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Control and Topologies of Current Source Inverters

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 5760
The paper submitted to the Special Issue will be processed and published immediately if it's accepted after peer-review.
Please contact the guest editor or the journal editor ([email protected]) for any queries.

Special Issue Editors


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Guest Editor
Department of Sciences and Method for Engineering, University of Modena and Reggio Emilia, 42122 Reggio Emilia, Italy
Interests: power converters CSI and VSI; inductive power transfer; electric machine condition monitoring; renewable energy sources

E-Mail Website
Guest Editor
Department of Science and Methods for Engineering, University of Modena and Reggio Emilia, 42121 Reggio Emilia, Italy
Interests: power converters for renewable energies sources; high performance electric drives
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Special Issue Information

Dear Colleagues,

Transportation electrification, renewable energy sources (RES) exploitation, and industrial automation are just a few of the fields of application for power electronic converters. Because of the increase in electrical power demand, high efficiency, high power density, and reduced stress on insulation for drive longevity are all key aspects.

The advent of new devices, specifically wide bandgap (WBG) semiconductors, allowed for an increase in both switching and fundamental frequencies, facilitating high speed drive implementation, while on the other hand, the resulting large dv/dt increased the stress on the machine’s insulation and the severity of common mode disturbances.

CSI topologies are traditionally relegated to large power sizes, but can benefit from the WBG and become attractive in medium/low power applications.

The lower harmonic content of the output waveforms as a result of reduced dv/dt results in lower stress on the electric machine winding insulation. The inherent boosting capability enables the use of CSI as a single stage grid-connected converter for RES-based applications. In addition, modular CSI converters’ parallelization can be used to increase current rating and has several potential advantages compared with monolithic converters. Finally, CSI topologies would benefit from further improvements, both in terms of developing new additional circuits, control, and modulation techniques to improve efficiency and reduce common mode voltage.

This Special Issue is intended to give insights into the latest studies concerning the design and development of current source topologies, as well as the mitigation of the associated issues. We encourage all researchers and engineers working in this area to submit original works for review and publication in this Special Issue.

Topics of interest include, but are not limited to, the following:

  • Traditional and innovative CSI topologies in various applications.
  • Modeling, design, and application of different types of CSI converters.
  • Design and control of power-dense and efficient CSI converters for industry, transportation, and power generation applications.
  • Dedicated CSI control algorithms for electric drives applications.
  • Optimized CSI modulation techniques to improve efficiency, power quality, and harmonic content, and to mitigate common mode disturbances.
  • Bi-directional and/or multilevel CSI

Prof. Dr. Fabio Immovilli
Prof. Dr. Emilio Lorenzani
Guest Editors

Keywords

  • Current source converter
  • Current source inverter (CSI)
  • Common-mode voltage
  • PWM modulation
  • Space vector modulation (SVM)
  • Power electronics
  • Wide-bandgap transistors
  • Ground-leakage current
  • Reliability
  • Electrical drives
  • Grid-connected converters

Published Papers (3 papers)

