agreement envisages the use of this code for the reduction of losses and for a better characterization of the instability conditions.
WSEAS Transactions on Circuits and Systems archive, 2007
In this paper we compare the effectiveness of the time, wavelet and Hilbert Huang domain analysis... more In this paper we compare the effectiveness of the time, wavelet and Hilbert Huang domain analysis of waveforms from a Non Destructive Test (NDT) equipment. The analysis of the signals from NDT systems is one of the most important activities since it allows to locate the actual defects. Very often the echoes traveling back to the sensors are superimposed with the signal from the transducer. We analyze the waveforms obtained by couples of sensors in order to extract the echoes and to recognize the points were they originate. A preliminary numerical analysis has been used to study the main features of the elastic waves propagations in inhomogeneous materials
The present paper proposes an approach to evaluate the “quality” of equivalent circuits of comple... more The present paper proposes an approach to evaluate the “quality” of equivalent circuits of complex devices obtained by a novel technique based on constitutive sub circuits and an Particle Swarm Optimization. In particular the robustness of the obtained circuits is evaluated by a sensitivity analysis, which leads to the identification of the range of variation of its frequency response, since different runs of the global extraction procedure lead to slightly different equivalent circuits (yet topologically coincident). The analysis of the numerical results give an insight on the robustness of as single case and at the same time attest the efficiency of the extraction technique
2019 IEEE 5th International forum on Research and Technology for Society and Industry (RTSI)
The use of Inductive Power Transfer (IPT) for feeding modern electronic systems and appliances is... more The use of Inductive Power Transfer (IPT) for feeding modern electronic systems and appliances is continuously increasing. As known, this technique allows energy transfer at relevant power levels (in the order of tens of kW) with distance between the transmitter and receiver coils of the order of tens of centimeters, and with efficiencies above 90%. In order to obtain these performances a form of synchronization between the primary and the secondary controller is often required. This paper examines the feasibility of the use of the inductive coupling for data transmission using the Power Line Communication (PLC) technique. Some preliminary results of the characterization of the transmission channel taken on a laboratory prototype are presented.
2017 International Applied Computational Electromagnetics Society Symposium - Italy (ACES)
As known electrodynamic levitation occurs without active control due to motion induced eddy curre... more As known electrodynamic levitation occurs without active control due to motion induced eddy currents. There are two main drawbacks related to electromagnetic bearings: 1) the presence of losses caused by the eddy currents, and 2) the onset of instability in undamped supercritical rotor systems. Accurate analysis of these devices, especially when the axial symmetry cannot be assumed, can be performed by numerical methods only. This paper presents a comparison between the experimental data taken on a prototype of an electrodynamic bearing and the numerical simulations obtained by a research code. The good agreement envisages the use of this code for the reduction of losses and for a better characterization of the instability conditions.
WSEAS Transactions on Circuits and Systems archive, 2007
In this paper we compare the effectiveness of the time, wavelet and Hilbert Huang domain analysis... more In this paper we compare the effectiveness of the time, wavelet and Hilbert Huang domain analysis of waveforms from a Non Destructive Test (NDT) equipment. The analysis of the signals from NDT systems is one of the most important activities since it allows to locate the actual defects. Very often the echoes traveling back to the sensors are superimposed with the signal from the transducer. We analyze the waveforms obtained by couples of sensors in order to extract the echoes and to recognize the points were they originate. A preliminary numerical analysis has been used to study the main features of the elastic waves propagations in inhomogeneous materials
The present paper proposes an approach to evaluate the “quality” of equivalent circuits of comple... more The present paper proposes an approach to evaluate the “quality” of equivalent circuits of complex devices obtained by a novel technique based on constitutive sub circuits and an Particle Swarm Optimization. In particular the robustness of the obtained circuits is evaluated by a sensitivity analysis, which leads to the identification of the range of variation of its frequency response, since different runs of the global extraction procedure lead to slightly different equivalent circuits (yet topologically coincident). The analysis of the numerical results give an insight on the robustness of as single case and at the same time attest the efficiency of the extraction technique
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