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Vito Giuseppe Monopoli; Abraham Marquez Alcaide; Jose I. Leon; Marco Liserre; Giampaolo Buticchi; Leopoldo Garcia Franquelo; Sergio Vazquez. Applications and Modulation Methods for Modular Converters Enabling Unequal Cell Power Sharing: Carrier Variable-Angle Phase-displacement Modulation Methods. IEEE Industrial Electronics Magazine 2021, PP, 2 -13.
AMA StyleVito Giuseppe Monopoli, Abraham Marquez Alcaide, Jose I. Leon, Marco Liserre, Giampaolo Buticchi, Leopoldo Garcia Franquelo, Sergio Vazquez. Applications and Modulation Methods for Modular Converters Enabling Unequal Cell Power Sharing: Carrier Variable-Angle Phase-displacement Modulation Methods. IEEE Industrial Electronics Magazine. 2021; PP (99):2-13.
Chicago/Turabian StyleVito Giuseppe Monopoli; Abraham Marquez Alcaide; Jose I. Leon; Marco Liserre; Giampaolo Buticchi; Leopoldo Garcia Franquelo; Sergio Vazquez. 2021. "Applications and Modulation Methods for Modular Converters Enabling Unequal Cell Power Sharing: Carrier Variable-Angle Phase-displacement Modulation Methods." IEEE Industrial Electronics Magazine PP, no. 99: 2-13.
An important barrier to the adoption and acceptance of synchronous reluctance (SyR) machines in different applications lies in its non-standardized design procedure. The conflicting requirements incurring at high speeds among electromagnetic torque and structural and thermal limitations can significantly influence the machine performance, leading to a real design challenge. Analytical models used for design purpose lack in accuracy and force the designer to heavily rely on finite element analysis (FEA), at least during the design refinement stage. This becomes even more computational expensive as the speed increases, as the evaluation of the rotor structural behaviour is required. This work presents a computational efficient hybrid analytical-FE design process able to consider all the main limiting design aspects of SyR machine incurring at high speed, namely structural and thermal. As a vessel to investigate the proposed design routine accuracy, several high speed SyR machines have been designed for a wide range of operational speeds (up to 70krpm). The thermal and mechanical factors limiting the high speed operation are deeply analyzed aiming at maximize the mechanical output power. The proposed design approach is then validated by comparison against experimental measurements on a 5kW-50krpm SyR prototype.
Gianvito Gallicchio; Mauro Di Nardo; Marco Palmieri; Alessandro Marfoli; Michele Degano; Chris Gerada; Francesco Cupertino. High Speed Synchronous Reluctance Machines: Modeling, Design and Limits. IEEE Transactions on Energy Conversion 2021, PP, 1 -1.
AMA StyleGianvito Gallicchio, Mauro Di Nardo, Marco Palmieri, Alessandro Marfoli, Michele Degano, Chris Gerada, Francesco Cupertino. High Speed Synchronous Reluctance Machines: Modeling, Design and Limits. IEEE Transactions on Energy Conversion. 2021; PP (99):1-1.
Chicago/Turabian StyleGianvito Gallicchio; Mauro Di Nardo; Marco Palmieri; Alessandro Marfoli; Michele Degano; Chris Gerada; Francesco Cupertino. 2021. "High Speed Synchronous Reluctance Machines: Modeling, Design and Limits." IEEE Transactions on Energy Conversion PP, no. 99: 1-1.
Electric variable speed drives (VSD) have been replacing mechanic and hydraulic systems in many sectors of industry and transportation because of their better performance and reduced cost. However, the electric systems still face the issue of being considered less reliable than the mechanical ones. For this reason, researchers have been actively investigating effective ways to increase the reliability of such systems. This paper is focused on the analysis of the common-mode voltage (CMV) generated by the operation of the VSDs which directly affects to the lifetime and reliability of the complete system. The method is based on the mathematical description of the harmonic spectrum of the CMV depending on the PWM method implementation. A generalized PWM method where the carriers present a variable phase-displacement is developed. As a result of the presented analysis, the CMV reduction is achieved by applying the PWM method with optimal carrier phase-displacement angles without any external component and/or passive filtering technique. The optimal values of the carrier phase-displacement angles are obtained considering the minimization of the CMV total harmonic distortion. The resulting method is easily implementable on mostly off-the-shelf mid-range micro-controller control platforms. The strategy has been evaluated in a scaled-down experimental setup proving its good performance.
Abraham Marquez Alcaide; Vito Monopoli; Xuchen Wang; Jose Leon; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo Franquelo. Common-Mode Voltage Harmonic Reduction in Variable Speed Drives Applying a Variable-Angle Carrier Phase-Displacement PWM Method. Energies 2021, 14, 2929 .
