Coupled Inductor Characterization for a High Performance Interleaved Boost Converter (POSTPRINT). PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Coupled Inductor Characterization for a High Performance Interleaved Boost Converter (POSTPRINT). PDF full book. Access full book title Coupled Inductor Characterization for a High Performance Interleaved Boost Converter (POSTPRINT). by . Download full books in PDF and EPUB format.
Author: Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
Interleaved power converter topologies have received increasing attention in recent years for high power and high performance applications. The advantages of interleaved boost converters include increased efficiency, reduced size, reduced electromagnetic emission, faster transient response, and improved reliability. The front end inductors in an interleaved boost converter are magnetically coupled to improve electrical performance and reduce size and weight. Compared to a direct coupled configuration, inverse coupling provides the advantages of lower inductor ripple current and negligible dc flux levels in the core. In this paper, we explore the possible advantages of core geometry on core losses and converter efficiency. Analysis of FEA simulation and empirical characterization data indicates a potential superiority of a square core, with symmetric 45 energy storage corner gaps, for providing both ac flux balance and maximum dc flux cancellation when wound in an inverse coupled configuration.
Author: Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
Interleaved power converter topologies have received increasing attention in recent years for high power and high performance applications. The advantages of interleaved boost converters include increased efficiency, reduced size, reduced electromagnetic emission, faster transient response, and improved reliability. The front end inductors in an interleaved boost converter are magnetically coupled to improve electrical performance and reduce size and weight. Compared to a direct coupled configuration, inverse coupling provides the advantages of lower inductor ripple current and negligible dc flux levels in the core. In this paper, we explore the possible advantages of core geometry on core losses and converter efficiency. Analysis of FEA simulation and empirical characterization data indicates a potential superiority of a square core, with symmetric 45 energy storage corner gaps, for providing both ac flux balance and maximum dc flux cancellation when wound in an inverse coupled configuration.
Author: Venkat Sai Prasad Gouribhatla Publisher: ISBN: Category : Languages : en Pages : 80
Book Description
"The main objective of this thesis is to compare and analyze two different high-gain dc-dc power electronic converters based on coupled inductors and capacitor-diode multiplier cells. The idea of these converters is to integrate the solar energy with a 400V DC microgrid. DC microgrids are more efficient, less expensive, and more reliable compared to AC microgrids. They also favor the integration of renewable energy sources. With the growing need for the utilization of more renewable sources of energy, photovoltaic panels have become one of the trending technologies which convert the energy from the sun to a useable electrical power. But these panels produce a low dc output voltage which cannot directly be connected to the high voltage dc distribution of the grid. They require high-gain dc-dc converters suitable for converting the output voltage of the solar panels to the dc distribution grid voltage. The topologies studied in this thesis provide a high dc voltage gain suitable for this application. The other significant advantage of these topologies is a continuous input current which increases the effective utilization of the source. These converters can also be used in applications involving high gain dc-dc conversion such as fuel cells, and energy storage applications like ultracapacitors. In this thesis, the different operating modes of the two high-gain dc-dc converters are explained in detail. Also, the voltage and current stresses seen by the components have been derived and power loss analysis is carried out for both the topologies. Recently, GaN switches have gained popularity for their higher efficiencies at higher switching frequencies, so this thesis also makes an attempt to compare Si to GaN devices in terms of efficiency improvements for the studied converters"--Abstract, page iii.