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Research

10 pages, 2282 KiB  
Article
Compact Thermal Modeling of Power Semiconductor Devices with the Influence of Atmospheric Pressure
by Paweł Górecki
Energies 2022, 15(10), 3565; https://doi.org/10.3390/en15103565 - 12 May 2022
Cited by 3 | Viewed by 1350
Abstract
The efficiency of the heat dissipation process generated in semiconductor devices depends on many factors, related both to the parameters of the cooling system and environmental factors. Regarding the latter factors, ambient temperature and volume in which the device operates are typically indicated [...] Read more.
The efficiency of the heat dissipation process generated in semiconductor devices depends on many factors, related both to the parameters of the cooling system and environmental factors. Regarding the latter factors, ambient temperature and volume in which the device operates are typically indicated as the most important. However, in the case of the operation of semiconductor devices in non-standard conditions, e.g., in stratospheric airships, the thermal parameters of the device are significantly affected by a low value of atmospheric pressure. This paper presents a compact thermal model of a semiconductor device, considering the effects of reduced atmospheric pressure along with its experimental verification under various cooling conditions, thus obtaining high compliance for computation and measurement results. The formulated model is dedicated to circuit-level simulations, and it enables computations of the junction temperature of the semiconductor device in a short time. It is also shown that lowering atmospheric pressure can double the value of the junction-ambient thermal resistance. Full article
(This article belongs to the Special Issue Control and Topologies of Current Source Inverters)
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21 pages, 4219 KiB  
Article
Cascaded H-Bridge Converter Based on Current-Source Inverter with DC Links Magnetically Coupled to Reduce the DC Inductors Value
by Pedro E. Melín, Carlos R. Baier, Eduardo E. Espinosa and José R. Espinoza
Energies 2022, 15(1), 324; https://doi.org/10.3390/en15010324 - 4 Jan 2022
Cited by 2 | Viewed by 1734
Abstract
The main drawback of the Cascaded-H Bridge converter based on three-phase/single-phase current-source inverters is the large DC inductors needed to limit the variation of the DC current caused by the single-phase inverter oscillating power. If the oscillating power is somehow compensated, then the [...] Read more.
The main drawback of the Cascaded-H Bridge converter based on three-phase/single-phase current-source inverters is the large DC inductors needed to limit the variation of the DC current caused by the single-phase inverter oscillating power. If the oscillating power is somehow compensated, then the DC inductor can be designed just as a function of the semiconductors’ switching frequency, reducing its value. This work explores the use of three-phase/single-phase cells magnetically coupled through their DC links to compensate for the oscillating power among them and, therefore, reduce the DC inductor value. At the same time, front ends controlled by a non-linear control strategy equalize the DC currents among coupled cells to avoid saturating the magnetic core. The effectiveness of the proposal is demonstrated using mathematical analysis and corroborated by computational simulation for a 110 kVA load per phase and experimental tests in a 2 kVA laboratory prototype. The outcomes show that for the tested cases, coupling the DC links by a 1:1 ratio transformer allows reducing the DC inductor value below 20% of the original DC inductor required. The above leads to reducing by 50% the amount of magnetic energy required in the DC link compared to the original topology without oscillating power compensation, keeping the quality of the cell input currents and the load voltage. Full article
(This article belongs to the Special Issue Control and Topologies of Current Source Inverters)
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15 pages, 4745 KiB  
Article
Effect of Semiconductor Parasitic Capacitances on Ground Leakage Current in Three-Phase Current Source Inverters
by Giovanni Migliazza, Emilio Carfagna, Giampaolo Buticchi, Fabio Immovilli and Emilio Lorenzani
Energies 2021, 14(21), 7364; https://doi.org/10.3390/en14217364 - 5 Nov 2021
Cited by 1 | Viewed by 1826
Abstract
This paper investigates the influence of power semiconductor parasitic components on the ground leakage current in the three-phase Current Source Inverter topology, in the literature called H7 or CSI7. This topology allows reducing converter conduction losses with respect to the classic CSI, but [...] Read more.
This paper investigates the influence of power semiconductor parasitic components on the ground leakage current in the three-phase Current Source Inverter topology, in the literature called H7 or CSI7. This topology allows reducing converter conduction losses with respect to the classic CSI, but at the same time makes the topology more susceptible to the parasitic capacitances of the semiconductors devices. In the present work, a grid-connected converter for photovoltaic power systems is considered as a case study, to investigate the equivalent circuit for ground leakage current. The same analysis can be extended to applications regarding electric drives, since the HF model of electric machines is characterized by stray capacitance between windings and the stator slots/motor frame. Simulation results proved the correctness of the proposed simplified common-mode circuit and highlighted the need of an additional common-mode inductor filter in case of resonance frequencies of the common-mode circuit close to harmonics of the power converter switching frequency. Experimental results are in agreement with the theoretical analysis. Full article
(This article belongs to the Special Issue Control and Topologies of Current Source Inverters)
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