AMA StyleAbraham Marquez Alcaide, Vito Monopoli, Xuchen Wang, Jose Leon, Giampaolo Buticchi, Sergio Vazquez, Marco Liserre, Leopoldo Franquelo. Common-Mode Voltage Harmonic Reduction in Variable Speed Drives Applying a Variable-Angle Carrier Phase-Displacement PWM Method. Energies. 2021; 14 (10):2929.
Chicago/Turabian StyleAbraham Marquez Alcaide; Vito Monopoli; Xuchen Wang; Jose Leon; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo Franquelo. 2021. "Common-Mode Voltage Harmonic Reduction in Variable Speed Drives Applying a Variable-Angle Carrier Phase-Displacement PWM Method." Energies 14, no. 10: 2929.
Electric variable speed drives (VSDs) based on two VSDs connected to a multiphase machine are an attractive solution to replace high-power mechanic and hydraulic systems in many sectors of industry and transportation because they present high performance with reduced cost, volume and weight. Among the causes which affect the reliability of dual VSDs, the common-mode current flowing through the machine bearing is an important issue. This paper faces the mitigation of the common-mode current by reducing the common-mode voltage (CMV) generated by the operation of a dual VSD. The CMV reduction is carried out without introducing any extra device and/or passive filtering method. This CMV reduction is performed by applying a specific phase-displacement between the modulation strategies of each single inverter drive. The proposed technique has been evaluated in a down scaled experimental setup in order to test its effectiveness.
Abraham Marquez Alcaide; Xuchen Wang; Hao Yan; Jose I. Leon; Vito Giuseppe Monopoli; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo G. Franquelo. Common-Mode Voltage Mitigation of Dual Three-Phase Voltage Source Inverters in a Motor Drive Application. IEEE Access 2021, 9, 67477 -67487.
AMA StyleAbraham Marquez Alcaide, Xuchen Wang, Hao Yan, Jose I. Leon, Vito Giuseppe Monopoli, Giampaolo Buticchi, Sergio Vazquez, Marco Liserre, Leopoldo G. Franquelo. Common-Mode Voltage Mitigation of Dual Three-Phase Voltage Source Inverters in a Motor Drive Application. IEEE Access. 2021; 9 (99):67477-67487.
Chicago/Turabian StyleAbraham Marquez Alcaide; Xuchen Wang; Hao Yan; Jose I. Leon; Vito Giuseppe Monopoli; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo G. Franquelo. 2021. "Common-Mode Voltage Mitigation of Dual Three-Phase Voltage Source Inverters in a Motor Drive Application." IEEE Access 9, no. 99: 67477-67487.
Common-mode voltage (CMV) in electric drives causes leakage current causing consequently EMI problems, loss and reduction of their components’ lifetime. Several solutions have been proposed which usually lead to higher cost because additional components are used. This paper is focused on the mitigation of the resulting CMV produced by the operation of the VSD by means of a specifically designed PWM method. The proposal is based on the analysis of the CMV harmonic spectrum using the Fourier analysis. The CMV mitigation is achieved by modifying the time-shift displacement of the carriers each sampling time considering a multi-carrier PWM technique. The resulting method has been evaluated in a down scaled experimental setup and it is easily implementable on mostly off-the-shelf mid-range micro-controller control platforms.
Abraham Marquez Alcaide; Hao Yan; Xuchen Wang; Jose I. Leon; Ramon Portillo; Giampaolo Buticchi; Sergio Vazquez; Vito Giuseppe Monopoli; Marco Liserre; Leopoldo G. Franquelo. Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method. IEEE Access 2021, 9, 56115 -56126.
AMA StyleAbraham Marquez Alcaide, Hao Yan, Xuchen Wang, Jose I. Leon, Ramon Portillo, Giampaolo Buticchi, Sergio Vazquez, Vito Giuseppe Monopoli, Marco Liserre, Leopoldo G. Franquelo. Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method. IEEE Access. 2021; 9 (99):56115-56126.
Chicago/Turabian StyleAbraham Marquez Alcaide; Hao Yan; Xuchen Wang; Jose I. Leon; Ramon Portillo; Giampaolo Buticchi; Sergio Vazquez; Vito Giuseppe Monopoli; Marco Liserre; Leopoldo G. Franquelo. 2021. "Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method." IEEE Access 9, no. 99: 56115-56126.