Author: Vikramarajan Jambulingam Publisher: LAP Lambert Academic Publishing ISBN: 9783659229503 Category : Languages : en Pages : 116
Book Description
A novel isolated zero-voltage-transition boost converter with coupled inductors is proposed in this project to satisfy the high power, high step-up and isolated requirements. In the proposed converter, the input-parallel configuration is adopted to share the large input current and to reduce the conduction losses, while the output-series structure is employed to double the output voltage gain. Consequently, a transformer with a low turns ratio can be applied, which makes the transformer design and optimize easily. Moreover, the active clamp circuits are employed to reduce the switch voltage stress and to recycle the energy stored in the leakage inductance. The ZVT is achieved during the whole switching transition for all the active switches, so the switching losses can be reduced greatly. Furthermore, the diode reverse-recovery problem is partly solved due to the leakage inductance. In addition, the magnetic integration technology is applied to improve the efficiency and to reduce the magnetic component size. Finally, a 12-V input 96-V output 1-kW prototype operating with 100-kHz switching frequency is built and tested to demonstrate the effectiveness of the proposed converter.
Author: Fei Gu Publisher: ISBN: 9781303471964 Category : Languages : en Pages : 99
Book Description
High boost ratio DC-DC converters are needed for many applications such as photovoltaic inverter systems where a low voltage input is often required to be boosted by a factor of ten or more with high efficiency. To achieve this coupled inductor based converters are often studied. In addition to providing high voltage gain, these converters provide benefits compared to non-coupled designs such as reduced RMS currents and galvanic isolation. However, their use also presents challenges; in practical devices imperfect magnetic coupling between windings gives rise to stored leakage inductance energy that may resonate with stray circuit capacitances resulting in ringing and large voltage transients. This problem is amplified in high step-up converters where the magnetic device typically contains a large number of secondary turns. As secondary leakage inductance scales with n2 this often results in a substantial secondary leakage inductance. A protective snubber circuit is typically required to absorb the leakage energy. Dissipation of the leakage energy results in poor converter efficiency and overheating; a desirable snubber should recycle the absorbed energy and create favorable zero-voltage or zero-current conditions at switching instances. In this thesis, a regenerative snubber universally suitable for coupled inductor converters containing an output inductor rectifier is presented. The snubber has been applied to a tapped-inductor boost converter designed for solar MPPT/inverter applications. The converter is able to achieve a high step-up ratio with high efficiency, limit EMI, and reduce voltage stress on switching devices.
Author: Abdulrhman Alshaabani Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 154
Book Description
Power converters have an important role in modern electric and electronic systems due to different voltage and power level requirements. Magnetic components are considered to be essential elements of the power converters. Storing the energy, filtering the signal, and transferring the energy are the main tasks of the magnetic components in the power converters. With developing the technology of power switches, the power converter can be operated at high frequencies. However, the magnetic components are suffering from their parasitic capacitance at high frequencies. Modeling the parasitic capacitance of the magnetic components is crucial to design power converters at high frequency. To date, the researches that have been conducted to modeling the parasitic capacitance have mainly targeted the low power applications with very high frequencies and high power with multi-layer transformers. Consequently, there remains a blank in the body of knowledge regarding modeling the parasitic capacitance of a single-layer inductor with a magnetic core at medium power. The relation between the number of turns and the parasitic capacitance of the single-layer inductors with the magnetic core should be considered. Moreover, improving the magnetic components by reducing parasitic capacitance is essential. By using the technique of reducing the parasitic capacitance, the resonant frequency of the magnetic components can be shifted to a higher frequency besides improving the impedance of the inductor. Therefore, this dissertation contributes in four main parts: (1) Modeling the parasitic capacitance of a single-layer inductor with a magnetic core. (2) Reducing the parasitic capacitance using the technique of magnetic coupling. (3) Selecting the appropriate range of high operating frequency for power converter applications. (4) Estimating the parasitic capacitance of interleaved coupled two-phase inductors.For the first part, a new approach to determining the total parasitic capacitance of a single-layer inductor with the magnetic core at a medium frequency range that is below the first resonant frequency is presented in this research. The proposed analytical