Application of the averaged model of the diode-transistor switch for modelling characteristics of a boost converter with an IGBT

DC-DC converters are popular switch-mode electronic circuits used in power supply systems of many electronic devices. Designing such converters requires reliable computation methods and models of components contained in these converters, allowing for accurate and fast computations of their characteristics. In the paper, a new averaged model of a diode-transistor switch containing an IGBTis proposed. The form of the developed model is presented. Its accuracy is verified by comparing the computed characteristics of the boost converter with the characteristics computed in SPICE using a transient analysis and literature models of a diode and an IGBT. The obtained results of computations proved the usefulness of the proposed model

Application of the averaged model of the diode-transistor switch for modelling characteristics of a boost converter with an IGBT

DC-DC converters are popular switch-mode electronic circuits used in power supply systems of many electronic devices. Designing such converters requires reliable computation methods and models of components contained in these converters, allowing for accurate and fast computations of their characteristics. In the paper, a new averaged model of a diode-transistor switch containing an IGBTis proposed. The form of the developed model is presented. Its accuracy is verified by comparing the computed characteristics of the boost converter with the characteristics computed in SPICE using a transient analysis and literature models of a diode and an IGBT. The obtained results of computations proved the usefulness of the proposed model

Design and Control of Power Converters 2020

In this book, nine papers focusing on different fields of power electronics are gathered, all of which are in line with the present trends in research and industry. Given the generality of the Special Issue, the covered topics range from electrothermal models and losses models in semiconductors and magnetics to converters used in high-power applications. In this last case, the papers address specific problems such as the distortion due to zero-current detection or fault investigation using the fast Fourier transform, all being focused on analyzing the topologies of high-power high-density applications, such as the dual active bridge or the H-bridge multilevel inverter. All the papers provide enough insight in the analyzed issues to be used as the starting point of any research. Experimental or simulation results are presented to validate and help with the understanding of the proposed ideas. To summarize, this book will help the reader to solve specific problems in industrial equipment or to increase their knowledge in specific fields

Non-Linear Inductors Characterization in Real Operating Conditions for Power Density Optimization in SMPS

The exploitation of power inductors outside their linear region in switching converters can be achieved by raising the current until a decrease in the inductance can be noticed. This allows using a smaller magnetic core, increasing the power density of the converter. On the other hand, a detailed description of the magnetization curve including the temperature is required. Since this information is often not included in the inductor’s datasheets, this paper shows how to identify the behavior of an inductor when it is operated up to saturation and its temperature rises. In order to characterize the inductor in real operating conditions, a dedicated measurement rig was developed. It consists of a switching converter that encompasses the inductor under test and is controlled by a virtual instrument developed in LabVIEW. The characterization system was tested by retrieving the inductance and the magnetization curves vs. current for two commercial inductors at core temperatures up to 105 °C. The magnetic core was then characterized by the saturation current vs. inductance, obtaining an expression for the whole family of inductors sharing the same core. Finally, we experimentally analyzed the thermal transient of the inductors in operating conditions, confirming the fundamental role of the temperature in changing the current profiles and the core saturation condition

Prognostics of Power Electronic Converters in renewable energy systems: an approach based on acoustic emission measurement and thermal modelling

Renewable energy conversion systems play an important role in delivering energy from natural resources. Power Electronic Converters (PECs) are vital for efficiently conditioning the generated energy to align with the requirements of the source. One of the obstacles in the wide adaptation of renewable energies is the lack of efficiency and reliability in these systems. In wind turbines, Electrical circuits, including the PEC, contribute to 24% of total failures experienced by the system. One of the key components in a PEC is the Insulated Gate Bipolar Transistor (IGBT) which is used as a switching device in PECs. They occur due to different factors such as operating conditions, environmental factors (temperature and humidity) and the internal structure of the IGBTs which are formed of layers of different material with different properties. This research focuses on exploring the relationship between the changes in temperature of the IGBT chip with acoustic emissions signals. The aim of this research project is the development of a more cost-effective method for condition monitoring and prognostics of PECs. In this thesis, a thorough literature review of current condition monitoring schemes is provided and the gap in research is identified. A great number of scholars and experts have experimented with the AE in PECs however the link between the increase in temperature of this chip and the fluctuations in AE signals is not yet established. Under certain loading conditions, the temperature of IGBT chip changed from the ambient temperature (20℃) to 55℃. The acoustic emissions were measured in 5℃ intervals and it was discovered that after the temperature surpasses the 40℃ mark, the AE signal amplitude drops to 0.1 percent of its value at 20℃. Moreover, the rising temperature creates new peaks in the frequency domain at frequencies between 400-600 kHz

Emerging Power Electronics Technologies for Sustainable Energy Conversion

This Special Issue summarizes, in a single reference, timely emerging topics related to power electronics for sustainable energy conversion. Furthermore, at the same time, it provides the reader with valuable information related to open research opportunity niches

Emerging Power Electronics Technologies for Sustainable Energy Conversion

This Special Issue summarizes, in a single reference, timely emerging topics related to power electronics for sustainable energy conversion. Furthermore, at the same time, it provides the reader with valuable information related to open research opportunity niches