Permanent magnet machines with segmented stator cores are affected by additional harmonic components of the cogging torque which cannot be minimized by conventional methods adopted for one-piece stator machines. In this study, a novel approach is proposed to minimize the cogging torque of such machines. This approach is based on the design of multiple independent shapes of the tooth tips through a topological optimization. Theoretical studies define a design formula that allows to choose the number of independent shapes to be designed, based on the number of stator core segments. Moreover, a computationally-efficient heuristic approach based on genetic algorithms and artificial neural network-based surrogate models solves the topological optimization and finds the optimal tooth tips shapes. Simulation studies with the finite element method validates the design formula and the effectiveness of the proposed method in suppressing the additional harmonic components. Moreover, a comparison with a conventional heuristic approach based on a genetic algorithm directly coupled to finite element analysis assesses the superiority of the proposed approach. Finally, a sensitivity analysis on assembling and manufacturing tolerances proves the robustness of the proposed design method.
Elia Brescia; Donatello Costantino; Paolo Massenio; Vito Monopoli; Francesco Cupertino; Giuseppe Cascella. A Design Method for the Cogging Torque Minimization of Permanent Magnet Machines with a Segmented Stator Core Based on ANN Surrogate Models. Energies 2021, 14, 1880 .
AMA StyleElia Brescia, Donatello Costantino, Paolo Massenio, Vito Monopoli, Francesco Cupertino, Giuseppe Cascella. A Design Method for the Cogging Torque Minimization of Permanent Magnet Machines with a Segmented Stator Core Based on ANN Surrogate Models. Energies. 2021; 14 (7):1880.
Chicago/Turabian StyleElia Brescia; Donatello Costantino; Paolo Massenio; Vito Monopoli; Francesco Cupertino; Giuseppe Cascella. 2021. "A Design Method for the Cogging Torque Minimization of Permanent Magnet Machines with a Segmented Stator Core Based on ANN Surrogate Models." Energies 14, no. 7: 1880.
Electromagnetic clutches are widely used devices in industrial applications when a torque must be transmitted between two components without mechanical contact avoiding friction and so reducing wear and maintenance time. Hysteresis clutches are a particular variant of electromagnetic couplers used when a constant torque from zero to the synchronous speed needs to be transmitted. This paper deals with the analysis, design and optimization of hysteresis clutches. After a brief introduction on the operating principle, a new method of analysis is then introduced. The latter allows a fast prediction of the performance of hysteresis couplers without sacrificing the accuracy of the performance evaluation even when adopting anisotropic magnetic materials. The introduced method, based on a static finite element simulation followed by a post-processing of the evaluated magnetic field, is then used within an automatic design procedure in order to identify the inevitable trade-offs encountered when optimizing the geometry of any hysteresis clutches with a given outer envelope. The obtained results are commented in-depth and allow to draw general design guidelines with special regards to the selection of the number of poles and the magnetic materials. The effect of the high level of anisotropy of the most common magnetic materials showing the highest energy density is carefully taken into account allowing to deduce the optimal preferred direction of magnetization.
Gianvito Gallicchio; Mauro Di Nardo; Marco Palmieri; Francesco Cupertino. Analysis, Design and Optimization of Hysteresis Clutches. IEEE Open Journal of Industry Applications 2020, 1, 258 -269.
AMA StyleGianvito Gallicchio, Mauro Di Nardo, Marco Palmieri, Francesco Cupertino. Analysis, Design and Optimization of Hysteresis Clutches. IEEE Open Journal of Industry Applications. 2020; 1 (99):258-269.
Chicago/Turabian StyleGianvito Gallicchio; Mauro Di Nardo; Marco Palmieri; Francesco Cupertino. 2020. "Analysis, Design and Optimization of Hysteresis Clutches." IEEE Open Journal of Industry Applications 1, no. 99: 258-269.
Currently, the necessity of efficient and reliable power systems is also increasing because of the strict requirements that standards and regulations impose, but still costs have to remain low. The monitoring and control of the components' lifetime can lead to reduce maintenance costs.However, overcoming the related challenges is not a straightforward task, as it involves knowledge of power device physics, smart management of electrical quantities, and optimal maintenance planning and scheduling. It represents a multidisciplinary issue being faced in the last decade.
Marco Liserre; Giampaolo Buticchi; Jose Ignacio Leon; Abraham Marquez Alcaide; Vivek Raveendran; Youngjong Ko; Markus Andresen; Vito Giuseppe Monopoli; Leopoldo Franquelo. Power Routing: A New Paradigm for Maintenance Scheduling. IEEE Industrial Electronics Magazine 2020, 14, 33 -45.
AMA StyleMarco Liserre, Giampaolo Buticchi, Jose Ignacio Leon, Abraham Marquez Alcaide, Vivek Raveendran, Youngjong Ko, Markus Andresen, Vito Giuseppe Monopoli, Leopoldo Franquelo. Power Routing: A New Paradigm for Maintenance Scheduling. IEEE Industrial Electronics Magazine. 2020; 14 (3):33-45.
