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: IEEE Staff Publisher: ISBN: 9781665441766 Category : Languages : en Pages :
Book Description
Tracks for the Event AI and Data Science Robotics and Cybernetics Devices, Circuits and Systems Control and Instrumentation VLSI and Nanotechnology Power, Energy and Power Electronics Computational Biology and Biomedical Informatics Antenna and Microwave Techniques Communications Networks, IoT Computer Architecture and Embedded Systems Signal Processing and Multimedia Security and Privacy
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: IEEE Staff Publisher: ISBN: 9781538649978 Category : Languages : en Pages :
Book Description
Areas to be covered, but not limited to Power Electronics and Energy Conversion Electrical Machines and Drives Renewable Energy Systems Energy Storage and Battery Management Transportation Electrification and Vehicle Systems Smart Grid Technologies Control System, Robotics, Mechatronics and Automation Electronic Devices and Circuits
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: 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: Frede Blaabjerg Publisher: CRC Press ISBN: 1000378861 Category : Technology & Engineering Languages : en Pages : 205
Book Description
Photovoltaic (PV) energy generation is an excellent example of large-scale electric power generation through various parallel arrangements of small voltage-generating solar cells or modules. However, PV generation systems require power electronic converters system to satisfy the need for real-time applications or to balance the demand for power from electric. Therefore, a DC-DC power converter is a vital constituent in the intermediate conversion stage of PV power. This book presents a comprehensive review of various non-isolated DC-DC power converters. Non-isolated DC-DC converters for renewable energy system (RES) application presented in this book 1st edition through a detailed original investigation, obtained numerical/experimental results, and guided the scope to design new families of converters: DC-DC multistage power converter topologies, Multistage "X-Y converter family", Nx IMBC (Nx Interleaved Multilevel Boost Converter), Cockcroft Walton (CW) Voltage Multiplier-Based Multistage/Multilevel Power Converter (CW-VM-MPC) converter topologies, and Z-source and quasi Z-source. Above solutions are discussed to show how they can achieve the maximum voltage conversion gain ratio by adapting the passive/active component within the circuits. For assessment, we have recommended novel power converters through their functionality and designs, tested and verified by numerical software. Further, the hardware prototype implementation is carried out through a flexible digital processor. Both numerical and experimental results always shown as expected close agreement with primary theoretical hypotheses. This book offers guidelines and recommendation for future development with the DC-DC converters for RES applications based on cost-effective, and reliable solutions.
Author: Vikramarajan Jambulingam
Author: Vikrin Harsya
Author: IEEE Staff
Author: 
Author: Lai Shih Chieh
Author: IEEE Staff
Author: Stephen Moerer
Author: Fei Gu
Author: Jieli Li
Author: Frede Blaabjerg