approach can obtain the parasitic capacitance between the winding and core based on the physical structure of the inductor. The analytical approach depends on approximating the rod wire shape to a square shape. The total equivalent parasitic capacitance is derived. The results are verified by finite element analysis and experimental measurements using an impedance network analyzer.The second part of this research presents a technique for improving the performance of an inductor at high frequencies through mitigating effects caused by the parasitic capacitance. This technique adds a small capacitor to the coupled windings of the inductor to reduce the parasitic capacitance of the inductor. The relationship between the parasitic capacitance, magnetic coupling coefficient, and the small capacitor is introduced. The method to size the reduction capacitor is detailed in this research. The results of applying this technique show an improvement in the inductance impedance by 40 dB and shifting the resonant frequency to a higher frequency when ? = 0.97. The experimental results validated the effectiveness of the proposed technique. Moreover, a new methodology to properly select the highest operating frequency for the magnetic components in power electronics devices is presented in this research. Several parameters of the magnetic components such as the resonant frequency and the losses of the magnetic core are taken under consideration. The results of this methodology prove the maintaining the efficiency with reducing the volume of the magnetic core by 70%.Finally, the parasitic capacitance of the interleaved two-phase coupled-inductors is introduced in this research. Besides estimating the parasitic capacitance, the method of determining the size of the interleaved two-phase coupled inductors of boost converter is explained. The result shows the reduction of the size of the two-phase coupled inductors by using the proposed selecting suitable high operating frequency methodology. Moreover, the efficiency of the interleaved coupled inductors boost converter is maintained with reducing the volume by 60% and increasing the operating frequency by doubling the frequency.
Author: Sanat Rakesh Poddar Publisher: ISBN: Category : Languages : en Pages : 172
Book Description
High voltage gain power converters are required in many applications, especially in integration of solar energy with the grid. This thesis provides an effective solution for the same in the form of a Tapped Inductor Boost converter. This work provides a complete guide to the design process that can be followed for a high performance high voltage gain converter. High frequency (HF) operation of the converter is proposed to maximize the potential of the topology. HF operation includes some challenges and the solutions for the same are provided. A 20-400V, 400W prototype is designed and developed which serves as a platform to test low leakage transformer and to highlight the performance of the converter
Author: Stephen Moerer Publisher: ISBN: Category : Languages : en Pages : 69
Book Description
"As photovoltaic panels become a more dominant technology used to produce electrical power, more efficient and efficacious solutions are needed to convert this electrical power to a useable form. Solar microconverters, which are used to convert a single panel's power, effectively overcome issues such as shading and panel-specific maximum power point tracking associated with traditional solar converters which use several panels in series. This thesis discusses a high gain DC-DC converter for incorporating single low-voltage solar panels to a distribution level voltage present in a DC microgrid. To do this, a converter was developed using coupled inductors and a capacitor-diode multiplying cell which is capable of high-gain power transmissions and continuous input current. This approach improves the efficiency of the system compared to cascaded converters typically used in this application. Challenges with this converter are discussed, a passive lossless clamp is introduced, and simulation results are presented. This converter has additional applications where high gain DC-DC conversion is required, including fuel cells and energy storage systems such as batteries and ultracapacitors"--Abstract, page iii.
Author: W. H. Dennis Publisher: Elsevier ISBN: 148310334X Category : Technology & Engineering Languages : en Pages : 273
Book Description
Electronic Components and Systems focuses on the principles and processes in the field of electronics and the integrated circuit. Covered in the book are basic aspects and physical fundamentals; different types of materials involved in the field; and passive and active electronic components such as capacitors, inductors, diodes, and transistors. Also covered in the book are topics such as the fabrication of semiconductors and integrated circuits; analog circuitry; digital logic technology; and microprocessors. The monograph is recommended for beginning electrical engineers who would like to know the fundamental concepts, theories, and processes in the related fields.
Author: 
Author: 
Author: Vikrin Harsya
Author: Venkat Sai Prasad Gouribhatla
Author: Lai Shih Chieh
Author: Vikramarajan Jambulingam
Author: Fei Gu
Author: Abdulrhman Alshaabani
Author: Sanat Rakesh Poddar
Author: Stephen Moerer
Author: W. H. Dennis