Chicago/Turabian StyleMarco Liserre; Giampaolo Buticchi; Jose Ignacio Leon; Abraham Marquez Alcaide; Vivek Raveendran; Youngjong Ko; Markus Andresen; Vito Giuseppe Monopoli; Leopoldo Franquelo. 2020. "Power Routing: A New Paradigm for Maintenance Scheduling." IEEE Industrial Electronics Magazine 14, no. 3: 33-45.
This paper proposes a new variable structure control scheme for a variable-speed, fixed-pitch ducted wind turbine, equipped with an annular, brushless permanent-magnet synchronous generator, considering a back-to-back power converter topology. The purpose of this control scheme is to maximise the aerodynamic power over the entire wind speed range, considering the mechanical safety limits of the ducted wind turbine. The ideal power characteristics are achieved with the design of control laws aimed at performing the maximum power point tracking control in the low wind speeds region, and the constant speed, power, and torque control in the high wind speed region. The designed control laws utilize a Luenberger observer for the estimation of the aerodynamic torque and a shallow neural network for wind speed estimation. The effectiveness of the proposed method was verified through tests in a laboratory setup. Moreover, a comparison with other solutions from the literature allowed us to better evaluate the performances achieved and to highlight the originality of the proposed control scheme.
Diego Calabrese; Gioacchino Tricarico; Elia Brescia; Giuseppe Leonardo Cascella; Vito Giuseppe Monopoli; Francesco Cupertino. Variable Structure Control of a Small Ducted Wind Turbine in the Whole Wind Speed Range Using a Luenberger Observer. Energies 2020, 13, 4647 .
AMA StyleDiego Calabrese, Gioacchino Tricarico, Elia Brescia, Giuseppe Leonardo Cascella, Vito Giuseppe Monopoli, Francesco Cupertino. Variable Structure Control of a Small Ducted Wind Turbine in the Whole Wind Speed Range Using a Luenberger Observer. Energies. 2020; 13 (18):4647.
Chicago/Turabian StyleDiego Calabrese; Gioacchino Tricarico; Elia Brescia; Giuseppe Leonardo Cascella; Vito Giuseppe Monopoli; Francesco Cupertino. 2020. "Variable Structure Control of a Small Ducted Wind Turbine in the Whole Wind Speed Range Using a Luenberger Observer." Energies 13, no. 18: 4647.
Widespread dissemination of electric mobility is highly dependent on the power converters, storage systems and renewable energy sources. The efficiency and reliability, combined with the emerging and innovative technologies, are crucial when speaking of power converters. In this paper the interleaved dc–dc topology has been considered for EV charging, due to its improved reliability. The efficiency comparison of the SiC-MOSFET and Si-IGBT-based converters has been done on wide range of switching frequency and output inductances. The interleaved converters were considered with the optimal switching parameters resulting from the analysis done on a detailed parasitic circuit model, ensuring minimum losses and maintaining the safe operating area. The analysis included the comparison of different inductors, and for the selected ones the complete system efficiency and cost were conducted. The results indicate the benefits when SiC-MOSFETs are applied to the interleaved dc–dc topology for wide ranges of output inductances and switching frequencies, and most importantly, they offer lower total volume but also total cost. The realistic and dynamic models of power devices obtained from the manufacturer’s experimental tests have been considered in both LTspice and PLECS simulation tools.
Jelena Loncarski; Vito Giuseppe Monopoli; Giuseppe Leonardo Cascella; Francesco Cupertino. SiC-MOSFET and Si-IGBT-Based dc-dc Interleaved Converters for EV Chargers: Approach for Efficiency Comparison with Minimum Switching Losses Based on Complete Parasitic Modeling. Energies 2020, 13, 4585 .
AMA StyleJelena Loncarski, Vito Giuseppe Monopoli, Giuseppe Leonardo Cascella, Francesco Cupertino. SiC-MOSFET and Si-IGBT-Based dc-dc Interleaved Converters for EV Chargers: Approach for Efficiency Comparison with Minimum Switching Losses Based on Complete Parasitic Modeling. Energies. 2020; 13 (17):4585.
Chicago/Turabian StyleJelena Loncarski; Vito Giuseppe Monopoli; Giuseppe Leonardo Cascella; Francesco Cupertino. 2020. "SiC-MOSFET and Si-IGBT-Based dc-dc Interleaved Converters for EV Chargers: Approach for Efficiency Comparison with Minimum Switching Losses Based on Complete Parasitic Modeling." Energies 13, no. 17: 4585.
he cascaded H-bridge converter (CHB) is a very suitable solution with inherent modularity for many applications such as flexible ac transmission systems and motor drives. In this paper, the discontinuous pulse-width- modulation (DPWM) by clamping some power cells is used in the CHB because it permits to reduce the switching losses in the power devices. However, this provokes a high harmonic distortion (base-bands and side-bands har- monics) in the CHB output voltage compared with the quality obtained avoiding to clamp cells, just applying the conventional phase-shifted PWM (PS-PWM) technique. This has been studied for the three-cell CHB topology but the extension for a N-cell CHB with several clamped cells is a challenge that is addressed in this work. A generalized CHB harmonic voltage analysis applying the DPWM method is presented considering multiple clamped cells. The har- monic distortion mitigation target can be decoupled into two objectives. The proposed method cleverly groups the cells (one clamped + one or two non-clamped cells) to mitigate the base-bands harmonic distortion. Simultane- ously, a variable-angle PS-PWM technique is applied to the CHB in order to mitigate the side-bands harmonics content. Experimental results demonstrate the good performance of the proposed method.
Abraham Marquez; Vito Giuseppe Monopoli; Anatolii Tcai; Jose I. Leon; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo Garcia Franquelo. Discontinuous-PWM Method for Multilevel $N$-Cell Cascaded H-Bridge Converters. IEEE Transactions on Industrial Electronics 2020, 68, 7996 -8005.
AMA StyleAbraham Marquez, Vito Giuseppe Monopoli, Anatolii Tcai, Jose I. Leon, Giampaolo Buticchi, Sergio Vazquez, Marco Liserre, Leopoldo Garcia Franquelo. Discontinuous-PWM Method for Multilevel $N$-Cell Cascaded H-Bridge Converters. IEEE Transactions on Industrial Electronics. 2020; 68 (9):7996-8005.
Chicago/Turabian StyleAbraham Marquez; Vito Giuseppe Monopoli; Anatolii Tcai; Jose I. Leon; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo Garcia Franquelo. 2020. "Discontinuous-PWM Method for Multilevel $N$-Cell Cascaded H-Bridge Converters." IEEE Transactions on Industrial Electronics 68, no. 9: 7996-8005.
In the field of sensorless control of permanent magnet synchronous motors (PMSMs), different techniques based on machine anisotropies have been studied and implemented successfully. Nevertheless, most proposed approaches extract the rotor position information from the measured machine currents, that, when applied to low-power machines, might require high-bandwidth current sensors. An interesting alternative is given by sensorless techniques that exploit the star-point voltage of PMSMs, such as the direct flux control technique. This work aims at analyzing the conditions of applicability of such technique by considering a more thorough description of the machine inductance matrix. After a comprehensive mathematical description of the technique and characterization of the machine anisotropy information that is extracted from the star-point voltage, simulation as well as experimental results conducted on a test machine are presented and discussed in order to validate the proposed theory.
Emanuele Grasso; Marco Palmieri; Riccardo Mandriota; Francesco Cupertino; Matthias Nienhaus; Stephan Kleen. Analysis and Application of the Direct Flux Control Sensorless Technique to Low-Power PMSMs. Energies 2020, 13, 1453 .
AMA StyleEmanuele Grasso, Marco Palmieri, Riccardo Mandriota, Francesco Cupertino, Matthias Nienhaus, Stephan Kleen. Analysis and Application of the Direct Flux Control Sensorless Technique to Low-Power PMSMs. Energies. 2020; 13 (6):1453.
Chicago/Turabian StyleEmanuele Grasso; Marco Palmieri; Riccardo Mandriota; Francesco Cupertino; Matthias Nienhaus; Stephan Kleen. 2020. "Analysis and Application of the Direct Flux Control Sensorless Technique to Low-Power PMSMs." Energies 13, no. 6: 1453.
Multilevel cascaded H-bridge converters (CHB) are an attractive solution for multiple applications like flexible ac transmission systems and solid-state smart transformers, among others. This paper is focused on a CHB working with unbalanced conditions per cell (different cell dc voltages and/or cell voltage references). In this scenario, the phase-shifted pulse-width modulation (PS-PWM) technique produces a harmonic distortion around twice the carrier frequency and its multiples in the CHB output voltage. In this paper, a generalized variable-angle PSPWM method is presented in order to mitigate this drawback improving the CHB output voltage harmonic spectrum. The proposed method is based on applying a mathematical search algorithm to determine the phase displacement angles to be applied to the PS-PWM technique. Experimental results show how this objective is achieved without introducing any disadvantage in the CHB operation. The method can be applied to CHB with any number of cells.
Abraham Marquez; Jose I. Leon; Vito Giuseppe Monopoli; Sergio Vazquez; Marco Liserre; Leopoldo Garcia Franquelo. Generalized Harmonic Control for CHB Converters With Unbalanced Cells Operation. IEEE Transactions on Industrial Electronics 2019, 67, 9039 -9047.
AMA StyleAbraham Marquez, Jose I. Leon, Vito Giuseppe Monopoli, Sergio Vazquez, Marco Liserre, Leopoldo Garcia Franquelo. Generalized Harmonic Control for CHB Converters With Unbalanced Cells Operation. IEEE Transactions on Industrial Electronics. 2019; 67 (11):9039-9047.
Chicago/Turabian StyleAbraham Marquez; Jose I. Leon; Vito Giuseppe Monopoli; Sergio Vazquez; Marco Liserre; Leopoldo Garcia Franquelo. 2019. "Generalized Harmonic Control for CHB Converters With Unbalanced Cells Operation." IEEE Transactions on Industrial Electronics 67, no. 11: 9039-9047.
Wide bandgap (WBG) power devices such as silicon carbide (SiC) can viably supply high speed electrical drives, due to their capability to increase efficiency and reduce the size of the power converters. On the other hand, high frequency operation of the SiC devices emphasizes the effect of parasitics, which generates reflected wave transient overvoltage on motor terminals, reducing the life time and the reliability of electric drives. In this paper, a SiC metal-oxide-semiconductor field-effect transistor (MOSFET) based two level (2L) inverter is systematically studied and compared to the performance of Si insulated-gate bipolar transistor (IGBT) based three level (3L) neutral point clamped (NPC) inverter topologies, for high speed AC motor loads, in terms of efficiency, overvoltages, heat sink design, and cost. A fair comparison was introduced for the first time, having the same output voltage capabilities, output current total harmonic distortion (THD), and overvoltages for the three systems. The analysis indicated the convenience of using the SiC MOSFET based 2L inverter for lower output power. In the case of the maximum output power, the heat sink volume was found to be 20% higher for the 2L SiC based inverter when compared to 3L NPC topologies. Simulations were carried out by realistic dynamic models of power switch modules obtained from the manufacturer’s experimental tests and verified both in the LTspice and PLECS simulation packages.
Jelena Loncarski; Vito Giuseppe Monopoli; Riccardo Leuzzi; Leposava Ristic; Francesco Cupertino. Analytical and Simulation Fair Comparison of Three Level Si IGBT Based NPC Topologies and Two Level SiC MOSFET Based Topology for High Speed Drives. Energies 2019, 12, 4571 .
AMA StyleJelena Loncarski, Vito Giuseppe Monopoli, Riccardo Leuzzi, Leposava Ristic, Francesco Cupertino. Analytical and Simulation Fair Comparison of Three Level Si IGBT Based NPC Topologies and Two Level SiC MOSFET Based Topology for High Speed Drives. Energies. 2019; 12 (23):4571.
Chicago/Turabian StyleJelena Loncarski; Vito Giuseppe Monopoli; Riccardo Leuzzi; Leposava Ristic; Francesco Cupertino. 2019. "Analytical and Simulation Fair Comparison of Three Level Si IGBT Based NPC Topologies and Two Level SiC MOSFET Based Topology for High Speed Drives." Energies 12, no. 23: 4571.
Hysteresis motor and clutches have several advantages, such as constant torque from zero to synchronous speed, low torque ripple, and low fabrication cost. Low efficiency and power factor are the main features that have limited the application of this type of electrical machine to few applications. Being a niche argument, little literature has addressed the problem of analytical and finite element (FE) modelling of hysteresis electrical machines. This paper first describes the most important contributions of the literature on the analytical and FE modelling of hysteresis motors and clutches and then proposes a method for the fast computation of its performance. The proposed procedure consists of two steps: first, a magneto-static FE simulation is performed considering the normal magnetization curve of the hysteresis material; then, the average torque is computed by a post-processing analysis. The proposed method is used to analyze a hysteresis clutch and the obtained results are compared with those achieved using a commercial finite element software that implements a vector hysteresis model.
Gianvito Gallicchio; Marco Palmieri; Mauro Di Nardo; Francesco Cupertino. Fast Torque Computation of Hysteresis Motors and Clutches Using Magneto-static Finite Element Simulation. Energies 2019, 12, 3311 .
AMA StyleGianvito Gallicchio, Marco Palmieri, Mauro Di Nardo, Francesco Cupertino. Fast Torque Computation of Hysteresis Motors and Clutches Using Magneto-static Finite Element Simulation. Energies. 2019; 12 (17):3311.
Chicago/Turabian StyleGianvito Gallicchio; Marco Palmieri; Mauro Di Nardo; Francesco Cupertino. 2019. "Fast Torque Computation of Hysteresis Motors and Clutches Using Magneto-static Finite Element Simulation." Energies 12, no. 17: 3311.
The use of fast wide-band gap devices in high-speed electrical drives with steep pulse-width modulation voltage waveforms is the main cause of increased stress on the electric machine insulation system and, consequently, of reduced reliability of the whole system. This represents a major concern in safety-critical applications such as in the aerospace and electric transportation fields. The novel contribution of this work is to assess the effects of electrical aging on complex insulation systems (i.e. a whole stator winding) by analyzing easily measurable macroscopic quantities. To this purpose, an electrical aging procedure is defined, and the effects produced on three tested motors are presented. Three different analysis methods are adopted with the aim of assessing the damage caused to an AC motor winding by such steep voltage waveforms and hence to evaluate the state of aging of the insulation system.
Riccardo Leuzzi; Vito Giuseppe Monopoli; Luca Rovere; Francesco Cupertino; Pericle Zanchetta. Analysis and Detection of Electrical Aging Effects on High-Speed Motor Insulation. IEEE Transactions on Industry Applications 2019, 55, 6018 -6025.
AMA StyleRiccardo Leuzzi, Vito Giuseppe Monopoli, Luca Rovere, Francesco Cupertino, Pericle Zanchetta. Analysis and Detection of Electrical Aging Effects on High-Speed Motor Insulation. IEEE Transactions on Industry Applications. 2019; 55 (6):6018-6025.
Chicago/Turabian StyleRiccardo Leuzzi; Vito Giuseppe Monopoli; Luca Rovere; Francesco Cupertino; Pericle Zanchetta. 2019. "Analysis and Detection of Electrical Aging Effects on High-Speed Motor Insulation." IEEE Transactions on Industry Applications 55, no. 6: 6018-6025.
High-speed electrical drives normally require converters capable of high-frequency operation. For this reason, converters based on SiC MOSFETs have been spreading in this field. Nevertheless, the problems caused by the high dv/dt imposed by SiC MOSFETs, like the premature failure of the motor winding insulation and the EMI generation, are drawing more and more attention by the expert of this sector. In fact, these issues can deeply affect the system reliability and hence can represent a limiting factor for all those applications where the continuity of operation is the highest priority. To avoid the use of SiC MOSFETs in the most sensitive applications, this paper presents a solution, which consists in a Si IGBT based inverter fed by Si IGBT based DC/DC converter performing a suitable DC voltage regulation. Therefore, the aim of this work is to prove that a stable operation of a high-speed drive can be guaranteed through the proposed converter configuration. To prove the effectiveness of the proposed solution, experimental results on a laboratory setup have been presented.
Vito Giuseppe Monopoli; Pierluigi Sidella; Francesco Cupertino. A Si-IGBT-Based Solution to Drive High-Speed Electrical Machines. IEEE Transactions on Industry Applications 2019, 55, 4900 -4909.
AMA StyleVito Giuseppe Monopoli, Pierluigi Sidella, Francesco Cupertino. A Si-IGBT-Based Solution to Drive High-Speed Electrical Machines. IEEE Transactions on Industry Applications. 2019; 55 (5):4900-4909.
Chicago/Turabian StyleVito Giuseppe Monopoli; Pierluigi Sidella; Francesco Cupertino. 2019. "A Si-IGBT-Based Solution to Drive High-Speed Electrical Machines." IEEE Transactions on Industry Applications 55, no. 5: 4900-4909.
Cascaded H-bridge converter (CHB) is a multilevel topology that is a well-suited solution for multiple applications such as flexible ac transmission systems or motor drives. This paper is focused on a CHB where the cells present an aging mismatch. This can be caused by the maintenance operation which forces to replace some damaged cells of the converter with new or repaired ones. In this paper, a new improved approach of the active thermal control (ATC) of the CHB using Discontinuous PWM (D-PWM) is presented. The D-PWM technique is used to reduce the power losses of one cell reducing its average temperature in order to increase its remaining lifetime. However, the combination of D-PWM with traditional Phase-Shifted PWM (PS-PWM) introduces high harmonic distortion in the output voltage of the CHB converter around twice the carrier frequency. A detailed harmonic distortion analysis of the CHB output voltage when the D-PWM based ATC is active is presented. From this analysis, a modification of the traditional PS-PWM is derived to eliminate the harmonic distortion at twice the carrier frequency. Experimental results show how the ATC using D-PWM is achieved whereas the harmonic distortion around twice the carrier frequency is eliminated.
Abraham Marquez; Vito Giuseppe Monopoli; Jose I. Leon; Youngjong Ko; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo G. Franquelo; Abraham Marquez Alcaide. Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control. IEEE Transactions on Industrial Electronics 2019, 67, 2776 -2785.
AMA StyleAbraham Marquez, Vito Giuseppe Monopoli, Jose I. Leon, Youngjong Ko, Giampaolo Buticchi, Sergio Vazquez, Marco Liserre, Leopoldo G. Franquelo, Abraham Marquez Alcaide. Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control. IEEE Transactions on Industrial Electronics. 2019; 67 (4):2776-2785.
Chicago/Turabian StyleAbraham Marquez; Vito Giuseppe Monopoli; Jose I. Leon; Youngjong Ko; Giampaolo Buticchi; Sergio Vazquez; Marco Liserre; Leopoldo G. Franquelo; Abraham Marquez Alcaide. 2019. "Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control." IEEE Transactions on Industrial Electronics 67, no. 4: 2776-2785.
The present research aims to exploit commercially available materials and machines to fabricate multilayer, topologically designed transducers, which can be embedded into mechanical devices, such as soft or rigid grippers. Preliminary tests on the possibility of fabricating 3D-printed transducers using a commercial conductive elastomeric filament, carbon black-filled thermoplastic polyurethane, are presented. The commercial carbon-filled thermoplastic polyurethane (TPU), analyzed in the present paper, has proven to be a candidate material for the production of 3D printed displacement sensors. Some limitations in fabricating the transducers from a 2.85 mm filament were found, and comparisons with 1.75 mm filaments should be conducted. Moreover, further research on the low repeatability at low displacements and the higher performance of the hollow structure, in terms of repeatability, must be carried out. To propose an approach that can very easily be reproduced, only commercial filaments are used.
Claudio Manganiello; David Naso; Francesco Cupertino; Orazio Fiume; Gianluca Percoco. Investigating the Potential of Commercial-Grade Carbon Black-Filled TPU for the 3D Printing of Compressive Sensors. Micromachines 2019, 10, 46 .
AMA StyleClaudio Manganiello, David Naso, Francesco Cupertino, Orazio Fiume, Gianluca Percoco. Investigating the Potential of Commercial-Grade Carbon Black-Filled TPU for the 3D Printing of Compressive Sensors. Micromachines. 2019; 10 (1):46.
Chicago/Turabian StyleClaudio Manganiello; David Naso; Francesco Cupertino; Orazio Fiume; Gianluca Percoco. 2019. "Investigating the Potential of Commercial-Grade Carbon Black-Filled TPU for the 3D Printing of Compressive Sensors." Micromachines 10, no. 1: 46.
This work is focused on the design optimization of electrical machines that are used in small-scale direct-drive aerogenerators. A ducted wind turbine, equipped with a diffuser, is considered due to its enhanced power capability with respect to bare turbines. An annular type Permanent Magnet brushless generator is integrated in the turbine structure: the stator coils are placed in the internal part of the diffuser, whereas the permanent magnets are on an external ring connected to the turbine blade tips. Moreover, as regards the stator windings, the Printed Circuit Board (PCB) technology is investigated in order to exploit its advantages with respect to conventional wire coils, such as the increased current density capacity, the reduction of costs, and the enhanced precision and repeatability of the PCBs. An original design procedure is presented together with some scalability rules. An automated tool has been developed in order to aid the electrical machine designer in the first design stages: the tool performs multi-objective optimizations (using the Matlab Genetic Algorithm Toolbox), coupled to fast Finite Element analysis (through the open-source software FEMM) for the evaluation of the electromagnetic torque and field distribution. The proposed procedure is applied to the design of an annular PM generator directly coupled to a small-scale turbine for an urban application.
Marco Palmieri; Salvatore Bozzella; Giuseppe Leonardo Cascella; Marco Bronzini; Marco Torresi; Francesco Cupertino. Wind Micro-Turbine Networks for Urban Areas: Optimal Design and Power Scalability of Permanent Magnet Generators. Energies 2018, 11, 2759 .
AMA StyleMarco Palmieri, Salvatore Bozzella, Giuseppe Leonardo Cascella, Marco Bronzini, Marco Torresi, Francesco Cupertino. Wind Micro-Turbine Networks for Urban Areas: Optimal Design and Power Scalability of Permanent Magnet Generators. Energies. 2018; 11 (10):2759.
Chicago/Turabian StyleMarco Palmieri; Salvatore Bozzella; Giuseppe Leonardo Cascella; Marco Bronzini; Marco Torresi; Francesco Cupertino. 2018. "Wind Micro-Turbine Networks for Urban Areas: Optimal Design and Power Scalability of Permanent Magnet Generators." Energies 11, no. 10: 2759.